Dynamic Response Analysis Of Large-span Structures In Mined Out Area

Based on structural dynamics and finite element theory as the theoretical basis,with single-layer workshop structure as the research object,the finite element software ANSYS,single-layer workshop structure is studied through structural simulation analysis of component in goaf under the condition of dynamic response characteristics.Select different peak ELCENTRO,Taft wave and nanjing wave load computation,it is concluded that the dynamic response characteristic of the model and the deformation characteristics,provides some reference for such research.This paper study the conclusions are as follows:1,the four models respectively applying horizontal and vertical ELCENTRO wave,Taft wave,nanjing after the wave,concluded three maximum horizontal displacement of the structure under seismic waves increases with the increase of peak acceleration and the maximum vertical displacement of a structure also increases with the increase of peak acceleration.Position and the maximal displacement of the four models are the same: horizontal displacement occurs in the fourth largest post,at the top of the vertical displacement occurs in the fifth,six pillars plate across.2,contrast ELCENTRO,Taft wave,nanjing wave effect on the displacement of structure: the three seismic waves from the horizontal,three of the same peak wave,the horizontal displacement value of nanjing under wave loading structure in the three wave maximum,so the horizontal wave to nanjing for three seismic waves in the worst wave of structure;From the vertical,the three waves of the same peak,Taft wave load of the structure under horizontal displacement for the three biggest wave,so the vertical Taft wave for the three seismic waves in the worst wave of structure.3,the contrast of model 1 and model 2 levels of maximum displacement and maximum vertical displacement,the same direction of the same peak wave of model 2 load of horizontal displacement and vertical displacement were greater than model 2,so it is concluded that,the seismic performance of single-layer workshop structure will have a certain degree of reduced with the increase of span,should particularly strengthen the seismic fortification of large span factory building structure.