作　　者： ; ; ; ;

机构地区： 哈尔滨航天风华科技股份公司

出　　处： 《地震工程与工程振动》 2005年第6期5-11,共7页

摘　　要： 本文通过一个简单的示意性算例,对近断层强地面运动影响场显式有限元数值模拟的主要环节作了概要说明,给出了算例的主要计算结果并对其作了定性和初步的讨论分析。主要观点和结论是:本文的计算结果较好地定性反映和印证了人们对近断层强地面运动特征(如上盘效应、竖向效应、F ling Step效应和速度大脉冲现象)的现有认识水平,验证了采用的计算模型和计算方法的可行性和科学性。本文关于位移峰值场的计算结果对于估算近断层地表破裂带的位置、长度和宽度具有重要参考价值,应进一步深入研究二者之间的相关性。 In this paper, the process in simulating near-fault ground motion field by explicit finite as well as the main simulating results and the preliminary qualitative analysis, is given through an element method, illustrative exampie. The main viewpoint and conclusion is that, on the one hand, the simulating results give a qualitative validation and illustration on the characteristics of near-fault ground motions we have known, for example, the hanging wall effect, the perpendicular effect, the fling step effect and the big velocity pulse effect; on the other hand, the simulating results also validate the feasibility and rationality of the adopted models and methods. The simulated displacement peak ground motion field has the referential importance for the prediction of the location, length and width of the surface rupture zone in near fault. The correlation between the two factors should be studied further.

关 键 词： 强地面运动影响场 显式有限元 数值模拟 强地面运动特征

领　　域： [天文地球] [天文地球] [天文地球]