Research On Seismic Performance Of Fabricated Composite Wall Panel And H-shaped Steel Frame Structure

Fabricated steel structure is an important direction of my country’s construction development.However,my country’s research on the seismic performance of fabricated steel structures is not thorough,and its engineering application is still far behind the advanced level of foreign countries.Therefore,it is urgent to carry out a systematic research on the seismic performance of fabricated steel structures.In this paper,low-cycle reciprocating load tests are carried out to study the synergistic seismic performance of the main structure and external wall panels in the fabricated composite wall panel steel frame structure.And using the finite element numerical simulation method,the influence of the axial compression ratio,concrete strength,wall thickness and other parameters on the overall seismic performance of the structure is analyzed.The main conclusions are as follows:(1)Through the low-cycle reciprocating load test of the fabricated composite wall panel steel frame structure,and the analysis of the hysteresis curve,skeleton curve,energy consumption,ductility and other seismic performance indicators of the test piece,it is obtained that the wall panel and the wall under the horizontal load The failure process of the steel frame structure system,and the mechanism of action between the wall panel and the steel frame.The results show that under the action of horizontal load,the wall panels and the steel frame work together to strengthen the energy dissipation capacity of the steel frame system and slow down the strength degradation of the steel frame.(2)Through the establishment of a finite element numerical analysis model of the fabricated composite wall panel steel frame structure,on the basis of model verification,the influence of the strength of steel and concrete,the thickness of the wall panel and the axial compression ratio on the seismic performance of the structural system is analyzed.The results show that the thickness of the wall panel will increase the lateral rigidity,horizontal ultimate bearing capacity and seismic performance of the structure system,but the concrete strength of the wall panel has a limited influence on the lateral rigidity and ultimate bearing capacity of the structure.(3)The research on the steel frame structure of the fabricated composite wall panel shows that the wall panel will affect the horizontal lateral stiffness of the system.When designing a fabricated structure using composite wall panels,the impact of wall panel hanging methods on the seismic performance of the structural system should be considered.