《Earthquake Engineering and Structural Dynamics》杂志刊登“评价瑞利阻尼对估计工程需求参数的影响”

 
作者：Emrah Erduran
刊物：《Earthquake Engineering and Structural Dynamics》，2012年，41卷第14期，1905—1919页
关键词：瑞利阻尼；工程需求参数；非弹性分析；需求位移；阻尼力；抗弯曲框架
摘要：本文评估了瑞利阻尼模型对两个抗弯曲刚性框架结构建筑物工程需求参数的影响。建立了该建筑结构的二维模型，并对三种不同危险水平下的时程响应进行了分析。该时程响应分析表明：与恢复力相比使用质量比例阻尼会导致过高的阻尼力，从而高估了这两个建筑物的地面需求加速度历程。另一方面，对于九层的建筑物，发现相比于其他阻尼模型，刚度比例阻尼会降低高阶响应导致高层结构产生较小的层间位移需求。瑞利阻尼模型结合了质量阻尼和刚度阻尼部分，能够降低两个建筑物的模态频率产生合理的阻尼力和地面加速度历程，并且没有降低那座九层建筑物的高阶响应。

Evaluation of Rayleigh damping and its influence on engineering demand parameter estimates

Authors: Emrah Erduran
Journal: Earthquake Engineering and Structural Dynamics，Volume 41, Issue 14, pages 1905–1919, November 2012
Key words: Rayleigh damping; engineering demand parameters; inelastic analysis; drift demands; damping forces; moment-resisting frames
Abstract: The effects of Rayleigh damping model on the engineering demand parameters of two steel moment-resisting frame buildings were evaluated. Two-dimensional models of the buildings were created and response history analysis were conducted for three different hazard levels. The response history analysis results indicate that mass-proportional damping leads to high damping forces compared with restoring forces and may lead to overestimation of floor acceleration demands for both buildings.Stiffness-proportional damping, on the other hand, is observed to suppress the higher-mode effects in the nine-story building resulting in lower story drift demands in the upper floors compared with other damping models. Rayleigh damping models, which combine mass-proportional and stiffness-proportional components, that are anchored at reduced modal frequencies lead to reasonable damping forces and floor acceleration demands for both buildings and does not suppress higher-mode effects in the nine-story building.

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.2164/abstract

翻译：徐金英；审核：安鹏