Static And Dynamic Analysis For Evacuated Diagonal Square Pyramid Grids With Pre-stress

As a new space structures, pre-stressed lattice frames is developing in recent years. In order to expand the application Research of pre-stressed lattice frames, this paper propose a evacuated bottom grid structure which set up different forms of pre-stressed cables, analysis on this new pre-stressed lattice frames.Static properties are the basic properties of pre-stressed grid. This paper propose four pre-stressed truss structures, analysis on and comparison the static performance of those structure, discuss the affect of several key design parameters for taking the pre-stressed truss structure of the diagonal square pyramid, and comprehensive analysis of the engineering applied feasibility of those pre-stressed truss structure.Through static analysis, this paper determines the suitable form of pre-stressed truss structure. This paper selects two pre-stressed truss structure of diagonal square pyramid, made mode analysis, analysis of the frequency trends of those structures with pre-stressed by changing different sizes, different grid height, different mesh size, and different height of pre-stressed struts.As in-depth study of the content, this paper use the response spectrum method for those two pre-stressed truss structure of diagonal square pyramid, explore the earthquake Response of the two pre-stressed truss structure. To improve the reliability of the results, this paper use the time history analysis of the two pre-stressed truss structure, On the one hand to verify the results of the response spectrum method, on the other hand to exercise using a variety of methods to analysis and calculation for structural dynamic response.As in-depth study of the content, this paper use the response spectrum method for those two pre-stressed truss structure of diagonal square pyramid, explore the earthquake Response of the two pre-stressed truss structure. To improve the reliability of the results, this paper use the time history analysis of the two pre-stressed truss structures, On the one hand to verify the results of the response spectrum method, on the other hand to exercise using a variety of methods to analysis and calculation for structural dynamic responseFinally, this paper summarize the results of structures, raised several questions of the pre-stressed truss structure of diagonal square pyramid in further study.