全域天线钢结构骨架抗震性能研究与仿真分析

Research and simulation analysis on seismic performance of global antenna steel frame

由于地震的不可预见性以及强震的高破坏性,重要设施设备都要求具有一定的抗震性能。针对工程中对于全域天线钢结构骨架抗9级地震的要求,依据全域天线钢骨架中均采用高强度螺栓连接的特点,对天线钢结构骨架的抗震性能进行了研究。建立了全域天线钢结构骨架的有限元模型。在理论分析的基础上对钢结构骨架分别进行了加速度反应谱分析和时程分析(三条地震加速度条件下)。得到了结构在不同仿真输入条件下的应力反应。通过仿真结果表明,所设计的全域天线钢结构骨架的强度能满足工程的要求。采用的分析与仿真方法对于其他天线结构的抗震性能分析具有一定的参考意义。

Due to the unpredictability of earthquakes and the high destructiveness of strong earthquakes,important facilities and equipment are required to have certain seismic performance.In response to the engineering requirements for the steel structure of the global antenna to resist earthquakes of magnitude 9 and the characteristics of high-strength bolt connections in the steel structure of the global antenna,the seismic performance of the steel structure of the antenna was studied.The finite element model of the steel structure skeleton of the global antenna is established.On the basis of theoretical analysis,acceleration response spectrum analysis and time history analysis were carried out on the steel structure frame(under three seismic acceleration conditions).The stress response of the structure under different simulation input conditions is obtained.The simulation results show that the strength of the steel structure of the designed global antenna can meet the requirements of the project.The analysis and simulation methods used have certain reference significance for the seismic performance analysis of other antenna structures.