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30 results about "Plastic yielding" patented technology
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Plastic yield. plastic flow, plastic deformation. The deformation of a plastic material beyond the point of recovery, accompanied by continuing deformation with no further increase in stress; results in a permanent change in shape.
Coupled shearing force wall energy-dissipation beam-coupled steel plate damper and its using method
InactiveCN101173535AReduce the difficulty of reinforcementReduce the difficulty of structural designShock proofingPlastic yieldingWhole body
The invention discloses a damper and the application method, in particular to a braced shear wall coupling beam energy dissipating damper and the application method. The damper comprises a mutual connection plastic yield energy dissipating work area and a keeping approximate rigidity partial fixing area, two or more than two column strip-shaped holes are arranged in work area; non-sharp corner processing is adopted at the upper ends of the strip-shaped hole. The application method of the damper for shear wall coupling beam energy dissipating comprises: the reinforced concrete coupling beam is replaced by one or more than one damper; or one or more damper is adhered to the reinforced concrete coupling beam and is positioned at the coupling beam of the shear wall. Each damper work area is provided with anti out-plane instability bolt to prevent the out-plane of each damper from instability; each damper partial fixing area is pre-stretched by high strength bolt, or each damper is welded into a whole body by cap cover plate.
Owner:滕军
Three-dimensional lattice material based on electron beam selective melting technology and preparation method of three-dimensional lattice material based on electron beam selective melting technology
ActiveCN106041084ASuit one's needsSmall sizeAdditive manufacturingIncreasing energy efficiencyTitaniumPlastic yielding
The invention provides a three-dimensional lattice material based on an electron beam selective melting technology. The three-dimensional lattice material comprises a three-dimensional structure made of pure titanium or titanium alloy and formed by superposition of a plurality of basic units, every basic unit consists of a plurality of isosceles triangles with vertexes coinciding, solid rods serve as the waists of every isosceles triangle, the rest portions of the isosceles triangles are virtual, and every two adjacent isosceles triangles coincide by one of their own waists. The invention further provides a preparation method of the three-dimensional lattice material. The three-dimensional lattice material based on the electron beam selective melting technology is mainly formed by superposition of the basic units, attains stable compression performance after being subjected to electron beam selective melting molding, vacuum annealing and chemical corrosion and shows an obvious plastic yielding platform shape in compression curve, thereby providing stable and reliable computing bases for structure designers.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Elastoplastic-damage finite-element algorithm of considering elastoplasticity and damage coupling of composite material
ActiveCN108416084APredicting Elastic-Plastic Damage Coupled BehaviorMaterial strength using tensile/compressive forcesDesign optimisation/simulationFinite element algorithmPlastic yielding
The invention discloses an elastoplastic-damage finite-element algorithm of considering elastoplasticity and damage coupling of a composite material, and belongs to the field of finite-element analysis of mechanical properties of composite materials. On the basis of a model of carrying out solving of elastoplastic damage of composite materials on the basis of a backward Euler integral rule and Newton iteration, softening influences which are of damage state quantity in a previous incremental step and on current stress are all considered when solving of elastic stress is carried out in initialsolving of trial stress and plastic yielding iteration, thus damage degradation action is considered in an elastoplasticity solving process, and an interaction relationship between plastic behaviors and the damage of the resin matrix composite-material under complex loading conditions is more truly reflected. The algorithm can effectively describe a coupling action relationship between the elastoplasticity and the damage of resin matrix composite-material, and can be applied to the technical fields of scientific research and engineering such as development of elastoplastic-damage constitutive-models of the composite materials in finite-element software, research of mechanical properties of novel resin matrix composite-materials and related refined modeling analysis of engineering structures of the composite materials.
Owner:NANJING UNIV OF SCI & TECH
Orthopedic foot splint with an optional posterior strut and cuff
InactiveUS20070016122A1Easy to change clothIncrease the number ofRestraining devicesNon-surgical orthopedic devicesPlastic yieldingEngineering
A flexible orthopedic foot splint comprising two shoes containing screw receptacles in the soles; a bar contains one or more small apertures for connecting the shoes to the bar; two or more screws which fit through the apertures on the bar and attaches said bar to the shoes via said screw receptacles in the soles of said shoes; a posterior strut attachment that distally connects to the bar and one shoe via said screw receptacles; half circular cuffs attach to the strut attachment and wrap around an infants calf; said cuff is securely held to the leg via a hook and loop fastener wherein said bar is made of a low modulus plastic yielding great flexibility upon the application of force. With the orthopedic foot splint of the present invention, when a child attempts to stretch and pull his foot into plantarflexion and adduction the present invention allows some motion but limits excessive motion and then springs the foot back into the corrected alignment. As a result of the allowed motion the heel is not forced upwards in the shoe and the risk of the foot pulling out of the shoe diminished.
Owner:BOWMAN GERALD DAVID
Support method of sharp inclined seam roadway
InactiveCN103899333AEnsure safetyGuaranteed smooth progressUnderground chambersTunnel liningPlastic yieldingLap joint
The invention discloses a support method of a sharp inclined seam roadway. The support method includes the steps that firstly, anchor bolt support is performed, when the roadway is excavated, tunnel face dangerous rocks are removed, an anchor rod installation position is arranged in the direction perpendicular to the inclination of a seam, drilling is performed in the radial direction of the roadway with a drilling machine, and an anchor rod is installed; secondly, spraying net support is performed, a reinforcing mesh is hung on the periphery of a roadway hole and is firmly welded to the anchor rod and an anchor cable; thirdly, roadway bottom arch anchor spraying mesh support is performed, after a bottom arch is excavated according to a designed section, the reinforcing mesh is hung again, and whitewashing support is performed; fourthly, U-shaped steel closing and looping support is performed, U-shaped steel is closed to form a loop, the bottom-body-top mounting sequence is adopted, four pieces of U-shaped steel are symmetrically installed and connected into the loop, and the bottom U-shaped steel and the body U-shaped steel are in lap joint and controlled at the arch waist part; fifthly, base plate backfilling is performed, after backfilling, the base plate is flat, the front gradient and the rear gradient are consistent, and a rail is firmly padded and cannot be suspended. The support method of the sharp inclined seam roadway is simple and convenient to conduct, operation is simple, the effect is obvious, and cost is low. A support structure is safe and reliable, generated surrounding rock plastic yielding area is reduced by more than 70 percent or more compared with a conventional support, and long-term safety and stability of the roadway support structure are ensured.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
Method for efficiently and accurately predicting laminated wood beam ultimate bending moment used for FRP (Fiber Reinforced Plastic) enhancement structure
InactiveCN104915572AQuick measurementAccurate measurementSpecial data processing applicationsFiberMaterial resources
The invention discloses a method for efficiently and accurately predicting a laminated wood beam ultimate bending moment used for an FRP (Fiber Reinforced Plastic) enhancement structure. The method can judge whether a compression resistance area of a beam body is subjected to plastic yield or not through a strain distribution or stress distribution diagram of the section of the beam body and also can carry out the fine tuning of an interpolation position of a neutral axis through judging whether the tensile stress resultant force and the compression stress resultant force of the bending compression resistance area of the beam body meet a static determinacy balance condition so as to calculate the ultimate bending moment borne on the beam body during bending damage failure according to a real position coordinate of the central axis. On one hand, manpower and material resource consumption in an actual measurement process of a traditional method can be saved, and errors generated in a measurement process are eliminated; and on the other hand, a complex calculation process of the traditional method can be saved so as to realize the quick and accurate measurement of the laminated wood beam ultimate bending moment used for the FRP enhancement structure.
Owner:BEIJING FORESTRY UNIVERSITY
Tough oil well cement
InactiveCN106278003AStrong ability to change laterallyLow elastic modulusSolid waste managementFiberPlastic yielding
The invention discloses tough oil well cement. The cement is characterized by being prepared from components in parts by weight as follows: 100 parts of cement, 1-15 parts of active filler, 1-5 parts of a toughening material, 0.01-0.05 parts of staple fibers, 1-5 parts of an additive, 0.1-0.2 parts of a water educing agent, 1-5 parts of a fluid loss agent, 1-2 parts of an antifoaming agent and 1-5 parts of a retarder. An oil well cement sheath is high in lateral deformation capacity, low in elasticity modulus, high in plastic yielding point and good in elasticity; the oil well cement ring has very high ultimate strain value, can absorb larger impact energy and greatly improves the deformation performance of set cement compared with raw slurry, so that the requirement for cement performance in the oil and gas well development process is met, and cementing quality and follow-up development are guaranteed.
Owner:JIAHUA SPECIAL CEMENT
Layered pressure regulating submersible and manufacturing method thereof
InactiveCN105947153AReduce stress levelsLow manufacturing process requirementsUnderwater vesselsUnderwater equipmentPlastic yieldingStress level
The invention discloses a layered pressure regulating submersible. The layered pressure regulating submersible can lower the requirement for the preparation process of a shell, remarkably reduces the stress level of the shell, and increases the plastic yielding security coefficient of a compressive cabin, thereby effectively prolonging the fatigue life. According to the layered pressure regulating submersible, the pressure outside the submersible is less than or equal to 120 MPa, and the pressure in the submersible is 0.1 MPa. The layered pressure regulating submersible comprises n layers of spherical shells, and n is an integer greater than one. The spherical shells have the same spherical center, and partial pressure objects filled with specified pressure are arranged in spaces between every two adjacent spherical shells. The invention further provided a manufacturing method of the layered pressure regulating submersible.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI
High-strength stainless steel for storage equipment
The invention discloses high-strength stainless steel for storage equipment. The steel plate comprises, by mass, 0.02-0.04% of C, 11.6-11.9% of Cr, 0.25-0.29% of Si, 0.52-0.63% of Mn, 0.45-0.52% of Ni, 0.15-0.17% of Re, 0.45-0.62% of Zr, 0.017-0.018% of Al, 0.11-0.13% of Y, 0.23-0.31% of Rh, 0.13-0.15% of Ti, 0.75-0.77% of Ca, 0.11-0.13% of B, 0.36-0.41% of W, 0.32-0.35% of Cd, 0.23-0.31% of Mo, 0-0.03% of S, 0-0.02% of P, 0.13-0.26% of rare earth metal, and the balance Fe. The steel plate has excellent transverse yield strength and high plasticity, the yield strength is no less than 450 MPa, the tensile strength is no less than 610 MPa, the steel plate is suitable for the weld heat input of 150-250 kJ / cm, and under the condition of high heat input welding of 150-250 kJ / cm, the average impact power of the HAZ of the steel plate at -40 DEG C is 180 J or over.
Owner:SUZHOU KESHENG STORAGE & LOGISTICS EQUIP
Board for pegboard system
This pegboard is injection molded of plastic yielding a unitized flat panel, and rearwardly projecting peripheral flanges and cross webs terminating along a single plane, suited to provide clearance for a cooperating hook between a panel rear face and a flat mounting surface. The pegboard has rows and columns of holes of both nominal ⅛ inch and ¼ inch diameters on one inch centers, to accommodate both conventional nominal size hooks. The respective rows and columns of the different size holes are alternately arranged offset from one another vertically and horizontally, allowing either size hook mounting virtually anywhere on the panel. Locating structures on the rear side of the pegboards provide accurate back to back squared registry positioning of two like pegboards, for cool-down after molding without shape distortion and for stable twin-pack packaging for retail sales.
Owner:CENCOR PLASTICS
Multi-point yield energy dissipating type mild steel energy dissipater
InactiveCN105952018AImprove stress concentration effectImprove plastic deformation abilityProtective buildings/sheltersShock proofingIn planeStress concentration
The invention relates to a multi-point yield energy dissipating type mild steel energy dissipater. The multi-point yield energy dissipating type mild steel energy dissipater mainly comprises a top plate, an energy dissipating plate, a bottom plate and a connecting plate, wherein the energy dissipating plate is arranged between the top plate and the bottom plate; the connecting plate is arranged on the lower surface of the bottom plate; the energy dissipating plate is formed by arranging a plurality of energy dissipating units in an in-plane manner. The multi-point yield energy dissipating type mild steel energy dissipater has the advantages that by adopting the in-plane bending yield stress type, the enough initial rigidity is provided under the action of small earthquake, the energy inputted by the earthquake is dissipated under the action of large earthquake, and a main body structure is protected; each energy dissipating unit is in a symmetric circular arc shape, a plurality of plastic yield points can be formed under the action of the earthquake, the stress is redistributed, the stress concentration effect is effectively improved, and the plastic deformation capability and low-cycle fatigue property are improved; the ductility is good, the structure is simple, the replacement is convenient, the energy dissipating property is good, and an excellent energy dissipating and earthquake-proof member is provided.
Owner:TIANHUA ARCHITECTURE DESIGN COMPANY
Steel plate special for cable bridge and thermal treatment method for steel plate
InactiveCN105256248AGood transverse yield strengthImprove corrosion resistanceRare-earth elementPlastic yielding
The invention discloses a steel plate special for a cable bridge. The steel plate comprises, by mass, 0.52%-0.66% of C, 3.48%-3.70% of Cr, 0.16%-0.35% of Si, 0.85%-1.50% of Mn, 0-0.015% of P, 0.020%-0.050% of Nb, 0.008%-0.020% of Ti, 0.25%-0.65% of V, 0.11%-0.18% of Mo, 0.15%-0.35% of Al, 0.03%-0.07% of Cu, 0.80%-0.87% of Ni, 1.15%-2.35% of rare earth elements, and the balance Fe and inevitable impurities. The produced high-strength and corrosion-resistant steel plate special for the cable bridge has good transverse yield strength and high plasticity; the yield strength is 1060-1180 MPa, the tensile strength is 1120-1180 MPa, the ductility is 18%-25%, and minus 40 DEG C low-temperature impact energy is larger than or equal to 75 J.
Owner:江苏宇恒电气有限公司
A Supporting Method for Steeply Inclined Coal Seam Roadway
InactiveCN103899333BEnsure safetyGuaranteed smooth progressUnderground chambersTunnel liningPlastic yieldingMesh reinforcement
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and using method thereof
The invention discloses a broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and a using method thereof, and belongs to the technical field of underground engineering supporting. The broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device comprises an elastic yielding assembly, a plastic yielding assembly and a reinforced anchoring structure, wherein the elastic yielding assembly is composed of a metal tray, positioning rods, annular vulcanized rubber air bags, metal isolation pieces and a limiting plate; the plastic yielding assembly is composed of a porous metal disc, a necking round rod and a high-strength porous extrusion plate; and the reinforced anchoring structure is composed of a hollow grouting anchor rod, a resistance increasing pawl sleeve and the like. The hollow grouting anchor rod and the resistance increasing pawl sleeve can effectively improve the anchoring strength and improve the mechanical property of the coal and rock mass, and when the coal and rock mass deforms, through coordinated work of the elastic yielding assembly and the plastic yielding assembly, good large-deformation yielding work efficiency is achieved, the anchor rod is effectively prevented from being broken due to overload, and the stability and the use safety of the coal rock mass and the supporting structure are maintained, the supporting requirement of the deep high-stress broken coal roadway is met, and the anchor rod anchoring device has the advantages of high anchoring strength, constant-resistance yielding, reasonable structure and the like.
Owner:内蒙古双欣矿业有限公司 +1
A metal material plastic yield strength testing device
ActiveCN113310813BStable clampingGuaranteed accuracyMaterial strength using tensile/compressive forcesPlastic yieldingMetallic materials
Owner:上海市紧固件和焊接材料技术研究所有限公司
Glass fiber irregular architecture sandwiched material as well as preparation method thereof
ActiveCN103978749ASimple manufacturing processNo more brokenLamination ancillary operationsLaminationGlass fiberPlastic yielding
The invention relates to a glass fiber irregular architecture sandwiched material as well as a preparation method thereof. The glass fiber irregular architecture sandwiched material is composed of an upper panel (1), a lower panel (3) and a chopped glass fiber bundle core material (2) with an irregular architecture; the chopped glass fiber bundle core material (2) with the irregular architecture forms an irregular polyhedral hollow structure by mutually overlapping chopped glass fiber bundles (4) at different angles and is fixedly connected with the upper panel (1) and the lower panel (3). The glass fiber irregular architecture sandwiched material provided by the invention cannot generate plastic yielding in a flat pressing loading process; the glass fiber irregular architecture sandwiched material without plastic yielding changes the common properties of the traditional sandwiched material, and overcomes the weakness that the traditional core material is rapidly collapsed and damaged; the preparation technology is simpler and more feasible.
Owner:NANJING UNIV OF TECH
Cement sheath integrity analysis and prediction method and device
ActiveCN106991235BAccurately reflectIncrease reflectionGeometric CADDesign optimisation/simulationPlastic yieldingWell cementing
The invention provides a well cementation cement sheath integrity analysis and forecast method and device. The method comprises the steps that under a homogeneous crustal stress field, and based on the elastic thick wall cylinder theory and Mohr-Coulomb plastic yield guidelines respectively, the stress distribution and the displacement distribution of an elastic area of the well pitshaft and the stress distribution and the displacement distribution of the plasticity of the pitshaft area are calculated and obtained, the pitshaft area comprises a casing pipe, a cement ring and the surrounding rocks distributed from the inside to the outside; the stress distribution and the displacement distribution of the well pitshaft under the inhomogeneous stress field using the Airy stress function are calculated and obtained, the homogeneous stress field and inhomogeneous stress field are linearly overlaid and the result is the original stress field; the stress distribution and the displacement distribution of the pitshaft plastic area, and the stress distribution and displacement distribution of the pitshaft under the inhomogeneous stress field are utilized and linearly super-imposed to obtain the total stress distribution and displacement distribution in the pitshaft, which is used for the analysis and forecasting of cement sheath integrity. The well cementation cement sheath integrity analysis and forecast method and device take into account the cement sheath elastic plasticity, to reflect the work conditions of the real well bottom.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
A kind of medium temperature deformation nano austenite reinforced plasticized steel and preparation method thereof
The invention provides a medium temperature deformation nanometer austenite enhanced plasticized steel and a preparation method thereof, belonging to the technical field of high-strength high-plasticity automobile steel sheet materials, section bars and rods and wires. The steel comprises the following chemical components by mass: 0.03 to 0.39 wt% of C, 2.0 to 9.0 wt% of Mn, 0 to 2.0 wt% of Al, 0 to 2.0 wt% of Si, 0 to 2.0 wt% of Cr, no more than 0.020 wt% of P and no more than 0.02 wt% of S, with the balance being Fe and unavoidable impurities. The steel may further comprise one or more elements selected from the group consisting of 0.1 to 3.0 wt% of Ni, 0.1 to 0.8 wt% of Mo, 0.5 to 2.0 wt% of Cu, 0.0005 to 0.005 wt% of B, 0.02 to 0.10 wt% of Nb, 0.002 to 0.25 wt% of N, 0.05 to 0.25 wt% of Ti, 0.02 to 0.25 wt% of V, 0.002 to 0.005 wt% of RE and 0.005 to 0.03 wt% of Ca. The invention has the following advantages: sizes of austenite and ferrite of the steel are in a range of 50 to 250 nm; low cost, easy production, high strength and high plasticity are realized; the steel has yield strength of 0.6 to 1.3 GPa, tensile strength of 1.0 to 1.5 GPa and plasticity of 20 to 50% and has good low-temperature toughness.
Owner:CENT IRON & STEEL RES INST
Metal material plastic yield strength detection device
InactiveCN113514323AStable clampingGuaranteed accuracyStrength propertiesPlastic yieldingMetallic materials
The invention discloses a metal material plastic yield strength detection device which comprises a testing machine body, a lower cross beam is installed at the lower end of a support of the testing machine body, a lifting upper cross beam is arranged at the upper end of the support, and chuck mechanisms are fixedly installed in the middle of the upper surface of the lower cross beam and the middle of the lower surface of the lifting upper cross beam correspondingly. The chuck mechanism comprises an outer shell, mounting openings are formed in the two side walls of the upper end of the outer shell, a plurality of sliding rails are circumferentially and evenly arranged at the upper end of the inner wall of the outer shell, sliding fan-shaped clamping blocks are slidably mounted on the sliding rails, fan-shaped grooves are formed in the lower ends of the inner ends of the sliding fan-shaped clamping blocks, a vertically-arranged hydraulic telescopic rod is fixedly installed in the middle of the bottom end of the interior of the outer shell, and a lifting disc is fixedly installed at the top end of the hydraulic telescopic rod. According to the chuck mechanism, plate-shaped metal materials can be conveniently clamped, meanwhile, multipoint clamping and fixing can be conducted on columnar metal materials, clamping is firm, and using is convenient.
Owner:程名丰
Multi-directional connection steel beam-column joint based on dry method connection
ActiveCN113175259AImprove construction efficiencyReduce construction professionalismProtective buildings/sheltersShock proofingPlastic yieldingArchitectural engineering
The invention provides a multi-direction connection steel beam-column joint based on dry method connection. A beam-column joint core area is replaced with profile steel and serves as a connection joint of the beam-column joint, on-site splicing is carried out through bolts, the height of a prefabricated column can be effectively shortened, transportation and on-site rapid assembly are facilitated, the soft steel of the beam-column joint generates plastic yield hysteresis deformation to dissipate earthquake energy, so that the purposes of energy dissipation and shock absorption are achieved, and a plastic hinge is generated at a specified part to realize controllability and replaceability of the plastic hinge. According to the multi-direction connection steel beam-column joint based on dry method connection, the defect that formwork erecting, concrete cast-in-place and curing still need to be carried out on a construction site in current wet method operation is overcome, the construction efficiency is improved, formwork supports are reduced, and the economic benefits are improved.
Owner:SOUTHWEST JIAOTONG UNIV
Vibration deformation residual stress reduction device
PendingCN114231730AReduce residual stressResidual stress reduction and homogenizationProcess efficiency improvementPlastic yieldingEngineering
The invention relates to a vibration deformation residual stress reduction device, which comprises a vibration aging bracket, a vibration stress relief device, a vibration stress relief device and a vibration stress relief device, wherein a bracket for fixing a workpiece is arranged on the vibration stress relief bracket; the tension mechanism is fixed on the vibration aging bracket and is used for applying tension to the workpiece; and the excitation mechanism is arranged on one side of the vibration aging bracket and is used for carrying out aging vibration on the workpiece and reducing residual stress. A workpiece is fixed through the vibration aging bracket; the tension mechanism applies tension to the workpiece; and the excitation mechanism carries out aging vibration on the workpiece to reduce residual stress. Dynamic stress is transmitted through an excitation head installed on a vibration experiment table, when the internal stress of a material exceeds the yield strength of the material under the combined action of the residual stress of the component, the dynamic stress and applied tension, a high-stress area of the component can generate plastic yield, so that the residual stress is reduced and homogenized, and the yield strength of the component is improved. Compared with a traditional vibration aging process, the method has the advantages that the applied tension action is added, so that the residual stress reduction effect is more obvious.
Owner:UNIV OF SCI & TECH BEIJING
Metal material plastic yield strength testing device
ActiveCN110132743BEasy to detectEasy to holdMaterial strength using tensile/compressive forcesPlastic yieldingMaterials testing
The present invention relates to the field of material detection, and discloses a metal material plastic yield strength detection device, which includes a universal material testing machine. The universal material testing machine is provided with a sliding track, and a fixture is slidably connected to the sliding track through a sliding assembly. The sliding assembly includes a sliding block slidably connected on the sliding track, an adsorption block arranged on the fixture, the adsorption block and the sliding block attract each other, and a fixed block is arranged on the universal material testing machine. Blocks and snap blocks attract each other. The invention has the effect of facilitating the detection of metal materials.
Owner:深圳市华太检测有限公司
A glass fiber random structure sandwich material and its preparation method
ActiveCN103978749BSimple manufacturing processWeaknesses to Avoid Rapid Collapse DestructionLamination ancillary operationsLaminationGlass fiberFiber bundle
The invention relates to a glass fiber irregular architecture sandwiched material as well as a preparation method thereof. The glass fiber irregular architecture sandwiched material is composed of an upper panel (1), a lower panel (3) and a chopped glass fiber bundle core material (2) with an irregular architecture; the chopped glass fiber bundle core material (2) with the irregular architecture forms an irregular polyhedral hollow structure by mutually overlapping chopped glass fiber bundles (4) at different angles and is fixedly connected with the upper panel (1) and the lower panel (3). The glass fiber irregular architecture sandwiched material provided by the invention cannot generate plastic yielding in a flat pressing loading process; the glass fiber irregular architecture sandwiched material without plastic yielding changes the common properties of the traditional sandwiched material, and overcomes the weakness that the traditional core material is rapidly collapsed and damaged; the preparation technology is simpler and more feasible.
Owner:NANJING TECH UNIV
An efficient and accurate method for predicting the ultimate bending moment of glulam timber beams for frp reinforced structures
InactiveCN104915572BQuick measurementAccurate measurementSpecial data processing applicationsFiberMaterial resources
The invention discloses a method for efficiently and accurately predicting a laminated wood beam ultimate bending moment used for an FRP (Fiber Reinforced Plastic) enhancement structure. The method can judge whether a compression resistance area of a beam body is subjected to plastic yield or not through a strain distribution or stress distribution diagram of the section of the beam body and also can carry out the fine tuning of an interpolation position of a neutral axis through judging whether the tensile stress resultant force and the compression stress resultant force of the bending compression resistance area of the beam body meet a static determinacy balance condition so as to calculate the ultimate bending moment borne on the beam body during bending damage failure according to a real position coordinate of the central axis. On one hand, manpower and material resource consumption in an actual measurement process of a traditional method can be saved, and errors generated in a measurement process are eliminated; and on the other hand, a complex calculation process of the traditional method can be saved so as to realize the quick and accurate measurement of the laminated wood beam ultimate bending moment used for the FRP enhancement structure.
Owner:BEIJING FORESTRY UNIVERSITY
Coupled shearing force wall energy-dissipation beam-coupled steel plate damper and its using method
InactiveCN100595400CReduce the difficulty of reinforcementReduce the difficulty of structural designShock proofingPlastic yieldingWhole body
The invention discloses a damper and the application method, in particular to a braced shear wall coupling beam energy dissipating damper and the application method. The damper comprises a mutual connection plastic yield energy dissipating work area and a keeping approximate rigidity partial fixing area, two or more than two column strip-shaped holes are arranged in work area; non-sharp corner processing is adopted at the upper ends of the strip-shaped hole. The application method of the damper for shear wall coupling beam energy dissipating comprises: the reinforced concrete coupling beam isreplaced by one or more than one damper; or one or more damper is adhered to the reinforced concrete coupling beam and is positioned at the coupling beam of the shear wall. Each damper work area is provided with anti out-plane instability bolt to prevent the out-plane of each damper from instability; each damper partial fixing area is pre-stretched by high strength bolt, or each damper is welded into a whole body by cap cover plate.
Owner:滕军
Multidirectional connection of steel beam-column joints based on dry connection
ActiveCN113175259BImprove construction efficiencyReduce precisionProtective buildings/sheltersShock proofingPlastic yieldingArchitectural engineering
The invention provides a multi-directional connection of steel beam-column joints based on dry connection, the core area of the beam-column joints replaced by section steel is used as the connecting nodes of the beam-column joints, and the on-site splicing through bolts can effectively shorten the height of the prefabricated columns. It is convenient for transportation and quick assembly on site. The mild steel of the beam-column joint undergoes plastic yielding hysteretic deformation and dissipates seismic energy, so as to achieve the purpose of energy dissipation and shock absorption. replaceable. The beam-column joint of the invention overcomes the shortcomings of the current wet method operation on the construction site that still requires formwork, cast-in-place concrete, and maintenance, improves construction efficiency, reduces formwork supports and improves economic benefits.
Owner:SOUTHWEST JIAOTONG UNIV
Box-shaped steel piers with embedded energy-dissipating shell plates
ActiveCN103774550BLower yield strengthYield strain is smallBridge structural detailsBridge materialsPlastic yieldingSheet steel
The invention discloses a box-shaped steel pier with embedded energy consumption shell plates. The box-shaped steel pier with the embedded energy consumption shell plates comprises a box-shaped steel pier body and a transverse separation plate. The lower portion of the box-shaped steel pier body is provided with a root separation chamber. The box-shaped steel pier with the embedded energy consumption shell plates further comprises a bottom plate welded to the lower end of the box-shaped steel pier body, the four corners in the root separation chamber are respectively provided with one energy consumption shell plate, each energy consumption shell plate is a low-yield-point steel plate, the yield strength of each low-yield-point steel plate is 100 MPa or 160 MPa or 225 MPa, the upper ends of the energy consumption shell plates are welded to the transverse separation plate, the lower ends of the energy consumption shell plates are welded to the bottom plate, the two sides of each energy consumption shell plate are welded to the corresponding two side walls of the box-shaped steel pier body, and through holes are formed in the transverse separation plate. The box-shaped steel pier with the embedded energy consumption shell plates has the advantages that when the embedded energy consumption shell plates receive pressure, the energy consumption shell plates are buckled outwards, deformed and limited by the side walls of the pier, buckling loads received by the energy shell plates approach whole-section plastic yield loads, energy consumption capacity of the box-shaped steel pier can be remarkably improved, rapid damage detection and reinforcement of the box-shaped steel pier after vibration are achieved, construction is rapid, and the construction period is short.
Owner:HUAQIAO UNIVERSITY
Turning bridge with damping function and construction method thereof
PendingCN110565538AAvoid destructionImprove seismic performanceBridge structural detailsBridge erection/assemblyEarthquake resistanceHysteresis
The invention provides a turning bridge with a damping function. The turning bridge comprises a pile foundation, a bridge pier and a beam body; an upper bearing platform and a lower bearing platform are arranged between the pile foundation and the bridge pier; the centers of the upper bearing platform and the lower bearing platform are connected through a spherical hinge; multiple soft steel dampers are arranged between the upper bearing platform and the lower bearing platform, are positioned on the outer side of the spherical hinge, and are arranged around the peripheral direction of the spherical hinge at equal intervals; multiple support feet are arranged in the peripheral direction of the bottom of the upper bearing platform; and concrete mortar is filled between the bottoms of the support feet and the lower bearing platform. The turning bridge uses a special structure of a turning bridge rotating system to cancel traditional sealing compound concrete construction; the soft steel dampers are arranged between the upper and lower bearing platforms of the turning bridge to achieve higher vertical bearing capacity, and can be cooperated with the support feet and the spherical hingeto support a bridge structure; meanwhile, the soft steel dampers can generate plastic yielding and hysteresis deformation to generate higher damping; and a lot of consumptions enter the earthquake energy of the structure, so that the destruction of the bridge structure is prevented, and the earthquake resistance of the bridge structure is improved.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Three-dimensional lattice material and its preparation method based on electron beam selective melting technology
ActiveCN106041084BMeet actual needsSmall sizeAdditive manufacturingIncreasing energy efficiencyDot matrixReliable computing
The invention provides a three-dimensional lattice material based on electron beam selective melting technology, which includes a three-dimensional structure formed by superimposing a plurality of basic units. The basic unit is composed of a plurality of isosceles triangles. The tops of the isosceles triangles overlap each other, the waists of the isosceles triangles are solid rods, the rest of the isosceles triangles are phantoms, and there is a waist overlapping between two adjacent isosceles triangles; the three-dimensional three-dimensional The material of the structure is pure titanium or titanium alloy. The invention also provides a method for preparing the lattice material. The three-dimensional lattice material provided by the present invention is mainly composed of a plurality of basic units superimposed. After being processed by electron beam selective melting, vacuum annealing, and chemical corrosion, it has stable compression performance, and its compression curve shows obvious plasticity. The yield platform shape provides a stable and reliable calculation basis for structural designers.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Box-shaped steel pier with embedded energy consumption shell plates
ActiveCN103774550ALower yield strengthYield strain is smallBridge structural detailsBridge materialsPlastic yieldingSheet steel
The invention discloses a box-shaped steel pier with embedded energy consumption shell plates. The box-shaped steel pier with the embedded energy consumption shell plates comprises a box-shaped steel pier body and a transverse separation plate. The lower portion of the box-shaped steel pier body is provided with a root separation chamber. The box-shaped steel pier with the embedded energy consumption shell plates further comprises a bottom plate welded to the lower end of the box-shaped steel pier body, the four corners in the root separation chamber are respectively provided with one energy consumption shell plate, each energy consumption shell plate is a low-yield-point steel plate, the yield strength of each low-yield-point steel plate is 100 MPa or 160 MPa or 225 MPa, the upper ends of the energy consumption shell plates are welded to the transverse separation plate, the lower ends of the energy consumption shell plates are welded to the bottom plate, the two sides of each energy consumption shell plate are welded to the corresponding two side walls of the box-shaped steel pier body, and through holes are formed in the transverse separation plate. The box-shaped steel pier with the embedded energy consumption shell plates has the advantages that when the embedded energy consumption shell plates receive pressure, the energy consumption shell plates are buckled outwards, deformed and limited by the side walls of the pier, buckling loads received by the energy shell plates approach whole-section plastic yield loads, energy consumption capacity of the box-shaped steel pier can be remarkably improved, rapid damage detection and reinforcement of the box-shaped steel pier after vibration are achieved, construction is rapid, and the construction period is short.
Owner:HUAQIAO UNIVERSITY
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