不同阻尼矩阵建模对超高层结构地震反应分析的影响  

Effects of Damping Matrix Modeling on Seismic Responses of Super High-rise Structures

作　　者：楼梦麟[1] 隋磊[1] 沈飞 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]中国海诚科技股份有限公司,上海200092

出　　处：《结构工程师》2013年第1期55-61,共7页Structural Engineers

基　　金：科技部国家重点实验室基础研究项目(SLDRCE08-B-01)

摘　　要：阻尼作为结构动力响应分析中最重要的参数之一,是结构振动中描述能量耗散的指标。针对有限元软件中通用的Rayleigh阻尼模型的比例系数合理取值展开讨论。在线性动力分析中提出一种阻尼比例系数的计算方法,并以振型叠加法所得结果作为精确解,验证该方法的适用性。最后将该方法引入弹塑性地震反应分析。结果证明本文提出的确定阻尼比例系数的计算方法,在线性及非线性动力分析中均具有一定适用性,为建立合理的Rayleigh阻尼矩阵提出一种新思路。As one of the most important parameters in the structural dynamic analysis, damping is an indicator of the energy dissipation during structural vibration. Based on the Rayleigh damping model that is commonly used in the finite element software, the appropriate value of the damping coefficients was discussed in the paper. A new method was proposed to compute the damping coefficients in linear dynamic analysis. The method is verified by comparing to the mode-superposition approach. It was further found that, from the elasto-plastie seismic response analysis, the new method proposed in this paper can be used for both of the linear and non- linear dynamic analyses, and it can be therefore used to establish the reasonable Rayleigh damping matrix.

关 键 词：瑞利阻尼比例系数 振型叠加法 弹塑性动力分析 结构动力分析 超高层结构 

分 类 号：TU973.2[建筑科学—结构工程]