Finite Element Simulation On Seismic Performance Of Assembled Shear Wall With Concrete-filled Steel Tube

Prefabricated buildings have the advantages of low energy consumption,high environmental protection,saving construction time,significant earthquake resistance,etc.,and have broad application prospects in the field of construction engineering.However,in the field of actual engineering,prefabricated buildings account for less than 5% of new buildings in the country,and there are few experimental research materials,and various technical specifications are also rarely reflected.Therefore,this topic is based on the domestic research achievements.The foreign research results,through the pseudo-static simulation of the concrete-filled steel tube shear wall,analyze the force,ductility,and seismic performance,and provide data support and theoretical basis for the future assembled structure of the combined structure.The main contents of this paper are as follows:(1)Consult the literature on the seismic performance of fabricated shear walls to learn about domestic and foreign improvements to improve the seismic performance.This paper summarizes the effects of various design methods on improving the seismic performance of shear walls,and puts forward the structural scheme of sawtooth connection between the wall bottom and the ground beam,replacing the vertical distribution of steel bars with steel pipes,and built-in concrete-filled steel tubular shear walls.(2)Through the finite element analysis software ABAQUS,the finite element model of the assembled concrete-filled steel tube shear wall with the dimensions of1100 mm × 2480 mm × 200 mm was established,and the simulation was carried out under the action of low-circumferential resetting and moving load,and compared with the failure mode of the traditional cast-in-place shear wall The analysis proves the feasibility of this analysis model through the comparison of hysteresis curve,energy dissipation capacity,ductility,and degenerate stiffness.(3)By changing the influencing parameters such as axial compression ratio,concrete strength,reinforcement ratio,and steel tube diameter,the influence on the assembled concrete-filled steel tube shear wall is analyzed.The results show that according to reasonable parameter design,the assembled steel tube shear wall structure has a higher bearing capacity,good ductility and energy dissipation capacity,strong earthquake resistance,and meet the seismic performance design.(4)Verify the bearing capacity formula,and compare with the model value,the result verifies the accuracy of the calculation.(5)Finally,a comprehensive review of the entire research process is carried out,summarizing the problems that have not been perfected in the research process and possible problems,and providing suggestions for future research.The research shows that: from the aspect of construction,the construction of the wall is convenient,which is beneficial to shorten the construction period.In terms of mechanical performance,the failure form of the wall is buckling and failure,and various types of seismic performance indexes have been improved,while meeting the seismic design requirements;the deformation ability is strong,the ductility is good,and it can be maintained under periodic earthquakes.Relatively stable bearing capacity.