近断层地震动竖向分量峰值特性研究  

Study on Peak Value Characteristics of Vertical Component for Near-fault Ground Motions

作　　者：李新乐[1] 窦慧娟[1] 

机构地区：[1]大连民族学院土木建筑工程学院,辽宁大连116605

出　　处：《大连民族学院学报》2010年第1期53-56,共4页Journal of Dalian Nationalities University

基　　金：大连民族学院博士启动基金资助项目(20066104)

摘　　要：对收集到的近断层(断层距不大于15 km)地震动竖向分量进行分类后建立样本库,采用最小二乘回归方法,建立统计分析模型,对竖向地震动的峰值加速度、峰值速度及峰值位移进行回归分析;建立峰值参数与震级和断层距的衰减关系式及其相关系数,与其他研究者及近断层地震实际记录的峰值参数进行对比。结果表明,推荐的峰值衰减关系式与实际结果吻合较好,近断层竖向地震动高频波显著,随断层距衰减较快,为下一步近断层竖向地震动的研究奠定了基础。A sample library was built after the collected vertical components of near - fault （ the distance to the fault is no more than 15 km） ground motions were categorized. The least square regression method was used to create a statistical analysis model for regression analysis of the PGA, PGV and PGD of vertical ground motions. The attenuation relationship between the peak parameters and the motion leveL/the distance to the fault as well as relevant coefficients were established; a comparison was made with the results of other researchers and actual near - fault ground motion records. The result shows that the proposed peak attenuation relationship matches the actual results. High -frequency waves are significant in the vertical component of near - fault ground motions and attenuate fast with the distance to the fault. Our work lays a foundation for further study on the vertical component of near -fault ground motions.

关 键 词：近断层地震动 竖向分量 峰值加速度 峰值速度 峰值位移 

分 类 号：P315.9[天文地球—地震学]