The Research On The Damage Factors And Vulnerability For Reticulated Shell Structure Under Seismic Action

Starting from the thought about preventing disasters and reducing damages as the main way to anti-knock,based on the finite element theory,the paper adopts the numerical simulation method to analyze the earthquake security risks about construction structure which is the major way to make the research for construction structure anti-quake.Recently,for the studying about vulnerability of construction structures’ framework structure,we gained abundant theories results.However,the researches about space latticed shell are quite limited.Latticed shells are preferred by human and used to the public buildings for their elegant form.Thus,they have significant social meaning and value and play a special important role in studying anti-quake theories and analyzing earthquake security risks.This paper based in large-scale general finite element ABAQUS software platform,expands the research and analysis about latticed sheel quake vulnerability,the main research contents and results show as following:1.Firstly,it elaborates the main analysis principals and flow of ABAQUS software.With the virtue of CAD software to introduce the geometric model,it completed Kewitte latticed shell to model on ABAQUS platform as well as pressed ahead he modal analysis.Based on the results of modal analysis,it analyzed the structural dynamic behavior.It concluded that this kind of structure mainly generate the horizontal vibration and it also solves the structural damping coefficient by abstracting the inherent frequency.2.Based on the damage weighted,the damage model establishing theories calculate its weight coefficient according to the member bar contribution value,consider the member bar damage by member bar integration point yield quantity,as well as launch latticed shell integrated damage factor though damage weight.Applying ABAQUS finite element analysis damage,it make the analysis about K8 monolayer spherical surface latticed shell’s increment dynamic and time histories and calculates the structural damage for various quake strengths.The results examined the rationality if structural damage model in this paper.Under this condition,it also proposed the monolayer latticed shell’s damage factor demarcations of different damage levels.3.Pressing ahead the earthquake vulnerability of monolayer latticed shell,it selected 50 quake waves to make the IDA increment dynamic analysis for structural model.Through 50groups’ data of the quadratic regression,the author utilized quake vulnerability fundaments to establish quake vulnerability functions as well as gained the latticed shell quake vulnerability curve.They gained the curves by 30 samples,40 samples and 50 samples respectively.Then,the author make the comparison for these results.Finally,it concluded that results generated from 40 samples is the most proper one to analyze latticed shell quake vulnerability.