Seismic Analysis Of Prefabricated Exterior Board Of The Assembled Frame Structure

In the past decades,due to the lag of technical specifications and the occurrence of natural disasters such as earthquakes,resulted in a trough period in the development of the fabricated structure.However,in recent years,with the breakthrough of the research on the assembly structure,the development of the housing industry and the environment pollution of the cast-in-situ structure.The assembled structure gets another chance of development.This paper studies the response of the fabricated external wallboards for RC frame structure under the seismic action.The main work is as follows:1.The current research status and stress analysis method of external wallboards under seismic action are summarized based on the research status of external wallboards at home and abroad.2.In two treatment methods with external wallboard as non-structural member and structural member respectively,SAP2000 calculation software is used for elastic-plastic time history analysis of the basic models of three reinforced concrete frame structures with different layers and the contrast model of the weak layer with different floors under the action of frequent earthquake and rare earthquake in order to obtain the seismic response of external wallboards.3.Under the action of frequent earthquake,the analysis and calculation results show that the structure is basically elastic,and the seismic action of the external wallboard is less than the design value stated in the relevant specifications,which indicates that the specifications are conservative.However,since the external wallboard is not a common non-structural member,strength design only based on action of the frequent earthquake cannot meet the seismic safety requirements.4.Under the action of rare earthquake,the analysis and calculation results show that some structural members are plastic,and the seismic action of many external wallboards is greater than that under the action of frequent earthquake and also greater than the design value set forth in the specifications under the action of frequent earthquake.Therefore,the connection reliability of external wallboard is low.Failure and fall-off of any external wallboard will pose threat to safety of life and property.Hence,it is necessary to consider the connection strength and ductility structure measures of external wallboard in the event of rare earthquake.5.The seismic response of external wallboards should vary at different positions.For the wallboard above structure,it is important to ensure the connection strength due to large seismic action;for the wallboard below the structure,although the seismic action is small,the relative displacement between layers is large,and the connection construction should be provided with more effective guarantee measures.