高耸电视塔结构的抗震计算新方法  

A New Method for Structural Aseismatic Computation of Tall TV Tower

作　　者：张洵安[1] 姜节胜[2] 赵银燕[2] 

机构地区：[1]西北工业大学土木建筑工程系 [2]西北工业大学振动研究所,陕西西安710072

出　　处：《西北工业大学学报》2000年第2期179-182,共4页Journal of Northwestern Polytechnical University

摘　　要：基于随机振动的复模态理论 ,提出了三维非平稳地震作用下 ,高耸电视塔结构抗震计算的一种新方法。该方法解决了反应谱法在该类结构抗震计算中存在的问题 ,具有高的计算精度 ,并对洛阳电视塔进行了计算 。In Ref.[2], we studied the response property of tall TV tower under three dimensional non stationary random seismic excitation. In this paper, we present a new method for structural aseismatic computation. On the basis of Ref.[2], we derived eqs.(9) through (11) for computing the evolutionary spectral densities and mean square responses of structural internal forces. Using these equations, we did structural aseismatic computation for Luoyang TV tower. The results (Figs.3 through 5) show that our method is more accurate than the response spectrum method. They also show the obvious influence of the higher order system mode shapes on the structural random internal forces.

关 键 词：高耸电视塔 非平稳随机振动 抗震计算 

分 类 号：TU248.8[建筑科学—建筑设计及理论] TU311.4