基岩地震动的一个相干函数模型——倾滑断层情形  

A coherency model of ground motion on base-rock corresponding to dip-slip fault

作　　者：丁海平[1] 刘启方[2] 金星[2] 袁一凡[2] 

机构地区：[1]哈尔滨工业大学,哈尔滨150080 [2]中国地震局工程力学研究所,哈尔滨150080

出　　处：《地震工程与工程振动》2003年第2期8-11,共4页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重大项目(59895410)

摘　　要：本文研究了基岩随机地震动的空间变化规律,考虑了震源破裂速度、子源个数、震源深度和介质传播速度等因素的影响。对应于每个样本,用数值模拟方法计算了采用震源位错模型的弹性半空间近场地震动场,最后通过统计方法给出了一个倾滑断层情形下的近场基岩地震动的相干函数模型。这一方法可以补充常用的统计方法因观测资料有限而导致的欠缺。In this paper, the spatial variation of stochastic ground motions at rock, which considering the factors of rupture velocity, number of subsources, depth of epicenter and propagation velocity, is studied. Corresponding to the elastic halfspace model with dislocation source of fault, nearfield ground motions are calculated by numerical simulation method for every stochastic sample. Finally, a coherency model for baserock site corresponding to dipslip fault by statistic method is proposed. As an additional approach, the method is effective to study spatial variation of ground motions. 

关 键 词：基岩 地震动 相干函数模型 震源破裂速度 震源深度 介质传播速度 数值模拟 统计方法 断层 

分 类 号：TU435[建筑科学—岩土工程] P315.9[建筑科学—土工工程]