Study On Seismic Behavior Of Prefabricated Composite Wallboard And Its Filled Steel Structure

In recent years,the Chinese government has vigorously promoted the industrialization of prefabricated buildings and residential buildings,and encouraged the coordinated development of green and energy-saving buildings and prefabricated buildings.The prefabricated steel structure building has light weight and green environmental protection in the process of use.At the same time,it has excellent seismic performance under the action of earthquake.However,the research on the supporting system of prefabricated steel structure buildings is relatively scarce,and the traditional walls are easy to be damaged under the action of earthquake,and the performance of fire prevention and heat insulation is poor.Therefore,it is very important to study the mechanical properties of wall panels for the popularization and application of prefabricated steel structure buildings.However,there are many shortcomings in the existing assembled wall panels,including the traditional wall panels with large thickness,heavy mass and poor heat insulation performance.Aiming at these disadvantages,a company has developed a new type of composite wallboard,because the relevant seismic performance of the wallboard under the action of earthquake research is still insufficient.Therefore,this paper mainly takes the wallboard as the main research object,through the test and numerical simulation analysis,to investigate the stress characteristics and working performance of the wallboard under the action of earthquake,to verify the feasibility of the wallboard,but also to provide reference for the practical application of the project.The work and research results of this paper are as follows:(1)The pseudo-static tests were carried out on 4 trusses of single-span full-scale specimens,and the relevant performance indexes of the composite wall panels were obtained through the tests.(2)The ANSYS software was used for finite element analysis of the structure,and the relevant results obtained by simulation were compared with the failure form,skeleton curve and stiffness degradation curve of the specimen.(3)On the basis of simulation,the parameter analysis of the structural system of hinged steel frame with composite wall panels is carried out,and several important parameters such as thickness of wall panels,ratio of height to width and number of wall panels are mainly analyzed and studied.(4)A simplified mechanical model was established for the prefabricated structural system under horizontal seismic load,and a simplified calculation formula for the ultimate bearing capacity of articulated steel frame composite wall panels was derived.(5)Establish the pure steel frame model and the steel frame residential structure model with composite wall panels,and input the seismic waves to the two models respectively for comparative analysis.