分析相互作用体系随机临界地震响应的摄动法

RANDOM CRITICAL SEISMIC RESPONSE ANALYSIS OF SOIL-NONLINEAR SDOF INTERACTION SYSTEMS

本文应用随机摄动法分析了地基土-非线性单自由度结构相互作用体系的随机临界地震激励和对应的临界地震响应,导出了相应于平稳高斯过程的有关计算公式。作为算例,计算了一水塔结构的随机临界地震响应,结合干稳过滤白噪声随机地震动模型,计算了水塔的地震响应,并与其随机临界地震响应作了比较,从而对随机临界地震响应分析法的可靠性作了进一步的定量评估。

In this paper, the authors analyze the random critical seismic response of soil-nonlinear SDOF interaction systems using peturbation method. The theoretical formula is conducted to interaction systems under the Gaussian stationary random seismic excitation. As a numerical example, the authors analyze the random critical seismic response of a water tower,and by comparison with the response of the structure under the stationary filter with noise excitation, the mothed of random critical seismic response is evaluated.