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205results about How to "Avoid shear damage" patented technology
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Sectional steel concrete shear wall with replaceable wall toe component and wall toe component
ActiveCN105003004AGuaranteed not to breakStrong plastic deformationWallsShock proofingEngineeringShear force
The invention provides a sectional steel concrete shear wall with a replaceable wall toe component and the wall toe component. Sectional steel is built in the shear wall; a wall toe installing cavity is reserved on the shear wall arranged between the bottom end of the sectional steel and a lower story floor component; the dismountable wall toe component is arranged in the wall toe installing cavity; the top end of the wall toe component is connected with the bottom end of the sectional steel; the bottom end of the wall toe component is connected with the lower story floor component; the wall toe component comprises a U-shaped plate clamp and an energy dissipation spring; communicated clamp grooves are symmetrically processed in the two sides of the U-shaped plate clamp; connecting steel plates are arranged at the two ends of the energy dissipation spring; and the connecting steel plates are clamped on the outer side of the clamp grooves, so that the energy dissipation spring is arranged inside the U-shaped plate clamp. The sectional steel concrete shear wall and the wall toe component have the characteristics that a whole mother wall is enabled not to be damaged; the wall toe component can be replaced for many times; and the earthquake-proof function can be fast recovered.
Owner:西安建筑科大工程技术有限公司
Steel beam-steel pipe concrete column joint based on damage control concept
ActiveCN106400954AImproving the ability to resist rare earthquakesThe power transmission path is clearBuilding constructionsShock resistanceRebar
The invention relates to a steel beam-steel pipe concrete column joint based on a damage control concept and belongs to the field of structural engineering. The joint comprises H-shaped steel in a shaped steel beam, a steel beam end plate, lug plates, box iron, a hinge pin with a nut, steel bars, low-yield-point steel plates, a steel pipe in a steel pipe concrete column and high-strength bolts. The steel beam end plate is welded to the H-shaped steel in the shaped steel beam. The lug plates are welded to the steel beam end plate and the steel pipe in the steel pipe concrete column. The two lug plates are connected in a hinged mode through the hinge pin with the nut and subjected to dull polish treatment. The low-yield-point steel plates are connected with the H-shaped steel through the high-strength bolts. The steel bars are inserted into holes of the low-yield-point steel plates. The low-yield-point steel plates are clamped by the box iron through the high-strength bolts. The steel beam-steel pipe concrete column joint based on the damage control concept can be applied to high-rise building combined structure systems, the shock resistance of high-rise buildings can be improved, continuous energy consumption of the joint during large strain of reciprocating loads is achieved, and the joint has broad engineering application prospects.
Owner:CHONGQING UNIV
Prefabricated column and precast construction method thereof
ActiveCN104088397AFirmly connectedNo technical quality requirementsStrutsBuilding material handlingArchitectural engineeringRebar
Owner:HUA HUI ENGINEERING DESIGN GROUP CO LTD
Determination method of cable steel wire corrosion fatigue damage law, application, device and fixture
ActiveCN110044740AAccurate service lifeEasy to operateWeather/light/corrosion resistanceMaterial strength using repeated/pulsating forcesElectrical resistance and conductanceMeasuring instrument
The invention discloses a determination method of a cable steel wire corrosion fatigue damage law, application, a device and a fixture. Four parts of specific content are involved, wherein the first part is the corrosion fatigue damage law acquisition method which comprises the steps that a corrosion fatigue test is performed by processing an environment spectrum and a load spectrum of service conditions, a resistance method is used to measure corrosion fatigue test general damage and stress corrosion damage, the difference value between the two types of damage is corrosion fatigue damage, andthe law of the damage is fitted by use of a formula; the second part is the application of the corrosion fatigue damage law, wherein after the test law is obtained, a high-precision resistance measuring instrument is used to test current resistance, and then residual life can be obtained; the third part is the device used for determining the damage law, wherein the device comprises a double-layercorrosion cavity, a salt mist box, the high-precision resistance measuring instrument, a constant-temperature box and a fatigue testing machine; and the fourth part is the insulated fixture used forpreventing interference of equipment on resistance testing. Through combined use of the four parts, reasonable residual life of a cable steel wire in a complicated environment can be given, and convenience is brought to engineering practice.
Owner:SOUTHEAST UNIV
Long-united bridge widening splicing structure and construction method thereof
ActiveCN103541310AEasy to useReduce the use effectBridge structural detailsBridge erection/assemblyResource savingBuilding construction
The invention relates to a long-united bridge widening splicing structure which comprises an old bridge, a new bridge and a splicing seam. The long-united bridge widening splicing structure is characterized in that transverse splicing between the old bridge and the new bridge is realized through the splicing seam, the splicing seam is formed by a continuous splicing section and a discrete splicing section, a new bridge main beam and an old bridge main beam of the continuous splicing section are connected by adopting a cast-in-situ wet joint and a horizontal partition, and a new bridge main beam and an old bridge main beam of the discrete splicing section are connected by arranging a connecting component at an interval, so that the new bridge and the old bridge which are widened form a firm integral structure. The long-united bridge widening splicing structure has the advantages of simple construction method, short construction period, avoidance of shear failure of a widened old bridge support and the like, is suitable for long-united bridge widening construction of highways of various levels, fully utilizes resources of the old bridge, meets requirements of sustainable development and building of resource-saving and environment-friendly society, and is worthy of popularization.
Owner:FUZHOU UNIV +1
Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed
The invention discloses a construction method of a bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed, comprising the following steps of: (1) machining a bamboo wood; processing a bamboo sheet; and manufacturing a bamboo rib cage, a bamboo rib grid and a bamboo rib U-shaped anchor nail; (2) flattening a field and setting out a pile position; (3) utilizing a vibration shock method of a vibration immersed tube method to construct to form a bamboo rib cage crushed stone pile and paving a crushed stone cushion layer on a pile top; and (4) digging a step; paving, connecting and anchoring the bamboo rib grid; and backfilling a soil material and rolling and leveling. The construction method is characterized in that the bamboo rib cage can effectively improve the bearing capability and the stability of the crushed stone pile; the bamboo rib grid can reinforce the connection between a filling region and a digging region, the differential deposition is reduced, and sliding and instability of sliding along a filling and digging connecting face is prevented; and the construction method has the beneficial effects that a bamboo rib is used as a reinforcement material so that a construction industry is developed towards a low-carbon, energy-saving, environment-friendly and sustainable development direction, and saves the investment under the condition of meeting the requirements of roadbed bearing capability and deformation stability.
Owner:HUNAN UNIV
Locally-embedded steel pipe concrete column type aseismatic bridge pier
InactiveCN104562922AReduced shear reinforcementImprove construction qualityBridge structural detailsBridge materialsNormal strength concreteReinforced concrete
The invention provides a locally-embedded steel pipe concrete column type aseismatic bridge pier, and belongs to the technical field of structural design of bridges. The aseismatic bridge pier comprises longitudinal ribs, stirrups, steel pipes, common strength concrete, high strength concrete and a bridge pier foundation. According to the bridge pier, a steel pipe concrete column is locally embedded to the reinforced concrete bridge pier, the advantage of high ductility of the common strength concrete bridge pier and the advantages of high pressure resistance, high shear resisting, high bearing capacity and high ductility of the steel pipe high strength concrete are fully utilized, and therefore, the shear resistance, the pressure resistance, the bearing capacity, the ductility and the energy consumption capacity of the bridge pier can be improved, the bridge pier can be avoided shearing damaging and bending conquassation, and as a result, the aseismatic performance of the reinforced concrete bridge pier can be effectively improved; the steel pipe concrete column is embedded in the local maximum force bearing range of the bridge pier, so that the purpose of the improving the aseismatic performance of the bridge pier is achieved, and the purpose of minimizing the cost of the bridge pier and the construction difficulty can be reached. The bridge pier can be widely applied to the field of bridge construction design.
Owner:DALIAN UNIV OF TECH
Friction energy dissipation combination node for assembly type self-resetting pre-stressed concrete framework
ActiveCN108571067AImprove energy consumptionReduce pollutionBuilding constructionsProtective buildings/sheltersReinforced concrete columnPre stress
The invention discloses a friction energy dissipation combination node for an assembly type self-resetting pre-stressed concrete framework. The friction energy dissipation combination node comprises aprefabricated reinforced concrete column, a prefabricated reinforced concrete beam, a column end pre-embedded steel plate, a friction plate, an unbonded pre-stress steel strand, a beam end pre-embedded steel sleeve, and a pre-stress steel strand porous channel; an end plate anchor bar, an anti-shearing support and a friction plate fixing support are welded on the column end pre-embedded steel plate; an anti-shearing stud is welded on the inner wall of the beam end pre-embedded steel sleeve, the friction plate is arranged on a profile steel web, a friction plate fixing screw is welded on the friction plate and penetrates through the friction plate fixing support in a reserved screw opening, two nuts arranged inside and outside the friction plate fixing support fixe and regulate the position of the friction plate, the seismic energy is dissipated by rubbing the profile steel web of the beam end pre-embedded steel sleeve, the friction plate can be changed, and the prefabricated assemblytype concrete framework structure is excellent in anti-seismic property and self-resetting capability in the high-intensity earthquake.
Owner:SOUTHEAST UNIV
Method for preparing carbon fiber fabrics friction material used for wet clutch and application thereof
InactiveCN102343679ABest friction and wear resistanceAvoid shear damageFriction liningFiberCarbon felt
The invention relates a method for preparing a carbon fiber fabrics friction material used for a wet clutch and an application thereof, which comprises the following steps: 1), 3D braiding carbon felt or carbon fiber and puncturing to carbon fiber fabrics as a preform; 2), dipping the preform into a soaker, wherein the soaker comprises high temperature resistance brake sheet phenol resin containing a rubbing agent with one or more from SiO2, ZrO2, boron iron, manganese iron and chromium iron, controlling the concentration of the dipped perform at 1.68g / cm<3>-2g / cm<3> by controlling the dipping pressure or controlling the addition of high temperature resistance brake sheet phenol resin; 3), pressurizing and thermocuring the dipped preform which is impregnated cloth; 4) punching the processed impregnated cloth into a required shape, coating a binder on one surface of the impregnated cloth and performing a heat bonding with a support steel back. The method for preparing the carbon fiber fabrics friction material used for the wet clutch and the application are capable of raising the friction and wear performance of the wet carbon fiber fabrics and conveying large torsional moment. According to the invention, the obtained friction material still has good friction and wear performance even if the friction material is thinned.
Owner:CENT SOUTH UNIV
Nonmetal anti-floating anchor multi-interface shear stress combination test method
ActiveCN107560776ASufficient locking forceAvoid shear damageMeasurement of force componentsEngineeringNonmetal
The present invention belongs to the civil engineering in-situ test technology field, and relates to a nonmetal anti-floating anchor multi-interface shear stress combination test method. The method performs synchronization real-time measurement of axial forces and shear stresses of a nonmetal anti-floating anchor body, an anchorage body and an interface of a rock and the anchorage body, and employs a novel test device to obtain pull-out amounts of the rod body and the anchorage body to research an anti-floating anchor mechanical transmission mechanism and deformation characteristics. The nonmetal anti-floating anchor multi-interface shear stress combination test method is simple in technology, simple in structure, high in test precision, high in operationality and direct and accurate in numerical result, can obtain multi-interface shear stress of a nonmetal anti-floating anchor, and is high in applicability and feasibility.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Steel box girder bridge deck pavement layer with high stability and high vibration resistance
InactiveCN104278630AHigh bonding strengthImprove bindingIn situ pavingsBridge structural detailsPolyesterEpoxy
The invention relates to a steel box girder bridge deck pavement layer with high stability and high vibration resistance. The steel box girder bridge deck pavement layer comprises a steel plate (1), wherein a waterproof bonding layer (2), a modified epoxy resin structure glue layer (3), a polyester filament and geotechnical cloth combined layer (4), a first high-viscosity modified asphalt tack coat (5), a first high-viscosity modified polyester fiber mixed stone mastic asphalt mixture layer (6), a second high-viscosity modified asphalt tack coat (7) and a second high-viscosity modified polyester fiber mixed stone mastic asphalt mixture layer (8) are arranged on the upper surface of the steel plate (1) from bottom to top. The steel box girder bridge deck pavement layer has the advantages of improving the bonding strength of an asphalt concrete pavement layer and a bridge deck slab, and improving the combining performance of the asphalt concrete pavement layer and the bridge deck slab due to high strength, good elasticity and high toughness of a geotechnical cloth; the geotechnical cloth has good traction action on the whole bridge deck slab, and finally, the purposes that the bridge deck pavement layer is prevented from shearing fracture, the asphalt pavement is prevented from translation, upheaval and other diseases in a travelling process, and the stability and vibration resistance of the bridge deck slab are effectively improved are achieved.
Owner:WUHAN UNIV
Anti-seismic low-carbon building structure
The invention discloses an anti-seismic low-carbon building structure, which comprises a main building, column bases, a foundation platform and a supporting platform, wherein the main building is fixed on the semispherical foundation platform through the column bases, the foundation platform is connected to the supporting platform; the main building comprises a main body frame, a roof frame and a base frame; the supporting platform comprises a plastic elastic layer, concrete, a concrete foundation, a bidirectional foundation face layer rib, bidirectional foundation side ribs and a bidirectional foundation bottom rib. According to the anti-seismic low-carbon building structure, the foundation platform is semispherical, during earthquake, the semispherical foundation and the upper main body structure integrally swing on a bearing platform, the building structure has no overlarge local stress, and after earthquake, the structure cannot be destroyed; the main building is formed by a hexagonal steel mesh reinforcement frame and has certain elasticity, and the setting direction of the column bases is vertical and obliquely downward, so that acting forces in different directions can be offset during earthquake, and the shear failure is avoided during earthquake.
Owner:NANYANG INST OF TECH
CFRP rib inhaul cable group anchorage device for bridge and manufacturing process of CFRP tendon inhaul cable group anchorage device
ActiveCN105421231AImprove adhesionAvoid shear damageBridge structural detailsEngineeringAluminium oxide
The invention discloses a CFRP rib inhaul cable group anchorage device for a bridge. The device comprises an anchor cup, an upper wire separation end plate, a lower wire separation end plate and multiple wire separation partition plates located between the upper wire separation end plate and the lower wire separation end plate are arranged in the anchor cup, the ends of CFRP ribs penetrate through a wire separation vibration attenuation block, the lower wire separation end plate, all the wire separation partition plates and the upper wire separation end plate in sequence from bottom to top and then are fixed to the upper wire separation end plate, the upper wire separation end plate, the lower wire separation end plate and all the wire separation partition plates are each provided with wire separation holes allowing the CFRP rib to pass through, each wire separation hole is internally provided with a gasket, the space formed by the upper end plate, the lower end plate and the inner wall of the anchor cup is divided into multiple filling chambers by the wire separation partition plates, and each filling chamber is filled with rubber mass. According to the CFRP rib inhaul cable group anchorage device, the wire separation end plates and the wire separation partition plates are arranged in the anchor cup, so that wire separation and fixation for the CFRP ribs are facilitated, meanwhile, the anchorage device is separated into the multiple filling chambers, the rubber mass in each filling chamber is made of hard particles with different yields, such as iron sand particles or aluminum oxide particles, rigidity of the rubber mass is adjusted to be increased gradually from the lower end of the anchorage device to the upper end of the anchorage device, the device is adapted to the anchoring loading features of the CFRP ribs, and the anchoring force of the CFRP ribs is raised.
Owner:CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
Stenosis dilated catheter
ActiveCN107693921APass smoothlyAvoid shear damageBalloon catheterMulti-lumen catheterUrethraWhole body
Owner:JW ICU MEDICAL LTD
Bridge widening structure adopting corrugated steel sheet connecting parts and construction method thereof
ActiveCN106351132AAvoid shear damageEasy to useBridge erection/assemblyBridge strengtheningSheet steelHigh intensity
The invention relates to a bridge widening structure adopting corrugated steel sheet connecting parts and a construction method thereof. The bridge widening structure comprises a new bridge, an old bridge and a joint crack. The old bridge and the new bridge are transversely connected through the joint crack. The corrugated steel sheet connecting parts for connecting an edge beam flange plate of the old bridge and an edge beam flange plate of the new bridge are arranged in the joint crack. The corrugated steel sheet connecting parts comprise vertically-arranged corrugated steel sheets and bolts. The corrugated steel sheets are arranged between the edge beam flange plate of the old bridge and the edge beam flange plate of the new bridge and connected with the edge beam flange plate of the old bridge and the edge beam flange plate of the new bridge respectively through the bolts. Long-strip-shaped holes allowing the bolts to penetrate are formed in the straight sheet sections on the two sides of the corrugated steel sheets, and the bolts are friction type high strength bolts. According to the bridge widening structure, it can be guaranteed that longitudinal deformation of a main beam of the new bridge is not restrained by a main beam of the old bridge, transverse bridge direction bending deformation generated by the new bridge and the old bridge obtained after widening is reduced, shear failure of an old bridge support is avoided, and the use performance of the widened bridges is guaranteed; the construction period is shortened, and good economic benefits are achieved.
Owner:FUZHOU UNIV
Detachable steel beam-concrete filled steel tube column penetrating connection joint
PendingCN109881789AEasy to pourImprove assembly efficiencyBuilding constructionsSteel tubeMaterials science
The invention relates to a detachable steel beam-concrete filled steel tube column penetrating connection joint, which includes a concrete-filled steel tube column, H-shaped steel beams and a joint domain, a flange ring plate is arranged at one end of concrete-filled steel tube column, the joint domain comprises a steel pipe and a vertical connection plate communicating with the steel pipe, reinforcing ring plates are arranged on the upper part and the lower part of the steel pipe, the steel pipe, the vertical connection plate and the reinforcing ring plates are all fixed by welding, the steelpipe is poured with ultra-high performance concrete, the flange ring plate is connected with the reinforcing ring plates, and the four H-shaped steel beams are fixed to the joint domain in the shapeof a cross. According to the detachable steel beam-concrete filled steel tube column penetrating connection joint, all components adopt prefabricated connection, the workload of field welding and formwork consumption are significantly reduced, and the construction efficiency is greatly improved; and meanwhile, due to the fact that only bolts and a small amount of anchor bolts are used for connection, after the mission of an original building is completed, the components can be quickly disassembled and reused in a new building, and a more thorough green building structure concept is reflected.
Owner:SOUTH CHINA UNIV OF TECH
Fodder thrower
InactiveCN1820590AControl outputAvoid shear damageAnimal feeding devicesPisciculture and aquariaEngineeringFodder
The fodder thrower as one cultivation machine includes a casing, a fodder bin fixed inside the casing and with fodder outlet in the bottom, a fodder discharging board set below the fodder outlet and supported with several elastic supports, and a vibrator installed on the fodder discharging board. The casing has through hole in the front part for the front end of the fodder discharging board to stretch beyond the casing, and on the casing wall below the through hole, a fodder distributing motor is fixed and a fodder distributing pan is installed onto the fodder distributing motor and in the position corresponding to the front end of the fodder discharging board. The fodder thrower is used in pond cultivation and has the advantages of easy control of the discharged fodder amount, high utilization rate of fodder and convenient use.
Owner:莫洪林
Well structure for delaying casing damage on fault
The invention discloses a well structure for delaying casing damage on a fault. According to the structure, the well cementation is not performed on sections 30m above and below a drill-in breakpoint, and the broaching is performed in a drilling manner, so that a gap between a casing and the stratum reaches 120mm, and a buffer zone is reserved for the motion of the stratum along the fault so as to prevent the casing from being damaged by shear. According to the technical scheme, the gap between the casing and the stratum reaches 120mm, and the buffer zone is reserved for the motion of the stratum along the fault so as to prevent the casing from being damaged by shear.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA) +2
Flexible juncture net cage frame
InactiveCN1271925CImprove the force characteristicsImprove wind and wave resistanceClimate change adaptationPisciculture and aquariaStress concentrationEngineering
The present invention provides a flexible connected net cage frame, it includes main floating tube, main floating tube three-way, guard bar tube, guard bar tube three-way and guard bar upright column tube. It is characterized by that the described main floating tube at least has four independent vertical main floating tubes which are head-to-tail successively movably connected together by means of connecting components, and can be relatively moved between them to form polygon net cage frame having at least four sides, and every side can be independently moved with wave so as to raise its capability for resisting wave.
Owner:YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
Bridge deck pavement method for orthotropic steel bridge
ActiveCN104652270AImprove pull strengthGood deformabilityIn situ pavingsBridge structural detailsEpoxyFull life cycle
The invention discloses a bridge deck pavement method for an orthotropic steel bridge. The pavement method comprises the following steps: (1) performing sand-blasting and de-rusting treatment on a steel bridge panel, and coating a mica-containing epoxy anti-corrosion layer; (2) coating a solvent-free epoxy resin water-proof layer; (3) spreading a hot melt particle bonding layer which is partially sunken into the solvent-free epoxy resin water-proof layer, wherein the hot melt particles are high-polymer particles of which the softening point is greater than 150 DEG C; (4) paving a fine-particle asphalt mixture to form a high-elasticity modified asphalt pavement lower layer; (5) spreading a modified emulsified asphalt bonding layer; (6) paving a fine-particle or medium-particle asphalt mixture to form a high-elasticity modified asphalt pavement upper layer. By adopting the pavement method, the construction difficulty is lowered greatly, later maintenance is easy, the universality is high, a pavement lower structure is durable and long in service life, only the surface needs to be maintained in daily use, overall repeated maintenance is avoided, and the investment in a full life cycle is lowered.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
Assembled frame system with concrete filled steel tube branch limb combined special-shaped column and shock absorption wall
ActiveCN109372186AImprove seismic performanceFlexible layoutStrutsWallsEarthquake resistanceReinforced concrete
The invention discloses an assembled frame system with a concrete filled steel tube branch limb combined special-shaped column and a shock absorption wall and belongs to the field of building structure techniques and earthquake resistance and shock absorption of structures. The system primarily comprises a round concrete filled steel tube long column welded steel batten plate, and a prefabricatedcorner column, a prefabricated side column, a prefabricated middle column, a reinforced concrete beam, a steel plate wall, a prefabricated steel floorslab, a column-column connecting sleeve, a column-beam anchoring part, a middle column-beam anchoring part, a beam-plate connecting part, ECC post-cast strips and the like prepared by pouring concrete outside. Upper and lower concrete filled steel tubes are connected through the column-column connecting sleeve, and the column-beam anchoring part, the middle column-beam anchoring part and the round concrete filled steel tube long column are connected and prefabricated through dowels, so that the beam-column node connecting performance is enhanced. The ECC post-cast strips are arranged at two ends of the beam and the wall and are poured up anddown in a penetrating manner, so that the energy consumption ability and the anti-earthquake performance of the structural system are improved. The assembled frame system achieves the functions of hiding column edges and being attractive in building, a project is simple and rapid to construct, the construction efficiency is high, the nodes are connected stably and reliably, and the structural system is good in anti-earthquake performance.
Owner:BEIJING UNIV OF TECH
Variable-damping variable-rigidity viscoelasticity-friction composite damping device
ActiveCN111350291AImproved dissipation capacityReduce vibration responseProtective buildings/sheltersShock proofingViscoelastic dampingShock absorber
The invention discloses a variable-damping variable-rigidity viscoelasticity-friction composite damping device. The variable-damping variable-rigidity viscoelasticity-friction composite damping devicecomprises two symmetric cylinder type viscoelasticity damping device units and two cylinder type friction damping device units, the friction damping device units sleeve the outer sides of the cylinder type viscoelasticity damping device units, the cylinder type viscoelasticity damping device units sequentially comprise annular inner steel cylinders, annular viscoelasticity material layers and annular middle steel cylinders from inside to outside, elastic elements are sleeved with the middles of the annular inner steel cylinders, closed steel plates are mounted on two ends of the annular innersteel cylinders, cylinder viscoelasticity materials are mounted on inner sides of two ends of the annular middle steel cylinders, connecting anchorage steel plates are mounted on two ends of the annular middle steel cylinders, the friction damping device units sequentially comprise annular middle steel cylinders, annular friction pieces, annular friction plates and annular outer steel cylinders from inside to outside, the annular friction plates comprise first annular friction plates and second annular friction plates, and each annular outer steel cylinder is formed through connecting of an upper half annular outer steel cylinder and a lower half annular outer steel cylinder through bolt assembling.
Owner:HUBEI UNIV OF ARTS & SCI
Test method for poisson ratio of continuous fiber enhanced resin-based composite material
ActiveCN104807698ASolve the chirp optical signal phenomenonSolve attenuationPreparing sample for investigationMaterial strength using tensile/compressive forcesManufacturing technologyFiber Bragg grating
The invention discloses a test method for a poisson ratio of a continuous fiber enhanced resin-based composite material. The test method has the advantages that (1) the shortcomings of the existing composite material poisson ratio test technology are overcome, and a novel FBG test method for the poisson ratio of the composite material is provided based on a fiber Bragg grating string technology; (2) the problem that a test piece is low in surface quality, non-uniform in thickness, non-uniform in width, low in parallelism and the like caused by the conventional composite material test piece vacuum bag and thermal pressing tank manufacturing technology is solved, a manufacturing technology for a continuous fiber enhanced resin-based composite material standard test piece is provided based on a closed type thermal die pressing technology, and the problem of separation of the composite material standard test piece with the built-in fiber Bragg grating string from a rigid closed type die is focused to be solved, and convenient, precise and effective test on the poisson ratio of the composite material is realized.
Owner:SHANDONG UNIV
Hollow-sandwich multi-cavity steel pipe concrete member and preparation method thereof
PendingCN109403205ASolve the rustLow maintenanceStrutsBridge structural detailsClamp connectionStressed state
The invention discloses a hollow-sandwich multi-cavity steel pipe concrete member and a preparation method thereof. The hollow-sandwich multi-cavity steel pipe concrete member comprises an internal steel pipe and an external steel pipe which are concentrically placed; a space between the internal steel pipe and the external steel pipe is filled with concrete; a plurality of transverse diaphragms are uniformly distributed on the external wall of the internal steel pipe around the axis of the internal steel pipe; each transverse diaphragm is placed along the full length of the internal steel pipe in the axial direction; the external end part of each transverse diaphragm is in clamping connection with a groove formed in the internal wall of the external steel pipe; convex teeth are arranged on the internal wall of the external steel pipe and the external wall of the internal steel pipe; a plurality of shear grooves are uniformly formed in the side surfaces of the transverse diaphragms inthe axial direction; a plurality of external cylinders made of carbon fiber composite materials are bonded outside the external steel pipe in the annular direction; and the external cylinders are notconnected with the end part of the external steel pipe. According to the hollow-sandwich multi-cavity steel pipe concrete member, the corrosion resistance is high, less separation phenomena between the steel pipe walls and the concrete are less, the steel pipes are unlikely to generate local buckling, and the stressed states of the concrete in three directions are uniform.
Owner:CENT SOUTH UNIV
Composite material shear key for steel-concrete combined structure
ActiveCN104389266APrevent peelingAvoid shear damageBridge structural detailsBridge materialsFiberGrating
The invention discloses a composite material shear key for a steel-concrete combined structure. The composite material shear key comprises a steel plate, a fiber grating, steel blocks and concrete, wherein the fiber grating is glued on the steel plate; the steel blocks are arranged in grids of the fiber grating and are connected to the surface of the steel plate; the steel blocks are arranged in the fiber grating along the edge, or are in plum blossom-shaped arrangement or are uniformly arranged; the concrete is poured on the fiber grating; the steel blocks are steel blocks with flanges or steel blocks without flanges; the steel blocks are in glued connection or mechanical connection; the mechanical connection is that bolts are welded on the steel plates; the steel blocks sleeve the bolts through preserved holes and are fixed by screw caps of which the diameters are greater than the diameters of the preserved holes. According to the composite material shear key for the steel-concrete combined structure, peeling between the grating and the steel blocks and shearing damage are effectively prevented, and the shear strength of the steel-concrete combined structure is greatly enhanced; the composite material shear key is suitable for building of various steel bridgedeck structures.
Owner:NANJING UNIV OF TECH
Anchor cable made of continuous basalt fiber composite rib material
The invention relates to an anchor cable made of a continuous basalt fiber composite rib material. The anchor cable comprises a grouting pipe (1), a steel strand (6), a prestress appplying anchor device, a continuous basalt fiber composite rib bundle (2), a flange connection structure and a PVC pipe (12). The anchor cable connects the continuous basalt fiber composite rib bundle with the steel strand together via the flange connection structure and the prestress appplying anchor device. The continuous basalt fiber composite rib bundle is installed in the PVC pipe by a plurality of uniformly distributed positioning centralizers (3). A section of anchoring slurry injection pipe is embedded in the grouting pipe, and anchoring slurry flows into the flange from the pipe to tightly connect the continuous basalt fiber composite rib bundle and the steel strand. The anchor cable made of the continuous basalt fiber composite rib material can replace steel strands, high-strength steel wires and the like to become a main tensile rib material; while tensile strength is met, lower shear strength is provided, and thus, residual anchor cable steel in the soil layer can be easily cut during later construction of surrounding projects.
Owner:EAST CHINA JIAOTONG UNIVERSITY
Female-only catheter
The invention discloses a female-only catheter. The catheter comprises main pipelines of an inner surface and an outer surface, and further comprises an external urethral orifice fixing component in which a top end of the head of the catheter can be at least arranged in a sleeved mode, a flexible urethral guiding component, a catheter driving component which is connected with a cylindrical main body of the external urethral orifice fixing component in a sleeving mode, a hydrophobic flow stopping component on a urine outlet of the catheter and spatialized structures, such as thin segments, pump pipes and tubular beds, which conduct expanding operations on narrow urethral areas. According to the female-only catheter, not only are drawbacks of a traditional mode of undirected dangling placement eliminated by a safe mode of directed approaching placement, and is pollution of urethral orifice surrounding tissues to the catheter avoided completely, but also urethral intimal injury caused by narrow urethra in a placement process is avoided furthest; the pollution of flowed urine to a catheter outlet is avoided; blockages of blood clots and tissue masses in a urinary bladder to a urine inlet during retention are removed effectively, and the female-only catheter is matched with a special peristaltic pump so that residual urine volume can be reduced to the lowest.
Owner:JW ICU MEDICAL LTD
Square coaxial sealing element
The invention discloses a square coaxial sealing element. The square coaxial sealing element comprises a square ring and an O-shaped ring, the O-shaped ring is arranged on the inner side of the square ring, and chamfers are mounted on two sides of an outer circle of the square ring respectively. According to the square coaxial sealing element, the chamfers are added on the two sides of the outer circle of the square ring respectively, a certain guiding function can be achieved when the square coaxial sealing element is installed, the square coaxial sealing element is prevented from being sheared and damaged by a cylinder body during installation, and during usage, a sealing ring is not prone to be squeezed out from a gap between the cylinder body and a piston. Besides, oil guide grooves are added on two axial end faces of the square ring, inertia and lag of the square coaxial sealing element due to rapidly starting of a hydraulic oil cylinder can be well prevented, hydraulic oil can rapidly and effectively enter into a piston groove to force the O-shaped ring to rapidly deform, and thereby the sealing performance is guaranteed. The square coaxial sealing element is simple in structure, small in required installing space and convenient to install.
Owner:TAICANG MINGYUSL
Hollow mesoporous carbon nanosphere immobilized enzyme and preparation method thereof
ActiveCN107760668AIncrease loading capacityImprove stabilityOn/in inorganic carrierSilicon dioxideMesoporous carbon
The invention discloses hollow mesoporous carbon nanosphere immobilized enzyme and a preparation method thereof. The hollow mesoporous carbon nanosphere immobilized enzyme comprises enzyme and a hollow mesoporous carbon nanosphere acting as a carrier for immobilizing the enzyme, wherein for the hollow mesoporous carbon nanosphere, the particle diameter is 300-400nm, the specific surface area is 1100-1200m<2> / g, the shell thickness is 20-60nm, the cavity size is 250-350nm, and the aperture size of mesopore is 8-14nm. The preparation method comprises the following steps: (1) preparing silicon dioxide / resorcinol-formaldehyde oligomer (SiO@RF); (2) preparing silicon dioxide / carbon (SiO2@C); (3) preparing the hollow mesoporous carbon nanosphere; and (4) immobilizing the enzyme on the hollow mesoporous carbon nanosphere. The hollow mesoporous carbon nanosphere immobilized enzyme has the advantages of greatly improving the loading capacity and stability of enzyme due to the physical structureand hydrophobic surface, being beneficial to exposing the active site of enzyme, and being more beneficial to adsorbent immobilization and activity retention of enzyme compared with common adsorbingmaterials.
Owner:INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
Viscous, elastic and anti-buckling brace combined damper
ActiveCN106812226AImprove energy consumptionImprove fatigue performanceProtective buildings/sheltersShock proofingVulcanizationMetallurgy
The invention discloses a viscous, elastic and anti-buckling brace combined damper. The damper sequentially comprises a steel plate in the center, an annular inner steel cylinder and an annular outer steel cylinder from inside to outside, the steel plate is sleeved with the annular inner steel cylinder, the annular inner steel cylinder is sleeved with the annular outer steel cylinder, the portion between the annular inner steel cylinder and the annular outer steel cylinder is filled with a viscous and elastic material layer, and the annular inner steel cylinder, the viscous and elastic material layer and the annular outer steel cylinder are connected in a high-temperature high-pressure vulcanization mode. The damper further comprises an upper anchoring plate and a lower anchoring plate which are opposite to each other. The steel plate is composed of an upper end, a buckling section and a lower end, two grooves I are symmetrically formed in the upper end in the horizontal direction, the upper anchoring plate is fixedly embedded in the grooves I, two grooves II are symmetrically formed in the lower end in the horizontal direction, the lower anchoring plate is embedded in the grooves II, the lower anchoring plate can slide up and down in the grooves II relative to the grooves II, the annular outer steel cylinder is fixedly connected with the lower anchoring plate, and the annular inner steel cylinder is fixedly connected with the upper anchoring plate. The diameter of the annular inner steel cylinder is 1-3 mm larger than the horizontal length of the steel plate.
Owner:SOUTHEAST UNIV +1
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