Research On Seismic Performance Of Hollow Inner-Formwork Cement Wall Panel-Steel Frame Structure System

With the rapid advancement of building industrialization,steel structure buildings are flourishing and various related researches are emerging,but there are relatively few researches on steel structure building enclosure system.As an important part of the building envelope system,walls are of various types and different performance,but they are often constructed in a rough way because they are secondary structures,and the connection performance with the main structure is often not guaranteed.In this paper,we introduce a new type of wall panel-hollow inner-formwork cement wall panel,and use this type of wall panel as the enclosure member of steel frame,and conduct a more indepth test and theoretical research on the seismic performance of the wall panel-frame structure system.The main work and results are as follows.Combined with the development status of seismic performance of steel structure building enclosure system,the connection structure between hollow inner-formwork cement wall panel and steel frame was optimized,and four different embedded connection methods were designed.The pseudo-static tests of 5-bays of full-scale specimens were carried out,among which 1-bay was a steel hollow frame specimen and 4-bays were steel frame specimens with embedded wall panels.The test phenomena were observed,the force and deformation data of the specimens were monitored,the damage characteristics of the specimens were recorded,and the order of plasticity development of different specimens was analyzed.It was found that the damage of the wall panel was mainly concentrated around the corners of the wall panel and the connections,and the connection quality and installation accuracy had a greater influence on the synergistic force characteristics of the wall panel and the frame.The seismic performance of the structural system was comprehensively evaluated by analyzing the hysteresis curve,skeleton curve,load and displacement characteristic values of the test,as well as the lateral stiffness,ductility coefficient and energy dissipation parameters of the specimens.The numerical simulation of the steel frame structure with embedded wall plates was carried out by using ABAQUS finite element analysis software,and it was found that the calculation results of the finite element model established in this paper were in good agreement with the test results,which verified the reliability of the finite element method to analyze the seismic performance of the structural system.Based on the experimental simulation,further parametric analysis of the structural system was carried out to investigate the effects of different connection configurations,thickness of embedded wall panels,strength of wall panel filler,strength of frame steel and other parameters on the seismic performance of the structural system.