非平稳空间相关多点地震动合成方法研究  

Simulation of non-stationary spatial correlative time histories of multi-point ground motion

作　　者：董汝博[1] 周晶[1] 冯新[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116023

出　　处：《地震工程与工程振动》2007年第3期10-14,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重点项目(50439010);国家自然科学基金面上项目(50378012);教育部重大项目(305003)

摘　　要：根据地震波的传播特点,在现有的非平稳空间相关多点地震动合成方法的基础上进行了改进。通过修正随机相位角,使生成的多点地震动在局部场地上具有收敛性。给出了未知和已知相位差谱统计规律2种情况下非平稳多点地震动的合成方法。进一步提出了基于实际地震纪录的空间相关多点地震动合成方法。这些方法可用于大尺度结构的多点输入分析。The authors expect to histories of multi-point ground establish a series of methods to simulate the non-stationary spatial correlative time motion. An improved simulating method is presented. By modifying the random phase angle, the authors solved the problem in which the time histories of ground motion were not similar when the points were adjacent. Two simulating methods were put forward for the case when the empirical law of phase difference spectrum was known or not. A new method to simulate the time histories of multi-point ground motion by using actual earthquake records was developed. The methods suggested can be used for multi-support excitation analysis of structures.

关 键 词：多点输入 空间相关 非平稳 地震动合成 

分 类 号：P315.052[天文地球—地震学] P315.91[天文地球—固体地球物理学]