防灾减灾工程学报2017，Vol.37Issue(5)：718-724,7.DOI:10.13409/j.cnki.jdpme.2017.05.004
苏州深厚场地等效剪切波速与计算深度分析
Analysis of Equivalent Shear Wave Velocity and Its Calculation Depth of Deep Sediment Layers in Suzhou Region
摘要
Abstract
Shear wave velocity is an important parameter for evaluating the dynamic behavior of soil.In seismic design codes,the equivalent shear wave velocity is used as the key indicator to classify sites.However,the different calculation depths were chosen in different seismic codes.The correlation of equivalent shear wave velocities vs,20 and vs,30 corresponding to the depths of 20 m and 30m are statistically analyzed on the basis of the measured data of shear-wave velocity from 446 boreholes in Suzhou study region.According to the site category standards in the seismic codes of GB50011-2010,NEHRP and Eurocode 8,the spatial distribution characteristics of site categories in Suzhou region are compared.The results exhibit a significant linear correlation between vs,20 and vs,30,and the corresponding determination coefficient R2 is 0.888.There are significant difference in spatial distributions of site categories presented by the codes of GB50011-2010,NEHRP and Eurocode 8.Furthermore,the equivalent shear wave velocities corresponding to the different codes vary greatly.According to the seismic code of GB50011-2010,the Ⅱ category site is distributed among the local part in the western area of Suzhou region,the Ⅲ category site is spread over the entire Suzhou region,and the Ⅳ category site is scattered in Suzhou region.As a comparison,the DUs category site given by NEHRP code and the CEU category given by Eurocode 8 are distributed throughout the whole area.While the EUs category site for NEHRP code and DEU category site for Eurocode 8 are distributed mainly over a long and narrow zone with an angle of 23° to the east-west direction.关键词
场地分类/空间分布特征/苏州研究区/深厚场地/等效剪切波速/计算深度Key words
site category/spatial distribution characteristics/Suzhou study region/deep sediment layers/equivalent shear wave velocity/calculation depth分类
建筑与水利引用本文复制引用
张驰,许汉刚,陈国兴,朱姣,强梦芸..苏州深厚场地等效剪切波速与计算深度分析[J].防灾减灾工程学报,2017,37(5):718-724,7.基金项目
国家自然科学基金项目(51378258)资助 （51378258）
