工程地震中v_(S30)估算模型及其应用研究进展  

v_(S30) Estimation Model and Its Application in Earthquake Engineering

作　　者：江志杰 彭艳菊[2] 吕悦军[2] 黄帅[2] 黄雅虹[2] 修立伟 JIANG Zhijie;PENG Yanju;L Yuejun;HUANG Shuai;HUANG Yahong;XIU Liwei(Earthquake Agency of Gansu Province,Lanzhou 730000,Gansu,China;Institute of Crustal Dynamics,China Earthquake Agency,Beijing 100085,China)

机构地区：[1]甘肃省地震局,甘肃兰州730000 [2]中国地震局地壳应力研究所,北京100085

出　　处：《地震工程学报》2018年第A01期76-82,共7页China Earthquake Engineering Journal

基　　金：中央级公益性科研院所基本科研业务专项(ZD2017-28);北京市自然科学基金项目(8174078);北京市优秀人才项目(2015000057592G270)

摘　　要：在工程地震场地条件评价中,地表以下30m深度范围内的等效剪切波速(vS30)是一个重要的分类参数,但由于客观条件的制约,在很多实例中等效剪切波速度的计算深度未达到30m,因此如何更好地估算vS30就变得尤为重要。详细阐述vS30估算模型的演化发展:首先介绍基于钻孔测井数据的3类模型,即常速度外推模型、速度梯度模型、双深度参数外推模型;然后详述基于地质、地形坡度和地貌等替代指标的vS30估算模型,以及基于HVSR的反应谱比的估算模型。文章分析各模型的特点和适用性,同时在此基础上简述了vS30在现今工程地震领域的应用。In earthquake engineering,the equivalent shear-wave velocity to a depth of 30 m below ground surface(vS30)is a significant parameter in evaluating site conditions.In many cases,however,because of the restrictions of objective conditions,shallow shear-wave velocity profiles do not extend to a depth of 30 m;therefore,it is important to find a better way to estimate vS30.The development of vS30 estimation model is comprehensively introduced in this paper.First,three models(bottom-layer constant velocity model,velocity gradient model,and the extrapolation model with the travel-time averaged shear-wave velocities at two different depths)based on logging data are discussed,and then a vS30 estimation model based on some proxies and an estimation model based on horizontal-to-vertical spectral ratio response are described.Considering the characteristics and applicability of the involved estimation models,the use of vS30 model in modern earthquake engineering is simply described.

关 键 词：剪切波速 场地分类 地震动放大效应 地貌 地形坡度 

分 类 号：P315.9[天文地球—地震学]