Study On The Seismic Performance Of Energy-consuming Assembly Joint Of Wood And Reinforced Concrete Hybrid Structures And Influence

Prefabricated assembled wood-concrete hybrid structures are a common residential structure in North America.In China,the demand for assembled woodconcrete hybrid structures is growing rapidly as the economy grows and people pay more attention to the improvement of quality of life.The main materials of assembled wood-concrete hybrid structures are wood and concrete.The joints of assembled hybrid structures are closely related to the overall performance of the structure and have a significant impact on the structure.Therefore,the mechanical properties of joints are the most critical elements in structural research.This paper summarizes and analyzes the research results of assembled woodconcrete hybrid structures at home and abroad.It is found that wood-steel filled bolt connections are widely used in wood structures,but their ductility is poor.Mortise and tenon joints have been used in wood structures for a long time,but their load-bearing capacity is low and they are prone to pull-out damage.Therefore,a nodal connection form of energy-consuming assembly hybrid structure is proposed,and based on this,a wood frame mortise and tenon joints is designed as a damping energy-consuming device reinforcement method to improve the overall coordination of its frame structure,which can effectively solve the stability and safety of the existing village wood structure form of building,and also can apply modern wood structure to multi-story housing,exploring a comfortable and environmentally friendly yet economic and durable The paper focuses on joints-filled damping.The paper focuses on the effect of different parameters such as hardness and thickness of joints-filling damping materials and vertical load magnitude on the seismic performance of joints,and verifies that the finite element simulation results are in good agreement through experiments and finite element simulations,and establishes the finite element analysis model of energyconsuming reinforced wood frame structure.In this paper,by completing the proposed static force test and deriving the theoretical model of the nodal mechanism of the joint member of the wooden column and reinforced concrete beam connection under the design assembly method,and conducting the simulation work of the proposed static force model of the nodal model of the wooden column and reinforced concrete beam structure of the finite element model,the monotonic loading of the frame nodal model and the low circumferential repeated load loading,the following conclusions are mainly obtained:1.assembled wood and reinforced concrete beam flexible assembly joint failure damage state are:(1)the column foot part of the tensile lifting state,compressive yield state;(2)the rubber is mainly compressed compression deformation damage,which damage appears with the rubber hardness has a certain relationship,in the displacement load is certain,the smaller the hardness of the rubber compression deformation is greater;(3)the bottom of the concrete beam embedded groove by the compressive stress of the column foot appear concrete compressed damage state.2.The hysteresis curve of the assembled wood and reinforced concrete beam flexible assembly joint was loaded with repeated low circumferential loads,and it was found that the hysteresis curve showed a Z-shape,and the hysteresis curve pinching pattern was more obvious as the hardness of the damping material filled in the joint decreased.3.By comparing the finite element model simulation model with the experimental model,the two are in good agreement,and the mechanical properties of the joint are calculated and analyzed,and it is found that the vertical load size and the hardness of the filling material have a great influence on the joint load carrying capacity,stiffness and ductility.4.Finite element simulation analysis of the wood frame structure with energy dissipation assembly joints found that the mortise and tenon joints with energy dissipation devices installed showed a reduction in tenon pullout under the load,and the better the effect of limiting tenon pullout when the hardness of the damping material in the middle layer of the energy dissipation devices was increased.5.The mechanical properties of the wood frame structure of the energy dissipative assembly joints were significantly affected by the applied vertical load.Under the condition that the hardness of the damping material remains unchanged,an increase in vertical load will lead to a decrease in the load carrying capacity of the structure,and the structure will enter the yield state earlier,but the energy dissipation capacity will be enhanced.6.The energy dissipation assembly method can significantly enhance the mechanical properties of the wood structure joints and improve the overall seismic performance of the structure.The adjustment of the damping material parameters can change the bearing capacity,stiffness and energy dissipation capacity of the assembled joints,and realize the controlled design of the seismic performance of the wood structure.