94 results about "Plastic hinge" patented technology

The invention discloses a novel bionic arc-shaped reinforced re-entry honeycomb structure and a platform stress theoretical model, and arc-shaped supports are embedded into traditional re-entry unit cells by utilizing a bionic principle to trigger coupling deformation of multiple plastic hinges, so that the strength, rigidity, stability and energy absorption of the structure are remarkably improved. A platform stress theoretical model of the novel structure is provided based on an energy conservation principle, so that the cost of time, workload and the like of numerical simulation and experiments in a preliminary optimization design stage of the structure is remarkably reduced. Under the parameters of the invention, the platform stress and the specific energy absorption of the reentrant honeycomb structure are up to 10.4 times that of the traditional reentrant honeycomb structure, the rigidity and the stability of the reentrant honeycomb structure are improved to 11.7 times and 1.7 times, and the stable deformation mode and the crushing force efficiency of the reentrant honeycomb structure are superior to those of the traditional reentrant honeycomb structure. The composite material is suitable for scenes requiring high energy absorption and stable impact resistance, such as the protection fields of equipment such as pier collision resistance, canal collision resistance gates, automobile collision resistance, aircraft wing buffer layers and run-flat tires in civil engineering.

The invention provides a high-definition image rapid reconstruction method for concrete plastic hinge area identification, and the method is especially used for carrying out damage evaluation on a key part, namely a plastic hinge area, of a beam-column joint in a reinforced concrete frame structure after an earthquake. Fusing the texture features of the dust deposition covering area, and recovering covered cross oblique crack details to obtain a complete crack form image set; and optimizing reconstruction of a three-dimensional space and generating a final damage model through point cloud data obtained through oblique photography of the unmanned aerial vehicle in combination with the updated stripping depth damage model, outputting visual three-dimensional reconstruction results of spatial distribution of cross oblique cracks, concrete stripping depth and a steel bar buckling form, and generating a plastic hinge region damage state image. The method provides powerful technical support for accurately evaluating the safety of the post-earthquake structure.

The invention relates to the technical field of vehicle energy absorption structures, in particular to a concave unit cell energy absorption structure, a honeycomb multi-cell structure and a vehicle. The inwards-concave unit cell energy absorption structure comprises an inwards-concave hexagonal structure, a first straight connecting rod, a second straight connecting rod, a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib intersect in the inwards-concave hexagonal structure to form a third inwards-folding point. The cell walls of the inward-concave hexagonal structure can rotate around the end points to form plastic hinges, the negative Poisson's ratio effect is achieved, deformation coordination is enhanced, the cell walls in the structure continuously absorb external mechanical energy in the rotating and buckling process, transmission of impact force to other structures of the whole vehicle is relieved, and the energy absorption effect of impact load resistance is achieved. Due to the fact that the first reinforcing ribs and the second reinforcing ribs are added, a plurality of new nodes and rotating units are formed, the number of plastic hinges is remarkably increased, and the energy dissipation capacity of the structure in the impact process is remarkably improved.

The invention discloses a composite beam plastic flexural capacity correction calculation method considering interface slippage. The method is suitable for a hogging moment area of a steel-concrete composite beam reinforced by an external prestress carbon fiber reinforced composite material rib. The method comprises the following steps: firstly, determining basic static boundary parameters and a shear connector constitutive model; in the iterative calculation, solving a temporary bearing capacity by utilizing an axial force and moment balance equation, and calculating interface slippage along the beam length and a deformation loss item at the support based on internal force distribution; then determining a rigidity degradation coefficient according to the average slip amount, and dynamically reducing the static yield bending moment to reconstruct the plastic hinge length; and finally, constructing a corrected deformation coordination equation, deducting a deformation loss item in geometric deformation calculation to obtain the real elongation of the in-vitro CFRP rib, and updating a stress parameter until a result is converged. According to the method, by introducing a deformation loss item and a rigidity degradation mechanism, deviation caused by traditional rigid connection assumption is corrected, and accurate prediction of the ultimate bearing capacity is achieved.

The invention discloses a beam-column joint with a replaceable self-resetting bionic plastic hinge and application, the beam-column joint comprises a steel beam, an upper prefabricated column, a lower prefabricated column and a connecting joint for connecting the upper prefabricated column, the lower prefabricated column and the steel beam, and the replaceable self-resetting bionic plastic hinge is connected between an overhanging beam on one side of the connecting joint and the steel beam; the replaceable self-resetting bionic plastic hinge comprises a torsion amplification damper which is connected to the end faces of the upper and lower flanges of the pair of connecting beam sections and is connected by a rotating arm, a self-resetting device which is arranged on the butt-joint end faces of the upper and lower flanges of the pair of connecting beam sections, and a pair of friction hinges which are arranged at the butt-joint ends of the pair of connecting beam sections and are mutually nested and wrapped to form rotation. The beam-column joint not only has excellent energy dissipation performance, but also can concentrate post-earthquake damage, protect a main body structural member from being damaged, and improve the anti-seismic performance of the beam-column joint; meanwhile, the replaceable self-resetting bionic plastic hinge is connected with the steel beam and the joint core area through high-strength bolts and lug plates, mounting and dismounting are easy, and the replaceable function after an earthquake can be achieved.

The invention relates to a damping support which comprises a first supporting beam, a second supporting beam and supporting legs. The number of the first supporting beams is two, the two first supporting beams extend in the first direction and are arranged in a spaced mode in the second direction, and the first supporting beams are provided with supporting legs. The second supporting beam is arranged between the two first supporting beams and extends in the second direction. At least one of the first support beam and the second support beam is provided with a hinge section configured to yield when an earthquake acts such that at least one of the first support beam and the second support beam forms a plastic hinge. Shaping energy consumption is carried out through the plastic hinge, input earthquake energy is consumed, meanwhile, the rigidity of the shock absorption support can be reduced through forming of the plastic hinge, the fundamental frequency of the whole structure is reduced, the shock absorption support deviates from the characteristic frequency of a building, frequency decoupling is achieved, the resonance amplification effect is avoided, and earthquake response is reduced. In addition, the overall structure height of the damping support is low, and the damping support can adapt to the indoor environment with strict limitation on the total installation height of equipment.

This invention discloses a low-damage steel frame structure and a prefabrication and assembly method. The structure includes: a foundation, a first frame column, a second frame column, frame beams, floor slabs, beam end connectors, and column bottom connectors. The first frame column is installed on the foundation via column bottom connectors. The second frame column is positioned above the first frame column, with the number of second frame columns determined according to the number of structural floors. The connection points between the first and second frame columns, as well as the connection points between two adjacent second frame columns, are located at the inflection points of each floor. The frame beams are fixedly connected to the second frame columns on both sides via beam end connectors. The floor slab is positioned on the upper surface of the frame beams. This invention enables the beam-column joints and column bottom joints to achieve a bending-shear separation stress mechanism, extending the plastic hinge areas at the beam ends and column bottoms, thereby reducing damage to the beam-column joints and column bottom joints, minimizing residual deformation of the steel frame structure, and improving the seismic toughness of the structure. All structural components can be prefabricated in a factory and assembled on-site, facilitating construction.

The application relates to the technical field of building engineering, in particular to a prefabricated external ECC jacket combined column, which comprises a column body and a prefabricated ECC jacket mechanism, and the prefabricated ECC jacket mechanism is located in the plastic hinge area of the column body; the prefabricated ECC jacket mechanism comprises multiple jacket single pieces and multiple connecting assemblies, the multiple jacket single pieces are fixed to the outer periphery of the column body in a spaced jacket mode, and the connecting assembly is connected between two adjacent jacket single pieces; the connecting assembly comprises a connecting frame body, a damping piece and a detection piece, the damping piece and the detection piece are installed in the connecting frame body, and the jacket single piece is inserted into the connecting frame body from both ends and fixed therein. The prefabricated ECC jacket and the connecting assembly are cooperated to significantly improve the stress and strain level of the concrete in the column body, and the anti-seismic performance is greatly enhanced, the problem that the traditional reinforcing mode is prone to through cracks is fundamentally solved, and the constraint effect of the jacket structure is ensured to be continuously exerted.

The utility model relates to the technical field of constructional engineering, and discloses a prestress connection integrated double-column pier plastic hinge structure which comprises a cover beam, double-column piers and a bearing platform, the cover beam and the bearing platform are arranged up and down, and the double-column piers are arranged on the two sides of the cover beam and the two sides of the bearing platform; the bent cap, the double-column pier and the bearing platform are connected in series through steel strands, a plastic hinge area is arranged at the position of the double-column pier, and dense stirrups are installed in the plastic hinge area. According to the prestress connection integrated double-column pier plastic hinge structure, the cover beam, the double-column pier and the bearing platform are connected through various measures, the shock resistance among the cover beam, the double-column pier and the bearing platform after assembly is enhanced, and therefore the stability of a follow-up bridge during use is guaranteed, the overall construction speed is increased through the mode, and the construction period is shortened. And the pollution to the surrounding environment is further reduced.

The RC column concentrated plastic hinge model research method based on lateral stiffness relates to the structural seismic technology field; the method aims to solve the problem that the simulation precision of the existing concentrated plastic hinge model is influenced by the value of the multiplier n, and the function relationship between the spring rotation stiffness and the component lateral stiffness is established, without defining the multiplier n; the specific steps include deducing the concentrated plastic hinge series model unit stiffness matrix of the cantilever column, establishing the function relationship between the rotation stiffness and the lateral stiffness, designing the state updating algorithm based on the displacement loading control, verifying the accuracy of the new model, and comparing the precision of the existing model; the experimental results show that the simulation precision of the model is improved significantly, the nonlinear behavior of the RC column can be accurately simulated without the multiplier n, and the method has important practical significance; the method has been successfully applied to the seismic analysis of a plurality of typical RC frame structures, not only simplifies the calculation process, but also improves the calculation efficiency, provides a more reliable and convenient tool for the structural seismic design, and has high popularization value.

The present application relates to the technical field of bridge, in particular to a bridge anti-seismic method and structure with multi-stage ordered reset energy dissipation, which can activate each stage of anti-seismic mechanism according to the expected design order under a once-in-a-lifetime earthquake, and can ensure that the bridge adapts to different earthquakes with different performance states, has flexible isolation and self-resetting function under small earthquakes, can pass through directly without repair after the earthquake; has the function of sliding isolation and energy dissipation under medium earthquakes, the main components are not damaged after the earthquake, and only the T-beam reset and the quick replacement of the mild steel energy dissipation element are needed to restore the traffic; has the function of automatic anti-falling beam under a large earthquake, and changes the force transmission path of the bridge structure; under a once-in-a-lifetime earthquake, the bridge is converted from the isolation mode to the ductility mode, the plastic hinge of the pier column is used for hysteresis energy dissipation to resist the earthquake, the seismic potential of the bridge structure is excavated to the greatest extent, and the life safety is ensured.

This invention discloses a double-layer steel-tube concrete column and its construction method in the field of concrete-steel tube column technology, which can guide the force. It includes an outer protective tube, a ribbed inner tube, a reset tie rod, and a concrete column. The outer protective tube and the ribbed inner tube form a double tube, and the bearing capacity and stiffness of the concrete-steel tube column are actively controlled by the thickness difference between the connecting tube and the outer protective tube. The double tube achieves a double-gradient constraint effect, achieving the purpose of controllable damage and controllable plasticity. This makes the order of the column's plastic hinge reasonable. At the same time, a longer reset tie rod is set locally, and the reset rib is formed by the superelasticity of the material. This enables the column structure to self-reset after being shaken. Moreover, the construction method is simple, and the repair is simpler when the column is slightly damaged.

The invention relates to the technical field of constructional engineering, in particular to a prefabricated external ECC jacket combination column which comprises a column body and a prefabricated ECC jacket mechanism, and the prefabricated ECC jacket mechanism is located in a plastic hinge area of the column body; the prefabricated ECC clamping sleeve mechanism comprises a plurality of clamping sleeve single pieces and a plurality of connecting assemblies, the multiple clamping sleeve single pieces are fixedly arranged on the periphery of the column body in a sleeving mode at intervals, and the connecting assemblies are connected between every two adjacent clamping sleeve single pieces; the connecting assembly comprises a connecting frame body, a damping piece and a detecting piece, the damping piece and the detecting piece are installed in the connecting frame body, and the clamping sleeve single piece is inserted and fixed into the connecting frame body from the two ends. Through the synergistic effect of the prefabricated ECC jackets and the connecting assemblies, the stress-strain level of concrete in the column body is remarkably improved, then the anti-seismic property is greatly enhanced, the problem that through cracks are likely to occur in a traditional reinforcing mode is fundamentally solved, and it is ensured that the jacket structure continuously plays a constraint effect.

The invention discloses a fiber concrete column equivalent plastic hinge length calculation method, and relates to the field of civil engineering structure aseismic design. The method comprises the following steps: determining horizontal displacement and horizontal force of the top end of the fiber concrete column through stress analysis; secondly, calculating yield bending moment and ultimate bending moment based on bending failure assumption; then the actual plastic hinge length is determined according to the bending moment ratio; and finally, establishing an equivalent plastic hinge calculation model, and taking half of the actual length as an equivalent value. According to the method, the concrete structural form of the fiber concrete column is combined, the influence of the fiber mixing amount is considered in a concrete column equivalent plastic hinge length formula, and the method is used for calculating the fiber concrete column equivalent plastic hinge length. According to the method, the calculation precision is improved, the structural ductility is enhanced, the problems of modeling deficiency and low efficiency in a traditional method are solved, and the blank in the prior art is filled.

The application discloses a corner energy dissipation prefabricated assembling joint, which comprises a concrete prefabricated beam, a concrete prefabricated column, a concrete steel plate embedded part, a rotating shear steel rod and high-strength ductile material; one concrete steel plate embedded part is embedded on one end surface of the concrete prefabricated beam, and the other concrete steel plate embedded part is embedded on the side wall of the concrete prefabricated column; the rotating shear steel rod is clamped between the two concrete steel plate embedded parts; the high-strength ductile material is poured in the space surrounded by the rotating shear steel rod and the two concrete steel plate embedded parts, and is used for connecting and fixing the rotating shear steel rod and the two concrete steel plate embedded parts; the built-in prestress reserved holes for supplying force steel strands are arranged in the concrete prefabricated beam, the concrete prefabricated column, the width direction of the concrete steel plate embedded part and the radial direction of the rotating shear steel rod. The application delays the damage caused by the delayed plastic hinge cracking of the rotating shear steel rod, improves the flexibility of the joint and reduces the damage degree of the joint area.

The application belongs to the technical field of bridge engineering, and provides a post-earthquake replaceable transfer plastic hinge bridge pier and a mounting method. A first connecting piece of a first pier body prefabricated section and a second connecting piece of a second pier body prefabricated section are fixedly connected through a plastic hinge zone device, a shear resistance device is used in cooperation with connecting glue to improve the shear resistance of a spliced joint, the shear resistance device replaces artificial chiseling, saves manpower, does not damage the bridge pier, has omnidirectional dead angle-free shear resistance, improves the installation efficiency, and improves the safety and service life of the prefabricated bridge pier due to the fact that no chiseling treatment is performed and the bridge pier is not damaged.

The invention discloses a permafrost region high bearing platform pile foundation pier bearing performance improving device based on a non-structure replaceable concept. The permafrost region high bearing platform pile foundation pier bearing performance improving device specifically comprises a vertical supporting device, a horizontal supporting device and a connecting device. By arranging the semicircular steel sleeve, the overall rigidity of the plastic hinge area of the high bearing platform pile foundation in the permafrost region is enhanced, the connection between the pile foundation and the bearing platform is enhanced, and the overall stress principle is adopted; and the capability of resisting horizontal and bending moment of the pile foundation pier is greatly enhanced, so that the damage degree of the high bearing platform pile foundation pier under the action of static and dynamic loads is reduced, and the safety of a main body structure is ensured. All components of the device are replaceable components, when the components are damaged under the action, rapid replacement of the components can be achieved, the repairability of the pile foundation pier is improved, and the toughness of the high bearing platform pile foundation pier in the permafrost region is enhanced.

The utility model discloses a kind of honeycomb beam-column interseismic structure, including vertical column, horizontal crossbeam is connected on the vertical column, anti-seismic mechanism is arranged between the vertical column and horizontal crossbeam, the anti-seismic mechanism includes triangular support frame, slot and fixed slot, the triangular support frame is connected with plug-in block, the plug-in block is inserted in the inside of fixed slot, plug-in block is connected with locating block, internal thread hole is opened on the locating block.The utility model fills in the frame of triangular support frame by honeycomb array module formed by the interlaced stacking of multilayer regular hexagon honeycomb unit, shear thickening fluid is injected in its honeycomb unit, the structure is deformed by the three-stage energy dissipation mechanism of elastic deformation, plastic buckling and fluid viscosity of honeycomb unit, cooperate plastic hinge deformation of triangular support frame, realize efficient anti-seismic, honeycomb hollow design makes component weight reduction more than 45%, and only damaged honeycomb module needs to be replaced after earthquake, and it can be quickly repaired.

The utility model discloses a connecting component suitable for a bridge stirrup. The connecting component is a curve-shaped variable-thickness sleeve, the thickness of the two ends of the sleeve is small, the thickness of the middle is large, and a linear section is designed in the middle. Threads are machined at the tail ends of the bridge stirrups, and corresponding connecting threads are arranged in the corresponding connecting components. The distance between the end of the bridge steel bar and the middle point of the sleeve does not exceed 10 mm. Bridge stirrups which are not suitable for construction are connected through the curve type variable-thickness sleeve to form a ring in a closed mode, the space needed by construction is small, operation is convenient, the complexity of construction of the rectangular stirrups of the thin-wall hollow pier of the bridge is greatly reduced, and construction efficiency is improved; and the size of the thick sleeve at the joint of the stirrups ensures the anti-shearing and anti-seismic requirements of the stirrups in the plastic hinge section of the bridge pier column, and the connection quality of the stirrups is ensured.

The application belongs to the technical field of bridge engineering, and particularly relates to a deep water superimposed pile cap construction method. The method comprises the following steps: S1, installing a pile top pre-buried support, and then pouring pile foundation concrete; installing a prefabricated pile cap, wall pile cap steel bars and pre-buried vertical rods in a prefabrication yard, and then installing a steel bottom plate; pouring prefabricated pile cap concrete and curing, so that the prefabricated pile cap is fixedly connected with lower ends of the two pre-buried vertical rods; S2, assembling a base plate and a cross beam at upper ends of the two pre-buried vertical rods to form a suspension assembly; the application does not need to set cofferdams, bottom seals, auxiliary piles and other components, simplifies site formwork erection and formwork removal processes, and saves engineering materials; compared with full prefabricated components, the pile cap plastic hinge area is a cast-in-place structure, which not only has higher overall stability and safety, but also has lower hoisting weight, further reducing construction risks and construction difficulties; the application not only avoids the problem of insufficient space for processes such as steel bar binding and pile head breaking, but also has higher stability and safety.

The utility model discloses a plastic hinge with a limiting structure, which belongs to the technical field of plastic hinges and comprises a hinge shaft, a lower hinge fixedly mounted on the outer side of the hinge shaft, an upper hinge rotatably mounted on the outer side of the hinge shaft, a mounting box fixedly mounted at the top end of the hinge shaft, and two rectangular blocks fixedly mounted on the inner side of the bottom of the mounting box. And inclined grooves are formed in the two rectangular blocks correspondingly, limiting blocks are slidably connected in the two inclined grooves correspondingly, inclined blocks movably abut against the bottoms of the two limiting blocks correspondingly, circular insertion rods are fixedly installed on the inner sides of the two inclined blocks correspondingly, and a plurality of insertion holes are formed in the surfaces of the connecting cylinder and the hinge shaft correspondingly. Through mutual cooperation of the pull ring, the T-shaped plate, the guide column, the connecting block, the limiting block, the inclined block, the first reset spring, the circular insertion rod and the insertion hole, accidental rotation cannot occur after the angle of the upper hinge is adjusted, so that the stability and the safety of the whole structure are greatly improved, and the practicability is wider.

A plastic hinge having elastic deformation is provided. The plastic hinge includes a body formed of plastic and shaped as a solid cylinder, the body including a groove having a depth extending from an outer surface of the body to an axial center of the body, the groove including a bottom and an opening, a width of the groove being gradually increased from the bottom to the opening, and the bottom being shaped as an U.

The utility model discloses a buckling-restrained brace and belongs to the field of constructional engineering, the buckling-restrained brace comprises a steel brace inner core and a constraint steel member, a sliding groove is formed in the inner wall of the steel brace inner core, a sliding block is slidably connected to the inner wall of the sliding groove, a connecting lug is fixedly mounted on the outer side of the sliding block, and adjusting springs are fixedly connected to the upper side and the lower side of the sliding block; a bolt is fixedly mounted at the bottom of the constraint steel member; by arranging the steel support inner core and the constraint steel member, the double functions of a common support and a metal damper are combined, under the action of medium earthquake, the structural earthquake force is remarkably reduced, the design internal force of each main anti-seismic member is correspondingly reduced, and therefore the section size of each anti-seismic member can be correspondingly optimized and adjusted, and the anti-seismic performance is improved. The main anti-seismic component can still meet the anti-seismic performance index of middle-seismic elasticity, under the action of large earthquakes, the steel support inner core yields to dissipate energy, plastic hinges appear on part of beam components, plastic hinges do not appear on column components basically, and the requirement that falling does not occur in the large earthquakes is met.

The application discloses a novel modular steel-concrete composite joint, comprising a corner column and a sleeve module, the corner column is a right-angle three-axis frame structure, a plurality of corner columns are spliced to form a corner column unit according to needs, the corner column units are connected through the sleeve modules, the sleeve module and the corner column unit are hollow structures, and the hollow structures are filled with concrete. The novel modular steel-concrete composite joint has the characteristics of high connection integrity, safety and reliability, clear force transmission path, replaceable damaged components and the like, and simultaneously has superior anti-seismic performance and detachable and reusable characteristics. The novel modular composite joint adopts a self-recovery device, which not only guarantees the reusability and rapid post-earthquake repairing capacity of the module unit, but also realizes reasonable outward movement of a plastic hinge, and significantly improves the energy consumption and deformation capacity of the structure.

The application belongs to the technical field of aviation structure impact dynamics, and is a kind of crash dynamics modeling method for simplifying fuselage frame section structure of an airplane. A fuselage frame section model is established by corresponding structural characteristics of the fuselage frame section, the position and deformation mode of a large deformation region in the fuselage frame section model are determined, the large deformation region is simulated into a plastic hinge, and torque and axial force performance parameters corresponding to the plastic hinge are determined. Different gravity fields and initial velocities are given to the fuselage frame section, and the response of the plastic hinge of the fuselage frame section structure at different deformation degrees is calculated. Based on the plastic large deformation principle, the advantages of simple connection relationship model, fast calculation efficiency and high calculation accuracy of the finite element method are fully combined, the calculation efficiency of the crash finite element analysis of the fuselage frame section of the airplane is improved, and potential calculation non-convergence problems in the calculation of the plastic large deformation region of the fuselage frame section structure of the airplane can be avoided, the design cycle of the airplane structure adaptability is shortened, and the application prospect is great.

This invention discloses a replaceable beam-column seismic joint structure, including a web in the vertical direction, end plates fixedly connected to the left and right ends of the web, flanges horizontally arranged at the upper and lower ends of the web, and a connecting assembly connected to the flanges and the web. The connecting assembly includes a groove in the middle of the upper and lower sides of the web, a connecting shell connected to the groove by a snap-fit ​​body, a receiving groove in the connecting shell, and a rubber block in the receiving groove for filling the receiving groove. The upper and lower sides of the connecting shell contact the web and the flange respectively to achieve large deformation of the joint structure to consume a large amount of external energy. The flange is a corrugated flange. By weakening the connection between the web and the corrugated flange, the plastic hinge of the beam is controlled to move outward to the joint, achieving the design goal of strong joint and weak member. Under seismic action, the plastic hinge rotates, and the good deformation capacity of the corrugated flange and rubber is used to consume seismic energy.

This invention discloses a method for modeling the plastic hinge dynamics of a train coupler device, relating to the field of rail transit vehicle collision safety technology. The method includes: establishing a structural discretization criterion; identifying failure modes of the coupler device under different collision conditions, extracting key mechanical parameters, generating a master list of plastic hinges, and obtaining benchmark simulation data for model verification; based on the discretization criterion and the master list of plastic hinges, discretizing the coupler device into a multi-body system topology consisting of several rigid bodies connected by kinematic pairs; simulating plastic deformation and fracture behavior based on the multi-body system topology; assembling and solving the system dynamic equations to obtain the dynamic response of the coupler device during the collision process and determining the simulation results; and verifying the accuracy of the multi-body dynamics model and evaluating computational efficiency by comparing the simulation results with the benchmark simulation data. This invention significantly improves the depth of collision safety assessment.

This invention relates to the field of building earthquake resistance and disaster reduction technology, specifically a prefabricated self-resetting artificially controllable plastic hinge joint structure and construction method. By providing an extension on the back side of the first and second end steel plates, an internally threaded sleeve used to fix the longitudinal reinforcing bars in the beam can be connected. This allows the number of SMA bars between the upper or lower ends of the first and second end steel plates to be consistent with the number of longitudinal reinforcing bars in the beam, and can be flexibly arranged according to actual conditions. A connecting component is provided between the first and second end steel plates, greatly improving the tightness of the connection system in the energy-dissipating component and the convenience of installation and disassembly. The energy-dissipating component between the first and second end steel plates improves the overall energy dissipation capacity, i.e., the earthquake resistance.

The application belongs to the technical field of civil engineering damping structure, and particularly discloses a self-resetting bionic steel hinge assembled RC frame structure and an assembling method thereof, the RC frame structure comprising a prefabricated column layer, a prefabricated beam, a bionic column hinge, a bionic beam hinge and a prestressed rod group, the bionic column hinge comprising a thigh boot and a shank boot, and the bionic beam hinge comprising a thigh connecting piece and a shank connecting piece. The bionic column hinge and the bionic beam hinge are used as connecting nodes between column bodies and between beams and columns, the bionic column hinge and the bionic beam hinge can bear bending moment and have good rotating capacity according to the characteristics of a plastic hinge, the thigh connecting piece, the shank connecting piece and the second energy dissipation plate in the bionic beam hinge respectively imitate the femur, the tibia and the ligament of a knee joint, and play the roles of supporting body weight, absorbing impact, keeping balance and providing flexibility, the thigh boot and the shank boot of the bionic column hinge simulate the femur and the tibia of a knee joint, and form a rotating mechanism cooperating with the ligament simulated by the first energy dissipation plate to perform stretching, flexing, internal and external rotation and locking movements.