65results about How to "Reduce wet work workload" patented technology

The invention relates to a corrugated steel webplate combined box girder floor system for a cable-stayed bridge and a construction method thereof, and belongs to the technical field of bridge structures. The corrugated steel webplate combined box girder floor system comprises a precast concrete plank and a cast-in-place concrete seam, wherein the precast concrete plank is positioned on a steel box girder and is integrated with the steel box girder into a whole; the steel box girder is formed by welding a top flange steel plate, a corrugated steel webplate and a steel plate at the bottom of the box girder; a box girder baseplate stiffening rib and a diaphragm plate are welded in the steel box girder; the diaphragm plate comprises a top flange steel plate of the diaphragm plate and a steel webplate of the diaphragm plate; a toggle pin connecting piece is welded on the top flange steel plate and the top flange steel plate of the diaphragm plate; and a steel anchor pulling plate and a steel sleeve are welded on the top flange steel plate. The corrugated steel webplate combined box girder floor system simplifies the manufacturing process for the precast concrete plank, gives full play to the superior mechanical property of the corrugated steel webplate and the release action of the corrugated steel webplate on the creep effect of concrete shrinkage, improves the bearing capacity, stiffness and crack resistance of the structure, and improves the durability of the structure.

The invention discloses a lower flange improved corrugated steel web plate composite box girder and a construction method thereof, which belong to the technical field of bridge structures. The box girder consists of an upper flange concrete slab, a corrugated steel web plate, a lower flange concrete slab, an upper flange steel plate, a lower flange steel plate and male pin connecting pieces, wherein a steel bar mesh piece and a prestressed tendon corrugated pipe are arranged in the lower flange concrete slab. The lower flange concrete slab is connected with the lower flange steel plate and the corrugated steel web plate to form a whole body through the male pin connecting pieces which are welded above the lower flange steel plate and on the lateral surface of the corrugated steel web plate. By adopting the structure, the lower flange improved corrugated steel web plate composite box girder can solve the problems that the on-site amount of work and the construction difficulty are large for casting the lower flange concrete slab of the conventional corrugated steel web plate composite box girder, the construction quality is difficult to guarantee and the like under the premise of almost not increasing the steel consumption, gives full play to the tensile property of the steel plates and the restriction to concrete, enhances the bearing capacity and the cracking resistance of the structure, and improves the durability of the structure. The lower flange improved corrugated steel web plate composite box girder is simple in structure, reasonable in stressing and quick and convenient in construction, and has good technical and economic benefits.

The invention discloses a radiation heating and cooling integrated air conditioner in quick effect and changeable load. Load can be independently borne by an indoor machine or can be commonly borne by the indoor machine and a capillary tube, and the indoor temperature is regulated by mainly using the heat transmission modes of radiation and natural convection. A surface air cooler with larger surface area is provided when the load is independently borne by the indoor machine; and in the mode of commonly bearing the load, the indoor machine and the capillary tube are positioned in different return water supply loops, the water supply temperature of the indoor machine is different from that of the capillary tube, the temperature of water supplied to the indoor machine needs to be lower than that of water supplied to the capillary tube during the refrigerating in summer, and the temperature of water supplied to the indoor machine needs to be higher than that of water supplied to the capillary tube during the heating in winter. According to the radiation heating and cooling integrated air conditioner in quick effect and changeable load disclosed by the invention, the characteristics of quiet system, high heat comfort degree, energy saving, invisibility, attractive performance and the like of a traditional radiation air conditioner are reserved, the effect is rapid, the load can be adjusted, the indoor environment in higher standard can be built, and the radiation heating and cooling integrated air conditioner has larger developing space in high-grade buildings.

The invention discloses a bush constraint buckling-preventing support with a diamond-shaped energy dissipation unit. The bush constraint buckling-preventing support is characterized in that the bush constraint buckling-preventing support comprises an end constraint segment, an energy dissipation segment and a bush; and the two ends are connected with beams or column components or nodes to form a whole through bolts so as to achieve the purpose of improving of the resistant-lateral rigidity of components. The bush constraint buckling-preventing support with the diamond-shaped energy dissipation unit is adopted, and thus under the action of a small earthquake, the bush constraint buckling-preventing support keeps elasticity; and under the action of a medium earthquake or a severe earthquake, the energy dissipation segment enters a yield stage, and the effect of a damper can further be achieved through the good hysteretic energy dissipation performance of the energy dissipation segment. The bush constraint buckling-preventing support with the diamond-shaped energy dissipation unit can be prefabricated and formed in a factory, the quality of the components is ensured, the workload of site operation is reduced, and energy conservation and environment protection are achieved.

The invention discloses a casing pipe constraint buckling prevention support with symmetrical initial defects. The casing pipe constraint buckling prevention support with the symmetrical initial defects is characterized by being composed of end portion constraint sections, buckling sections and a casing pipe; and the two ends are connected with beam and column members or nodes to form a whole through bolts, so that the purpose of increasing the lateral rigidity resistance of the members is achieved. The casing pipe constraint buckling prevention support with the symmetrical initial defects keeps elasticity under the small earthquake effect, the buckling sections enter the buckling stage under the medium earthquake or major earthquake effect, and the good hysteretic dissipative energy can also achieve the effect of a damper. The casing pipe constraint buckling prevention support with the symmetrical initial defects can be prefabricated in a factory, the quality of the members is ensured, the workload of on-site construction work is reduced, and energy conservation and environmental protection are achieved.

The invention discloses a sleeve restraint anti-buckling support provided with staggered pyramid-shaped energy dissipation units. The sleeve restraint anti-buckling support provided with the staggered pyramid-shaped energy dissipation units is characterized in that the sleeve restraint anti-buckling support is composed of end restraint sections, energy dissipation sections and a sleeve, and the two ends are connected with beam or column components or joints in a whole through bolts, so that the purpose of increasing the resistant-lateral rigidity of a component is achieved. By the adoption of the sleeve restraint anti-buckling support provided with the staggered pyramid-shaped energy dissipation units, under the small shock action, the sleeve restraint anti-buckling support can be kept elastic; and under the medium or great shock action, the energy dissipation sections are switched to the buckling stage, and a damper effect can be achieved through the good hysteretic energy dissipation performance of the energy dissipation sections. The sleeve restraint anti-buckling support provided with the staggered pyramid-shaped energy dissipation units can be prefabricated in a factory, the quality of the component is guaranteed, the field construction workload is reduced, energy is saved, and environmental friendliness is achieved.

The invention discloses a device used for shear wall elevation and levelness control and a use method thereof. The device comprises a levelness control plate, fine adjusting supporting rods are connected to the end face of one side of the levelness control plate, a threaded part is arranged at the end, far away from the levelness control plate, of each fine adjusting supporting rod, and the fine adjusting supporting rods are movably connected to fine adjusting supporting rod support bases. The method includes the steps that S1, when a prefabricated shear wall is produced and manufactured, the fine adjusting supporting rod support bases are pre-buried; S2, the fine adjusting supporting rods are screwed into the fine adjusting supporting rod support bases and adjusted, so that the height of the end face of the top of the levelness control plate is consistent with the height of control elevation of the bottom of a prefabricated wallboard on the upper layer; S3, after concrete reaches certain strength, it is only needed that the prefabricated shear wall wallboard on the upper layer is directly placed on the levelness control plate. The elevation and levelness of the wallboard are effectively controlled, the installation period of the prefabricated wallboard is shortened, labor cost is reduced, and meanwhile wet construction workloads of operators in a construction site are reduced.

The invention discloses a concrete frame seismic reinforcement structure applying expanded metal. A to-be-reinforced concrete frame is formed by to-be-reinforced frame columns and to-be-reinforced frame beams. The expanded metal is connected between every two adjacent to-be-reinforced frame columns and every two adjacent to-be-reinforced frame beams on the same vertical plane respectively, constraint external members are fixed between the expanded metal and the to-be-reinforced concrete frame through connecting parts, steel with the yield strength smaller than that of the constraint external members is adopted in the expanded metal, and the connecting parts comprise high-strength bolts for connecting the expanded metal and the constraint external members and chemical bolts for connecting the constraint external members and the to-be-reinforced concrete frame. The constraint external members can improve the ductility of the to-be-reinforced frame columns. The expanded metal can improve the bearing capacity and energy-dissipating capacity of the to-be-reinforced structure. The concrete frame seismic reinforcement structure is used for structural reinforcement, the wet construction workload is small, the constraint external members can be prefabricated in a factory, only installation of the chemical bolts and the high-strength bolts needs to be completed on site, the industrial degree is high, construction is convenient and rapid, and the influences on normal use of a building are reduced.

The invention discloses a buckling induction support with the ends provided with oblique spiral induction units. The buckling induction support comprises constraining sections, energy consumption sections and a supporting straight section. The energy consumption sections are arranged at the two ends of the supporting straight section and each composed of at least one oblique spiral induction unit in the axial direction of the support. Each oblique spiral induction unit is a space body formed by sequentially arranging m oblique spiral induction sub units in the oblique direction, and the section of each space body is a spiral line. Each oblique spiral induction sub unit is a space structure formed by folding two triangular plates in the plane. The elasticity of the buckling induction support is maintained under small earthquake action, enters a buckling stage under middle earthquake or large earthquake action, and can further achieve the effect of a damper through the good hysteric energy consumption performance of the buckling induction support. Compared with traditional buckling constraining supports, by adoption of the buckling induction support, the site construction operation workload is decreased, and energy saving and environmental protection are achieved.

The invention discloses a construction method of a pile hole protective wall of a manually excavated anti-slide pile. The construction method comprises the following steps that firstly, a top-sectionprotective wall and various prefabricated pieces of protective wall units are prefabricated in a factory; secondly, a pile hole is excavated at the designed position according to the designed dimensions, when the excavation depth is equal to the height of the top-section protective wall, and the top-section prefabricated protective wall is hoisted and installed; thirdly, the pile hole continues being excavated downwards, when the excavation depth of the pile hole is equal to the height of the first-section protective wall unit, all the prefabricated pieces of the first-section protective wallunit are sequentially hoisted, installed and connected into a whole; fourthly, the third step is repeatedly executed until all the protective wall units are installed. The construction method has theadvantages that the prefabricated pieces of the top-section protective wall and the protective wall units all can be prefabricated in factory, it is just needed to install the top-section protective wall and the multiple sections of protective wall units in the pile hole from top bottom, so that the work amount of wet construction in the pile hole is greatly reduced, the construction speed is rapid, and the construction period is shortened.

The invention discloses an energy-consuming type buckling induction support with a variable-angle four-fold induction unit at the end. The energy-consuming type buckling induction support includes a restrained section and energy-consuming sections and further includes a supporting straight section, the energy-consuming sections are arranged at the two ends of the supporting straight section, each energy-consuming section is composed of at least one variable-angle four-fold induction unit in the axial direction of the support, and one variable-angle four-fold induction unit is a space body with the regular-polygon-shaped section, wherein the space body is formed by sequentially arranging m same variable-angle four-fold subunits in the ring direction and each variable-angle four-fold subunit is a space body formed by folding four trapezoidal plates in the same plane. Under the effect of a small shock, the energy-consuming type buckling induction support keeps elasticity, under the effects of a moderate or strong shock, the buckling induction support enters a yield stage, and the support has good stagnation and energy-consuming performance and has the effect of a damper. In the preparation, the addition of a sleeve on the outer part of a core energy-consuming member, grouting and other processes are voided, and the preparation is convenient to implement.

The invention discloses a casing pipe flexion induction supporting with a bidirectional spiral induction unit. The casing pipe flexion induction support is formed by end part restraint sections, a flexion induction section, an internal casing pipe and an external casing pipe, wherein the flexion induction section is clamped between the internal casing pipe and the external casing pipe; the internal and external casing pipes are respectively connected with one end restraint section; the flexion induction section is formed by at least one bidirectional spiral induction unit along a supporting axis direction; the bidirectional spiral induction unit is a spatial body with a cross section being in a regular-m polygonal shape and the spatial body formed by m bidirectional spiral sub-units annularly arrayed to form; and bidirectional spiral sub-unit is a spatial body formed by four triangular plates folded and with each two sharing the same line. The casing pipe flexion induction supporting can maintain elasticity with an action of slight vibration; upon medium or big vibration, the flexion induction section enters a flexion phase, and a damper effect can be achieved due to great hysteretic energy performance; and the casing pipe flexion induction supporting can be prefabricated in factories, so on-site construction load can be reduced and the casing pipe flexion induction supporting is energy-saving and environment-protective.

The invention discloses a buckling inducing brace with the ends provided with annular screw-type induction units. The buckling inducing brace with the ends provided with the annular screw-type induction units comprises retraining sections and energy dissipation sections and further comprises a brace straight section. The energy dissipation sections are arranged at the two ends of the brace straight section. Each energy dissipation section is composed of at least one annular screw-type induction unit in the axial direction of the brace. Each annular screw-type induction unit is a space body with a regular polygon section, wherein the space body is formed in the manner that m annular screw-type induction subunits are annularly and sequentially arranged. Each annular screw-type induction subunit is a space body which is formed by two collinear triangular plates through folding. The buckling inducing brace with the ends provided with the annular screw-type induction units keeps elasticity under the action of a small earthquake; and under the action of an intermediate earthquake or a large earthquake, the buckling inducing brace enters a yielding stage, and the buckling inducing brace can achieve the effect of a damper through the good hysteretic energy dissipation capacity. Compared with a traditional buckling restraining brace, the buckling inducing brace with the ends provided with the annular screw-type induction units lightens the on-site construction workload, saves energy and is environmentally friendly.

The invention discloses a sleeve buckling induction support with oblique spiral induction units. The sleeve buckling induction support is composed of end restraining sections, a buckling induction section, an inner sleeve and an outer sleeve, wherein the buckling induction section is clamped between the inner sleeve and the outer sleeve; the inner sleeve and the outer sleeve are each connected with one end restraining section; the buckling induction section is formed by the at least one oblique spiral induction units in the axis direction of the support; each oblique spiral induction unit is a space body formed by oblique and sequential arrangement of m oblique spiral subunits, and the section of the space body is in a spiral line shape; and each oblique spiral subunit is a space body formed by collinear folding of two triangular plates located in the same plane. The sleeve buckling induction support maintains elasticity under small earthquakes, and under intermediate or large earthquakes, the buckling induction section enters the buckling stage and can achieve the effect as a damper due to the excellent retard energy consumption performance.

The invention discloses a mounting and fixing device for a pre-cast shear wall and a use method of the mounting and fixing device. The mounting and fixing device comprises an anchoring concealed dovetail, a fine-tuning bolt bar and a fastening nut, wherein a cavity is formed in one end of the anchoring concealed dovetail; an internal thread is formed in the inner wall of the cavity; two ends of the fine-tuning bolt bar are respectively connected with the anchoring concealed dovetail and the fastening nut via threads. The use method comprises the following steps: S1, in plant production of composite floor slabs, the anchoring concealed dovetail is pre-buried; S2, the fine-tuning bolt bar is connected with the anchoring concealed dovetail; S3, when concrete reaches an early-stage strength, and an upper pre-cast wall is well mounted, the lower end of a telescopic adjustable support rod is placed on the fine-tuning bolt bar, and the telescopic adjustable support rod and the fine-tuning bolt bar are fastened and connected due to screwing of the fastening nut. According to the mounting and fixing device and the use method, not only can damage on water pipelines, electricity pipelines, fire pipelines and the like which are pre-buried in the composite floor slabs be avoided, but also the construction period is shortened effectively; moreover, the level of construction industrialization as well as those of plant factorization and modularization is realized.

The invention discloses a fabricated composite wallboard T-shaped constructional column and independent foundation connecting structure and a construction method, and relates to the technical field of fabricated constructional engineering. A T-shaped steel plate is welded to the bottom of a T-shaped constructional column reinforcement cage, a T-shaped notch is reserved in an independent foundation, steel plates are laid on the periphery of the notch, the whole steel plates are wedge-shaped, and the wedge-shaped steel plate laid on the inner side of the notch of the independent foundation in advance, the T-shaped steel plate at the bottom of the T-shaped constructional column and cast-in-place concrete interact. The T-shaped constructional column and the independent foundation form a whole, the pulling resistance of the constructional column is enhanced, the integrality is higher, more stable and firmer, a wall plate and a foundation beam are connected firstly, then the connecting part of the T-shaped constructional column and the independent foundation is poured through concrete, and connection of the T-shaped constructional column and the independent foundation is completed. The method is suitable for a large-quantity and wide-area low multi-layer fabricated (regenerated) concrete structure, and is excellent in anti-seismic property, ecological, environment-friendly, convenient to construct, economical and applicable.

The invention discloses a casing pipe bending induction support provided with circumferential trapezoid induction units. The casing pipe bending induction support consists of an end restraint section, a bending induction section, an inner casing pipe and an outer casing pipe, wherein the bending induction section is clamped between the inner casing pipe and the outer casing pipe, the inner casing pipe and the outer casing pipe are respectively connected with one end restraint section, and the bending induction section consists of at least one circumferential trapezoid induction unit in the axis direction of the support. The single circumferential trapezoid induction unit is a space body with a polygonal cross section formed by sequentially arranging m same circumferential trapezoid sub-units in the circumferential direction, and the circumferential trapezoid sub-units are space bodies formed by folding four isosceles trapezoidal plates located in a plane. The casing pipe bending induction support retains elasticity under a small shock effect, is at a yielding state under a medium or large shock effect, and the good hysteresis energy dissipation capacity can also play the effect of a damper. The casing pipe bending induction support can be prefabricated in a factory, the working amount of site construction operation is decreased, and the casing pipe bending induction support saves energy and is environmentally friendly.

The invention discloses a buckling induction support with pineapple type induction units at ends. The buckling induction support comprises constraint sections, energy dissipation sections and a support straight section, wherein the energy dissipation sections are arranged at two ends of the support straight section, each energy dissipation section comprises at least one oblique pineapple type induction unit arranged along the axial direction of the support, each oblique pineapple type induction unit is a spatial body is formed by m oblique pineapple type subunits sequentially arranged along an oblique direction, and the section of the spatial body is a spiral line; each oblique pineapple type subunit is a spatial body formed by folding six isosceles triangle boards in the same plane. The buckling induction support has the advantages that the buckling induction support keeps elasticity under a small seism effect; the buckling induction support enters a yield stage under a middle seism effect or a large seism effect, and the good hysteretic energy dissipation performance of the buckling induction support allows the buckling induction support to have the effect of a damper; compared with a traditional buckling restrained brace, the buckling induction support is capable of reducing the workload of on-site construction, capable of saving energy and environmentally friendly.

The invention discloses a concrete frame seismic reinforcement structure applying expanded metal. A to-be-reinforced concrete frame is formed by to-be-reinforced frame columns and to-be-reinforced frame beams. The expanded metal is connected between every two adjacent to-be-reinforced frame columns and every two adjacent to-be-reinforced frame beams on the same vertical plane respectively, constraint external members are fixed between the expanded metal and the to-be-reinforced concrete frame through connecting parts, steel with the yield strength smaller than that of the constraint external members is adopted in the expanded metal, and the connecting parts comprise high-strength bolts for connecting the expanded metal and the constraint external members and chemical bolts for connecting the constraint external members and the to-be-reinforced concrete frame. The constraint external members can improve the ductility of the to-be-reinforced frame columns. The expanded metal can improve the bearing capacity and energy-dissipating capacity of the to-be-reinforced structure. The concrete frame seismic reinforcement structure is used for structural reinforcement, the wet construction workload is small, the constraint external members can be prefabricated in a factory, only installation of the chemical bolts and the high-strength bolts needs to be completed on site, the industrial degree is high, construction is convenient and rapid, and the influences on normal use of a building are reduced.

The invention discloses a bushing buckling induction support with variable-length pineapple-shaped induction units. Composed along the axial direction of the support, the end faces of the variable-length pineapple-shaped induction units located on both sides of the buckling induction section are planes truncated by a cross-section perpendicular to the axial direction and passing through the apex; the single variable-length pineapple-shaped The inducing unit is composed of m identical variable-length pineapple-shaped subunits arranged in turn along the ring direction to form a space body with a polygonal cross-section. The present invention adopts the casing buckling-inducing support with pineapple-shaped induction units of variable length. Under the action of small earthquakes, the buckling-inducing support maintains elasticity. The energy recovery performance can also act as a damper.

The invention discloses a buckling control support with the end provided with a staggered pyramid type energy consumption unit. The buckling control support is characterized by being composed of an end restraint section, energy consumption sections and a supporting flat section. The two ends of the buckling control support are connected with beams, column components or nodes through bolts to form a whole, so as to achieve the objective of improving lateral stiffness resistance of the components. The buckling control support with the end provided with the staggered pyramid type energy consumption unit maintains elasticity under the effect of a small earthquake; when the effect of a medium earthquake or a large earthquake occurs, the buckling control support enters a yielding phase, and the effect of a damper can be achieved due to the good hysteresis energy consumption performance of the buckling control support. Compared with a conventional buckling restraint support, according to the buckling control support, the processes of adding a sleeve outside a core energy consumption component in the conventional manufacturing process and performing grouting and the like are avoided in manufacturing process, and the buckling control support is convenient to manufacture. The support can be prefabricated in a factory, the component quality is guaranteed, the site construction operation workload is reduced, and the buckling control support saves energy and is environmentally friendly.

The invention discloses a buckling inducing brace with the ends provided with annular screw-type induction units. The buckling inducing brace with the ends provided with the annular screw-type induction units comprises retraining sections and energy dissipation sections and further comprises a brace straight section. The energy dissipation sections are arranged at the two ends of the brace straight section. Each energy dissipation section is composed of at least one annular screw-type induction unit in the axial direction of the brace. Each annular screw-type induction unit is a space body with a regular polygon section, wherein the space body is formed in the manner that m annular screw-type induction subunits are annularly and sequentially arranged. Each annular screw-type induction subunit is a space body which is formed by two collinear triangular plates through folding. The buckling inducing brace with the ends provided with the annular screw-type induction units keeps elasticity under the action of a small earthquake; and under the action of an intermediate earthquake or a large earthquake, the buckling inducing brace enters a yielding stage, and the buckling inducing brace can achieve the effect of a damper through the good hysteretic energy dissipation capacity. Compared with a traditional buckling restraining brace, the buckling inducing brace with the ends provided with the annular screw-type induction units lightens the on-site construction workload, saves energy and is environmentally friendly.

The invention discloses a prefabricated concrete wallboard and a wallboard structural system constructed through prefabricated concrete wallboards and provided with a hidden frame. A reinforcing mesh in the wallboard comprises a hidden supporting reinforcing mesh body. The hidden frame of the structural system constructed through the wallboards is formed by casting concrete at joints of a floor and the wallboards in place, and an inner frame of a whole building is formed. Prefabricated concrete hollow walls, boards and beams are connected into a whole, the space structural system with good overall work performance and lateral load resisting performance is formed, effective connection of stressed complex positions can be guaranteed, and the problem that the overall performance and the anti-seismic property of a prefabricated building are poor can be solved. Vertical prestress is applied to the walls of the high-rise building in batches to enhance the stress performance of the wall structure, hidden supports are arranged in the prefabricated walls to form a hidden frame space system with the hidden supports, and the requirement for seismic fortification is improved. The wallboard structural system has the remarkable beneficial effects of being high in assembly rate, good in integrity and anti-seismic property, excellent in waterproofness and the like, and can be suitable for building of multi-storey house buildings and high-rise house buildings.

The invention discloses a buckling induction support with variable-length double-layer concave induction units at the end. The support comprises a constraint segment, energy dissipation segments and a straight support segment. The energy dissipation segments are mounted on the two ends of the straight support segment. Each energy dissipation segment is formed by at least one variable-length double-layer concave induction unit in the axial direction of the support. Each variable-length double-layer concave induction unit is a space body formed by sequentially arranging m variable-length double-layer concave subunits in the circumferential direction, wherein the section of the space body is a regular polygon. Each variable-length double-layer concave subunit is a space body formed by folding six triangular plates and six trapezoidal plates in the same plane. The buckling induction support keeps elasticity under the work of small earthquakes and enters a buckling stage under the work of medium earthquakes or major earthquakes, and the buckling induction support can achieve the effect of a damper due to the good hysteretic energy dissipation performance. Compared with a traditional buckling constraint support, the workload of on-site construction is reduced in the manufacturing process, and energy conservation and environment protection are achieved.

The invention discloses a prefabricated floor slab small-slope roof structure, a construction method and prefabricated floor slabs, the prefabricated floor slab small-slope roof structure comprises a frame beam and a plurality of prefabricated floor slabs laid on the frame beam, the prefabricated floor slabs are continuously arranged in rows in the slope direction of a slope roof, the multiple rows of prefabricated floor slabs are arranged at intervals in the direction perpendicular to the slope, and each prefabricated floor slab comprises a slab body; the front end and the tail end of each slab body extend downwards to form longitudinal sections and then are bent outwards to form butt joint parts, the butt joint parts of every two adjacent prefabricated floor slabs in each row are oppositely combined to form a filling area defined by the longitudinal sections and the butt joint parts, and gaps are formed between the prefabricated floor slabs and the frame beams. Gaps communicated with the gaps and the filling areas are formed in the two sides of each row of prefabricated floor slabs, and the gaps, the gaps and the filling areas are filled with concrete, so that all the prefabricated floor slabs and the frame beam are fixedly connected through the concrete, and every two adjacent prefabricated floor slabs are fixedly connected through the concrete. The device is simple and compact in structure, meets the safety requirement, is simple and convenient to assemble on site, reduces the construction difficulty and labor intensity, and improves the working efficiency.

The invention discloses a buckling induced brace provided with length-variable pineapple type induction units at the end parts. The brace comprises a restraint section and an energy dissipation section and further comprises a flat brace section, wherein the energy dissipation section comprises at least one length-variable pineapple type induction unit in the axis direction of the brace; each length-variable pineapple type induction unit is a space body which is formed by arranging m length-variable pineapple type subunits in the annular direction sequentially and has a section of a 2m-regular polygon, and each length-variable pineapple type subunit is a space body formed by folding six isosceles triangle boards in the same plane. With the adoption of the buckling induced brace provided with the length-variable pineapple type induction units at the end parts, the buckling induced brace keeps elasticity under the action of small earthquakes and enters a yield stage under the action of medium earthquakes or large earthquakes, and the buckling induced brace can realize the effect of a damper by the aid of good hysteretic and energy dissipation performance. Compared with a conventional buckling restrained brace, the buckling induced brace has the advantages that workload for site operation is reduced in the aspect of a manufacturing process and energy conservation and environmental protection are realized.

The invention discloses a fabricated composite wallboard L-shaped constructional column and independent foundation connecting structure and a fabricated composite wall construction method.The fabricated composite wallboard L-shaped constructional column and independent foundation connecting structure comprises a foundation beam, an independent foundation, a foundation cushion layer and an L-shaped constructional column, the foundation cushion layer is arranged below the foundation beam and the independent foundation, and the independent foundation is arranged at the L-shaped corner of the foundation beam; the foundation beam and the independent foundation are poured into a whole on site through concrete, a concave groove with an upward opening is formed in the upper surface of the foundation beam, the lower portion of the assembly type composite wallboard is fixedly connected into the concave groove, the independent foundation is provided with an L-shaped groove, steel plates are embedded in the vertical faces of the sides of the L-shaped groove, the lower portion of the L-shaped constructional column is inserted into the L-shaped groove, and the lower portion of the L-shaped constructional column is fixedly connected with the L-shaped groove. The lower portion of the L-shaped constructional column and the independent foundation are poured together through cast-in-place concrete to form a whole, and the assembly type composite wall plate is fixedly connected with the L-shaped constructional column. Prefabricated construction of the constructional column is achieved, the wet construction workload on a construction site is greatly reduced, and the construction period is shortened.

The invention discloses a sleeve buckling inducing support with variable-angle four-crease-type inducing units. The support comprises end constraint segments, a buckling inducing segment, an inner sleeve and an outer sleeve. The end constraint segments are located at the two ends of the buckling inducing segment, the buckling inducing segment is sandwiched between inner sleeve and the outer sleeve, and the inner sleeve and the outer sleeve are connected with the end constraint segments respectively. The buckling inducing segment is formed by at least one variable-angle four-crease-type inducing units in the axial direction of the support, and each variable-angle four-crease-type inducing unit is a space body formed by sequentially arranging m identical variable-angle four-crease-type subunits in the circumferential direction, wherein the section of the space body is a regular polygon. Each variable-angle four-crease-type subunit is a space body formed by folding four trapezoidal plates in the same plane. The buckling inducing support has good hysteretic energy dissipation performance and can achieve the effect of a damper; the support can be prefabricated in a factory, the component quality is guaranteed, the workload of on-site construction is reduced, and energy conservation and environment protection are achieved.