随机有限断层法合成地震动及其相干性研究

英文篇名：Earthquake synthesis and its coherence study with stochastic finite faults method
中文刊名：振动与冲击
英文刊名：Journal of Vibration and Shock
作者：王国新 ; 史家平
英文作者：WANG Guo-xin1 ; SHI Jia-ping2(1.State Key Laboratory of Coastal and offshore Engineering ; Dalian University of Technology ; Dalian 116024 ; China ; 2.Dalian Qin Neng Power Design Co. ; Ltd. ; Dalian 116089 ; China)
中文关键词：随机有限断层法 ; 相干函数 ; 加速度时程
英文关键词：stochastic finite faults method ; coherency function ; acceleration time history
出版日期：2010-04-25
机构：大连理工大学海岸与近海工程国家重点实验室;大连秦能电力工程设计有限公司;
年：2010
期：04
出版单位：振动与冲击

摘要

从地震动合成出发,在考虑场地条件、震源参数等影响的情况下,采用随机有限断层法合成了基岩场地相隔一定距离处空间各点的加速度时程,进而研究这些点之间的相干性。研究结果验证了基岩场地相干函数计算模型的合理性;同时说明,随机有限断层法得到的地震动加速度时程能够体现地震动的内在特点,可以将其作为高耸结构、大垮桥梁等重要工程结构抗震分析时的多点地震动输入。
Starting from synthesis of earthquake ground motion and considering site conditions and source parameters,the accelerograms of the bedrock at some specified points were synthesized using the stochastic finite faults method.Then,the strong ground motion coherence among these points was studied.The study results showed that the coherency function model of the bedrock is resonable through comparing the synthesis results;meanwhile,the accelerograms simulated using the stochastic finite faults method can be used as the multi-point input for high-rise structures,long-span bridge and other key engineering structural aseismic analyses.

引文

[1]Abrahamson N A,Schbeider J E.Empirical spatial coherency functions for application to soil-structure analysis.Earthquake Spectra,1991,7(1):1-27.
    [2]Nakamura H,Yamazaki F.Spatial variation of earthquake ground motion based on dense array records[J].Transaction of the13th International Conference on Structure Mechanics in re-actor Technology,1995,3:19-24.
    [3]Qu Tiejun,Wang Qianxin.A Practical Model for Power Spec-trum of Spatially Variant Ground Motion[J].Acta Seismologi-cal Silica,1996.9(1):69-79.
    [4]丁海平,刘启方,金星,等.基岩地震动的一个相干函数模型—倾滑断层情形[J].地震工程与工程振动,2003,23(2):8-11.
    [5]史家平.地震动合成方法比较与研究[D].大连:大连理工大学,2008.
    [6]王国新,史家平.近场强地震动合成方法研究及地震动模拟[J].东北地震研究,2008,24(2):4-10.
    [7]Wang Guoxin,Shi Jiaping.Simulation of Strong Ground Mo-tions of Wenchuan earthquake by Stochastic Finite-fault Method[J].Science Echoes,2008,4(1):47-58.
    [8]刘文华.大跨复杂结构在多点地震动激励作用下的非线性反应分析[D].北京:北京交通大学,2007.
    [9]李杰,廖松涛.工程场地地震动相干函数的数值模拟[J].地震工程与工程振动,2003,23(2):12-17.