Simulation of Earthquake Motions Consistent with Specified Seismic Risk

本研究的目的是发展一种用于工程结构动力设计的地震荷载评估方法，该方法合理地结合了工程地震风险的概念。本研究的研究结果总结如下：1.提出了一种模拟风险一致地震运动的方法。该方法的主要特点是可以在统一的概率基础上同时确定多个地震动参数。然后，通过提出“危险-一致-震级和距离”的概念对该方法进行了推广，从而将传统的地震危险性分析扩展到多变量技术。对地震学和工程地震学领域的强震预报进行了全面的研究。并对今后的发展提出了适当的指导方针。提出了一种将地表记录的地震运动分解为两个时程函数的方法，一个表示断层破裂过程，另一个表示传播路径的波传播特性。该方法采用复倒谱分析与简化的相位解叠和滤波相结合的方法实现。通过试验研究了钢筋混凝土柱在静力和动力荷载作用下的弹塑性破坏行为，在此基础上建立了钢筋混凝土柱的分析模型并进行了验证。

The objective of this study was to develop a method of evaluation for seismic load to be used in dynamic design of engineering structures in such a way that rationally incorporates the concept of engineering seismic risk. The results of this study are summarized as follows.1. A method of simulating risk-consistent earthquake motions was developed. The main feature of the method is that it can determine multiple ground motion parameters simultaneously on a unified probabilistic basis. The method was then generalized by proposing the concept of "hazard-consistent- magnitude and distance" thereby extending the conventional seismic hazard analysis to a multi-variate technique.2. A comprehensive state-of-the-art was developed regarding the strong motion prediction in the fields of seismology and engineering seismology. A proper guideline for the future development was specified.3. A method was developed for separating the earthquake motion recorded on the ground surface into two time history functions, one representing the fault rupture process, and the other representing the wave transmission properties of the propagation path. The method was realized by combining the use of complex cepstrum analysis with simplification of phase unlapping and filtering.4. Inelastic behavior up to failure of reinforced concrete columns under static and dynamic loads were examined experimentally on which basis its analytical model was developed and verified.