论文部分内容阅读
目前有关超高层结构的地震反应研究大多限于确定性问题。分别选用上海抗震设计反应谱和软土场地拟合反应谱作为目标反应谱,用迭代方法求取与目标反应谱相对应的功率谱密度函数,按Clough-Penzien平稳随机地震动模型拟合并给出相应谱参数,采用Ansys软件建立上海某超高层建筑结构的三维有限元分析模型,以文中拟合的平稳随机地震动功率谱密度作为输入,对超高层结构进行了随机地震反应分析,探讨了不同类型的随机地震作用下超高层建筑结构地震反应的差异、以及结构的功率谱反应随层高的变化情况,得到了有工程参考价值的结果。
At present, most researches on seismic response of super high-rise structures are limited to deterministic problems. The seismic response spectrum of Shanghai seismic design and the fitting response spectrum of soft soil site were selected as the target response spectrum respectively. The power spectral density function corresponding to the target response spectrum was obtained by iterative method. According to Clough-Penzien stationary random earthquake model fitting The corresponding spectral parameters were obtained. The three-dimensional finite element analysis model of a super tall building in Shanghai was set up with Ansys software. Based on the fitted random stationary seismic power spectral density, the random seismic response analysis of the super high-rise structure was discussed. The difference of seismic response of super high-rise building under different types of random earthquake and the change of power spectral response of the structure with the height of the building give the result of engineering reference value.