Seismic Performance Analysis Of Bolted Assembled Wallboard Structure

The bolted assembled wall panel structure studied in this paper conforms to green building concept proposed in the 14 th Five-Year Plan of China.In this paper,the theoretical design and checking method of bolted assembled wallboard structure are proposed,and the idea of building a simplified structure model is put forward.Numerical simulation and elastic-plastic analysis were carried out on the substructure and the whole structure of bolted assembled wallboard by using the commercial software of rod system finite element to evaluate the seismic performance of rectangular regular structure and downline structural element under the action of rare earthquake with different fortification intensity.The critical wall rate of the structure was summarized and the index of wall rate was determined.The main research contents are as follows:(1)Based on the bolted assembled wallboard structure system,a design method was proposed that the structural members were equivalent to simplified model elements,and the simplified finite element numerical model of wallboard rod system was established.The method of checking the whole and local bearing capacity of wallboard is put forward to check the failure form of wallboard structure.The model is established to simulate the test process,and the simulation results are obtained by defining parameters according to the existing test results.Comparing with the test results,the feasibility of using numerical simulation method to analyze the bolted assembled wall panel structure is studied.(2)The prefabricated members of the 1-3-story rectangular regular structure are designed to check the reinforcement according to the requirements of multiple earthquakes,and the seismic performance of the rectangular regular structure system in different forms is studied and evaluated under the action of rare earthquakes,and then the critical wall rate is summarized.Some factors affecting the critical wall rate of different rectangular regular structures under rare earthquakes are obtained.(3)The lower limit structural units with the plane size of 6.4m×6.4m on the 1st to 3rd floors were studied,and the critical wall ratio of structural units under the action of rare earthquakes was summarized.After comparing the critical wall rate between the lower limit element and the rectangular regular structure,the index of the critical wall rate is further defined,and the influence of bidirectional coupling on the critical wall rate is summarized.Study and summarize the applicability of the provisions on wall ratio in Sichuan Technical Standard for Bolted Prefabricated Concrete Low-rise Buildings(DBJ51/015-2021)to different structural systems(lower limit structural units and rectangular regular structures).