Dynamic Response Analysis Of Frame Structures In Mined Out Area

In this paper, structural dynamics and finite element theory as the theoretical basis, and frame structure as an object of study, the finite element software ANSYS be used, numerical simulation and analysis of the dynamic response of frame structures in mined-out area roof rock displacement different initial conditions. Select different peaks of ELCENTRO wave, Taft wave and Nanjing wave calculated the deformation characteristics and the dynamic response characteristics of the model for future such studies provide some reference. In this paper, we have done some analysis work and some conclusions are drawn:1. Without considering the mined- out area roof rock initial displacement, the framework is loaded and calculated different peak values of ELCENTRO wave, Taft wave and Nanjing wave, and the results show that the horizontal displacement of the top of the framework is the largest, and the Nanjing wave is the most unfavorable earthquake wave.2. Considering the mined-out area roof rock initial displacement, the framework is loaded and calculated different peak values of ELCENTRO wave, Taft wave and Nanjing wave, and the results show that the three kinds of seismic waves make the similar horizontal displacement values of the framework in small earthquakes; Nanjing earthquake caused the horizontal displacement of the top of the framework in the middle and large earthquakes, therefore Nanjing wave is the most unfavorable earthquake wave.3. Comparison of the results of the above two cases showed that, according to the maximum horizontal displacement caused by loading in the three seismic waves, it can be drawn horizontal displacement in the small earthquakes produced the greatest difference, followed by moderate earthquake, Large earthquakes minimum. This shows that in the horizontal displacement of framework under the mine-out area of geological conditions at the time of the occurrence of small earthquakes produced relative to the frame structure under conditions of non-mined-out area increases the most obviously, and ELCENTRO wave is the most unfavorable earthquake wave.