Study On Influence Distance Of Seismic Overall Collapse Of Building Structure By Simulation Technology

The destruction and collapse of buildings is the main destruction form in the earthquake. In the previous earthquake, the collapse of the building not only caused a serious loss of life and property, but also the accumulation of debris produced by the collapse of the buildings after the earthquake along the street would also cause traffic jams and seriously affect the relief work. Therefore, how to determine the influence range of the collapse of buildings under earthquake is the core and key of all the problems. Combining the seismic data, this paper based on the simulation technology will research and analysis this part, and the main research contents are as follows:(1) Based on a large number of seismic damage, especially buildings seismic collapse datas, the collapse mechanism of different types of building stsructures were analyzed, and the relationship between different buildings collapse mode were combing, and the influence degree of the different modes of collapse of buildings were analyzed, and pointed out that the overall collapse as a complete collapse failure mode caused a greater influence degree.(2) Accumulating the basic theoretical knowledge of the simulation analysis software to carry on the analysis of the collapse, including the key step of simulation analysis, calculating process, basic algorithm, the material constitutive relationship, and the choice of the ground motion and so on. On the basis, through reasonable selection of material model and parameters, the overall process of progressive collapse of five story masonry structure under multiple earthquake were coming true. The calculation results were summarized and comparatively analyzed, the direction of structural seismic collapse was discussed and studied, and the formation of the accumulative debris after the collapse of the structure were statistical analyzed, pointing out the statistical difference between the entire element and the active element.(3) For the purpose of this paper, a n experiment scheme was designed with different models and different seismic conditions. Through a lot of calculation, it was concluded that a lot of masonry structure seismic overall progressive collapse failure process. According to the calculation results, the influence distance of earthquake collapse of building structure was divided into two parts,safety distance during earthquake and main influence distance of debris accumulation distribution after earthquake, and statistical research on the two parts respectively. Using a variety of probability distribution models to test the main influence distance distribution of the debris accumulation after the earthquake, the probability evaluation model of the main influence distance of debris accumulation was obtained. In addition, the key parameters(volume ratio coefficient) of debris accumulation was studied at the same time.