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地震动标准差谱与反应谱的初步研究

发表时间:2014-07-31  浏览量:1326  下载量:591
全部作者: 彭凌云,黄金
作者单位: 北京工业大学工程抗震与结构诊治北京市重点实验室;国核电力规划设计研究院
摘 要: 为将地震动反应谱应用于结构随机响应的标准差分析,提出地震动标准差谱的概念,即随机地震过程作用下,不同阻尼比的单自由度结构响应标准差的最大值随结构周期变化的谱曲线。基于均匀调制模型,通过蒙特卡洛方法考察了汶川地震和集集地震收集的加速度记录标准差谱与反应谱的比值关系。统计结果表明:标准差谱与反应谱具有明显的统计规律,并得到了标准差谱与反应谱的转换关系,并据此得到与规范反应谱对应的标准差谱,进而建立振型分解标准差谱方法求解结构动力响应的标准差。
关 键 词: 土木建筑结构;地震动;标准差谱;反应谱;振型分解
Title: Preliminary study on the seismic standard deviation spectra and response spectra
Author: PENG Lingyun, HUANG Ji
Organization: Key Lab of Engineering Earthquake and Structure Retrofit, Beijing University of Technology; State Nuclear Electric Power Planning Design & Research Institute
Abstract: In this paper, the concept of seismic standard deviation spectra is proposed, which is the spectra curve with the characterization of the peak response value of a structure of single degree of freedom input by a stochastic seismic process changing with the period of this single degree of freedom (SDOF) structure. The standard deviation spectra can be used to computer structural standard deviation response, based on the uniform modulation model of earthquake process and the Monte Carlo method, the statistical analysis on the relationship between standard deviation spectra and response spectra of the acceleration records attained during Wenchuan earthquake and Chichi earthquake is performed. The results indicate that the correlation between standard deviation spectra and response spectra is very high, and the statistical converse formula from response spectra to standard deviation is given out. It can be used to establish the standard deviation spectra according to the code-response spectra curves, and attain the structural standard deviation response by mode decomposition of standard deviation spectrum method similar to mode decomposition of response spectrum method.
Key words: civil building structure; earthquake ground motion; standard deviation spectra; response spectra; mode decomposition
发表期数: 2014年7月第14期
引用格式: 彭凌云,黄金. 地震动标准差谱与反应谱的初步研究[J]. 中国科技论文在线精品论文,2014,7(14):1379-1385.
 
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