摘要
利用随机振动理论,分别考虑3种地震动随机过程模型,本文对反应谱变异系数及相关问题进行了深入分析。研究结果表明:在一定范围内,地震动模型、场地条件和结构体系阻尼比对结构加速度反应越零率有明显影响,但这三者对反应谱变异系数的量值影响不大。在工程设计中,可以采用白噪声模型按本文给出公式计算反应谱变异系数。
Based on the random vibration theory, the present paper analyzes the variation coefficients and relevant problems of response spectra. Three kinds of random earthquake ground motion models are considered respectively. The obtained results show that, in a certain range, earthquake ground motion models, site conditions and structural damping ratio have much influence on the zero-crossing rate of acceleration response of a structure, but have little effect on variation coefficients of response spectra. In the engineering designs the variation coefficients of response spectra can be computed by directly utilizing the white noise model according to the given formulae.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第2期36-41,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家杰出青年科学基金(59825105)
国家自然科学基金委创新研究群体(50321803)
关键词
地震动
反应谱
变异系数
随机过程模型
response spectrum
random process model
variation coefficient
