Research On The Application Of Composite Wallboard In Prefabricated Steel Structure Building In Highly Earthquake Sensitive Areas

In recent years,many research achievements have been made on the prefabricated steel structure housing system in China.However,the development of prefabricated steel structure composite wall panel still restricts the development of steel structure housing system,and also affects the promotion of building industrialization.At present,most of the composite retaining wall in more,high-rise steel structure under severe earthquake elastoplastic interlayer displacement Angle limit(1/50)will appear under large deformation and loss,should not be used in high-intensity fortification region,sichuan,yunnan,Tibet and other regions for earthquake-prone areas in our country,and for high intensity fortification concentrated area,it is necessary to develop a new wallboard in these areas for application.In this paper,the composite wallboard produced by a company is taken as the research object,and its deformation capacity and seismic performance index under the elastic-plastic layer displacement Angle limit(1/50)in rare earthquakes are tested by tests and numerical simulation,so as to provide references for engineering applications.The main work and conclusions of this paper are as follows:1.The seismic performance test of 5 pieces of composite wallboard was carried out,and the main test parameters were different loading systems,different connection modes,and whether it was connected with the column.Through the test,the failure phenomenon and stress process of each specimen were observed,and the seismic performance indexes such as keel strain,hysteretic loop curve,skeleton curve,energy consumption and ductility of each specimen were analyzed.Based on the test phenomenon and data,the failure mechanism of the wallboard was obtained.The results show that in the elastic stage of the wallboard,the screw rod at the connection of the wallboard is slightly deformed,there is no obvious crack on the wallboard,the energy consumption and ductility are good,which can meet the performance level of the composite wallboard in high-intensity fortification area.2.Finite element analysis of composite wallboard was conducted with finite element software ABAQUS.On the basis of model verification,21 finite element models ofcomposite wallboard were established.Through finite element analysis,the load-displacement curve,failure phenomenon and stress distribution of each specimen are obtained.The results show that the fixed joint composite wallboard has a higher bearing capacity than the sliding joint composite wallboard,but the damage to the joint is more serious,which may cause the wallboard to fall off.The bearing capacity of the specimen increases with the increase of keel spacing,but the lifting range is limited.Different keel section size is an important factor affecting the bearing capacity of specimens.Different keel thickness and wallboard thickness contribute little to bearing capacity,failure phenomenon and stress distribution.3.Based on the test and finite element analysis,and given the construction measures of the composite wallboard in high-intensity fortification,composite wallboard was introduced in detail the overall assembly,composite wall panel and frame beam connections,composite wall panel and frame column of space processing,wall and wall board processing,composite wallboard humanly scaled structure,the composite wallboard,the foot structure,composite wall air conditioning board,etc.