砖塔的模态及单点反应谱法动力分析

BRICK TOWER MODAL AND SINGLE-POINT RESPONSE SPECTRUM METHOD FOR DYNAMIC ANALYSIS

首先对禹州市柏山文峰塔进行了用于ANSYS的计算简化,并以古塔的经验自振周期公式计算结果为标准,在ANSYS中通过对弹性模量,密度参数的反复试算确定出合理参数;然后对塔体做10阶模态分析,得出了单点反应谱法所需要的参数:频率和谱值,并用单点反应谱法对塔体进行结构动力分析;接着提取出整个过程中最大位移结点对应的结点坐标,找出这些结点在塔体的位置,这些位置存在于塔的顶部与塔体鞭梢效应相一致;同样找出整个过程中各个应力类型最大值结点对应的结点坐标,统计出这些结点在塔体的位置,总结出了地震作用下古塔最容易损坏部位,从而为古砖塔的保护提供了新的参考角度。

The Yuzhou City Bai Shan of Wenfcng tower was used for ANSYS calculation is simplified, and the experience of Guta self vibration period formula to calculate the result as the standard, in ANSYS by the elastic modulus, density parameters of the repeated tri^d calculations determine reasonable parameters; then the tower 10 order modal analysis, the single response spectrum method the required parameters ： frequency and spectral values, and using single - point response spectrum method for tower structure dynamic analysis ; then extract the whole process of the maxinmum displacement of nodes corresponding to the node coordinates, find the node in the tower body position, the position exists at the top of the tower body and the whiplash effect. Consistent ; also find the whole process all types of stress maximum points corresponding to the node coordinates, statistics of these nodes in the tower body position, summed up under action of earthquake of Guta is the most easily damaged parts, so as to protect the ancient tower provides a new reference point.