多维地震动作用下非对称结构扭转耦连随机反应分析  

Torsionally Coupled Random Response Analysis of Asymmetrical Structures under Multi-Dimensional Seismic Actions

作　　者：李宏男[1] 王苏岩[2] 

机构地区：[1]大连理工大学 [2]沈阳建筑工程学院

出　　处：《建筑结构学报》1992年第6期12-20,共9页Journal of Building Structures

摘　　要：工程结构的随机地震反应分析,常在频域中用到地震动的功率谱密度函数。本文应用作者提出的地震动的转动功率谱数学模型,对非对称结构进行了随机反应分析。从多维地震动输入下的结构三维振动方程出发,给出了结构多维随机振动的振型位移法和振型加速度法。通过数值计算,讨论了扭转分量对结构反应的影响,得到了一些对实际工程有意义的结果。The power spectral density function of earthquake motion is usually used for the random response analysis of engineering structures in the frequency domain. In this paper, by use of the mathematical models of rotational power spectra, the random response analysis of asymmetrical structures have been carried out. From the equation of three-dimensional vibration of structures,the methods of multi-dimensional random mode displacement and mode acceleration have been put forward. Finally, some conclusions with practical significance in engineering have been drawn through numerical examples and the effects of rotational components on structural response have been discussed.

关 键 词：地震 非对称结构 随机分析 

分 类 号：TU311.3[建筑科学—结构工程]