地震工程学报2025，Vol.47Issue(5)：1055-1064,1101,11.DOI:10.20000/j.1000-0844.20240507001
黑龙江地区土层剪切波速与埋深关系及其变异性对土层地震反应的影响
Relationship between shear wave velocity and burial depth in the Heilongjiang area and the impact of its variability on the seismic response of soil layers
摘要
Abstract
Shear wave velocity(vS),an inherent property of geotechnical materials with substan-tial regional characteristics,critically influences the seismic response of soil layers.Utilizing vS data from seismic safety evaluations at major engineering sites in the Heilongjiang area,statistical regressions were performed using linear,binomial,power function,and power-function-with-constant models across various soil types,including silty clay,clay,sand,gravelly soil,and weathered rock.The resulting fitting parameters and goodness-of-fit indicators for different mod-els were obtained,providing insights into the relationship between vS and burial depth for com-mon soil types in the Heilongjiang area.Systematic errors in vS measurements can impact seismic response calculations.Focusing on the Heilongjiang area,this study investigated how vS variabili-ty affects seismic response parameters,specifically the site amplification factor(FPGA),spectral plateau value(β),and characteristic period(Tg)under varying seismic intensities.Key results indicate the following:(1)vS increases nonlinearly with burial depth;(2)negative variations in vS generally reduce FPGA and βwhile increasing Tg,whereas positive variations produce the oppo-site effects;(3)negative variations in vS have a substantially greater influence on all three param-eters than positive variations;(4)sensitivity to vS variability follows the order:Tg＞FPGA＞β;(5)stronger input motions amplify errors caused by vS variability;and(6)for soft sites,vS measurement accuracy cannot be ignored and overestimation of test results may severely affect long-period structures.关键词
剪切波速/埋深/变异性/土层地震反应/黑龙江地区Key words
shear wave velocity/burial depth/variability/seismic response of soil layers/Heilongjiang area分类
建筑与水利引用本文复制引用
齐文浩,李林芳,陈方晓,张苋凯..黑龙江地区土层剪切波速与埋深关系及其变异性对土层地震反应的影响[J].地震工程学报,2025,47(5):1055-1064,1101,11.基金项目
中国地震局工程力学研究所基本科研业务费专项资助项目(2019B10) （2019B10）
黑龙江省科学基金项目(LH2021E121) （LH2021E121）
