关于土层地震反应分析中阻尼矩阵建模方式的讨论  

Discussion on modeling method of damping matrix in seismic response analysis of soil layer

作　　者：殷琳 楼梦麟[2] 康帅[3] YIN Lin;LOU Menglin;KANG Shuai(School of Civil and transportation Engineering,Ningbo University of Technology,Ningbo 315016,China;School of Civil Engineering,Tongji University,Shanghai 200092,China;School of Civil Engineering and Architecture of Henan University,Kaifeng 475001,China;Zhejiang Research Center of Civil Engineering Industrialized Building Construction Technology,Ningbo 315000,China)

机构地区：[1]宁波工程学院建筑与交通工程学院,浙江宁波315000 [2]同济大学土木工程学院,上海200092 [3]河南大学土木工程学院,河南开封475001 [4]宁波工程学院浙江省土木工程工业化建造工程技术研究中心,浙江宁波315000

出　　处：《世界地震工程》2019年第2期132-140,共9页World Earthquake Engineering

基　　金：宁波市自然科学基金(2015A610303);浙江省教育厅一般科研项目(Y201533463);王宽诚教育基金会资助项目

摘　　要：阻尼矩阵的选择对土层时域内地震反应计算的准确性有重要意义。本文构造了质量比例阻尼、刚度比例阻尼、Rayleigh阻尼、Caughey阻尼和Clough阻尼矩阵,研究各阻尼对土层地震反应分析精度的影响。以苏通大桥5号桥塔基础处的工程场地为例,分别以人工合成基岩波,Northridge波、Parkfield波和汶川波为输入,得到不同阻尼模型下土层的地震反应,结果表明Clough阻尼在计算精度和误差稳定性上要优于其他阻尼模型,针对Clough阻尼的不足之处提出了改进方法,算例表明改进后的Clough阻尼能在保证计算精度的前提下减少计算机的存储量和计算量。Damping matrix is very important to accuracy of seismic ground response analysis in time domain.The damping matrices corresponding to mass-proportional damping,stiffness-proportional damping,Rayleigh damping,Caughey damping and Clough damping were constructed to study their influence on the accuracy of the seismic response analysis of the soil layer.Taking soil layerat No.5 tower of Sutong bridge as an example,the seismic responses of the soil layer with different damping models were computed by using artificial bedrock waves,Northridge waves,Parkfield waves and Wenchuan waves as inputs.The results show that Clough damping can reduce error of seismic response analysis and improve error stability,and is superior to other damping models in computational accuracy and error stability.An improved method was proposed for the deficiency of Clough damping.The improved Clough damping can reduce the storage and computational quantity of the computer on the premise of ensuring the computational accuracy.

关 键 词：土层地震反应 时域分析 阻尼矩阵 改进的Clough阻尼 计算量 

分 类 号：P315.9[天文地球—地震学]