Simulation of ground motion using the stochastic method
Simulation of ground motion using the stochastic method
复制标题
DOI：
10.1007/pl00012553
复制
发表时间：
2003-03-01
影响因子：
2
通讯作者：
Boore, DM
中科院分区：
文献类型：
--
作者：
Boore, DM
一种简单而有效的模拟地面运动的方法是将地面运动振幅谱的参数或函数描述与修改后的随机相位谱相结合，以使运动分布在与地震震级和距震源距离相关的持续时间内。这种模拟地面运动的方法通常被称为“随机方法”。“它对于模拟工程师最感兴趣的高频地面运动（通常，f > 0.1 Hz）特别有用，并且它被广泛用于预测世界上无法获得潜在破坏性地震运动记录的地区的地面运动。这种简单的方法已成功地匹配了各种地面运动措施的地震与地震矩跨越12个数量级以上，在不同的构造环境。该方法的一个基本特征是，它将影响地面运动的各种因素（震源、路径和场地）的已知信息提炼成简单的函数形式。这提供了一种方法，通过这种方法，本卷中其他论文中报道的严格研究的结果可以被纳入实际的地面运动预测。
A simple and powerful method for simulating ground motions is to combine parametric or functional descriptions of the ground motion's amplitude spectrum with a random phase spectrum modified such that the motion is distributed over a duration related to the earthquake magnitude and to the distance from the source. This method of simulating ground motions often goes by the name "the stochastic method." It is particularly useful for simulating the higher-frequency ground motions of most interest to engineers (generally, f > 0.1 Hz), and it is widely used to predict ground motions for regions of the world in which recordings of motion from potentially damaging earthquakes are not available. This simple method has been successful in matching a variety of ground-motion measures for earthquakes with seismic moments spanning more than 12 orders of magnitude and in diverse tectonic environments. One of the essential characteristics of the method is that it distills what is known about the various factors affecting ground motions (source, path, and site) into simple functional forms. This provides a means by which the results of the rigorous studies reported in other papers in this volume can be incorporated into practical predictions of ground motion.