随机临界地震响应分析

Random Critical Seismic Analysis

本文利用传递矩阵法,针对柔性地基基础与多自由度上部结构相互作用体系,导出临界地震激励和系统临界响应的计算公式。编制程序计算了一座80m高的钢筋混凝土烟囱。烟囱的计算分析不仅包括刚性基础与柔性基础对临界地震激励和响应影响的比较,而且结合平稳过滤白噪声随机地动模型,对随机临界地震响应分析法的可行性作出定量评价。

in this paper, by means of transfer matrix method, the calculation formulas of critical seismic excitation and critical responses of the soil-structure interaction system are derived. A computer program is made and a 80 m high reinforced concrete chimney is used. as a numerical example. Numerical analysis includes not only the comparison between super structure with rigid base and that with flexible base, but also the quantitative evaluation for the feasibility of the random critical seismic analysis method, combined with the analysis of stationary filtered white noise ground acceleration random process.