Response-Spectrum-Based Analysis for Generally Damped Linear Structures
When civil structures are equipped with earthquake protective systems such as damping devices and base isolators, they are likely to be non-classically damped. In addition, when the overall damping is increased to a certain level, some modes will become over-damped. In such cases, the conventional treatment by using the classical damping assumption (ignoring the non-classical damping effect and the over-damped modes) may result in unacceptable design errors on the unsafe side. Based on the general modal response history analysis formulation with over-damped modes developed by the authors (Song et al. 2008), this paper further extends it to a response-spectrum analysis approach and proposes a general modal combination rule GCQC. Examples to examine the accuracy and effectiveness of this approach are also given.
Response spectrum Generally damped linear structures Seismic analysis Over-damped modes
J. Song Y. Chu Z. Liang G.C. Lee
Dept. of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, USA
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）