反应谱及其发展方向的探讨

反应谱理论明确而简单地反映地震动特性和结构反应特性双重含义,利用反应谱理论进行结构抗震设计,可以把动力问题简化为静力问题。但难以解决大跨度、现代大型复杂结构的抗震设计以及处理非比例阻尼等情况。应用基于虚拟激励法的功率谱,可以方便地解决上述问题。节省计算时间,同时也避免了求解过程中产生的计算精度误差。

EXPLORATION OF RESPONSE SPECTRUM ANALYSIS AND ITS DEVELOPMENT DIRECTION

The dynamic characteristics of earthquake and structure response can be reflected precisely by the theory of response spectrum. A dynamic can be changed into a static when the theory of response spectrum is used to do the aseismic design of a structure. However it is difficult to conduct the aseismic designs of modern and large complicated structures with long spans, and deal with non proportional damping etc. Using power spectrum based on pseudo excitation method can solve the above problems and save time. Meanwhile the computing errors can also be avoided during the process of solutions.