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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

47

期数:

2024年02期

页码:

273-279

栏目:

出版日期:

2024-06-01

文章信息/Info

Title:

Analysis of Non-linear Dynamic Parameters of the Cohesive Soil in the Xiong’an New District

作者:

刘红帅¹; 2; 3; 陈佩云¹; 2; 孙强强¹; 2; 宋东松³

(1.河北大学 岩土工程研究所,河北 保定 071002; 2.河北大学 建筑工程学院,河北 保定 071002; 3.河北极致地震预防服务有限公司,河北 保定 071028)

Author(s):

LIU Hongshuai¹; 2; 3; CHEN Peiyun¹; 2; SUN Qiangqiang¹; 2; SONG Dongsong³

(1.Institute of Geotechnical Engineering,Hebei University,Baoding 071002,Hebei,China)(2.College of Civil Engineering and Architecture,Hebei University,Baoding 071002,Hebei,China)(3.Hebei Excellent Earthquake Prevention Service Co.,Ltd.,Baoding 071028,Hebei,China)

关键词:

雄安新区;  黏性土;  动剪切模量比;  阻尼比

Keywords:

continuous beam bridge;  seismic isolation;  Lead Rubber Bearings;  the Shape Memory Alloy;  seismic fragility

分类号:

P315.9

DOI:

10.20015/j.cnki.ISSN1000-0666.2024.0012

摘要:

以雄安新区起步区区域性地震安全性评价项目的黏性土动三轴试验结果为基础,整理分析199组黏性土的动剪切模量和阻尼比数据,以埋深10 m为统计区间,统计给出雄安新区黏性土不同埋深区间的动剪切模量比和阻尼比随剪应变变化的平均值和变异系数,并与已有的同类成果进行对比分析。结果表明:雄安新区黏性土非线性动力学参数符合土动力学的基本认识; 雄安新区黏性土体的动剪切模量比略高于天津地区,随埋深的增加逐渐趋近于全国的上限值,而阻尼比在浅表时明显低于天津和全国的推荐平均值,随埋深的增加逐渐趋向于全国的下限值。

Abstract:

Based on the dynamic triaxial test results of the cohesive soil from the Regional Earthquake Safety Evaluation Project in the starting area of the Xiong’an New District,the dynamic shear modulus and damping ratio data of 199 groups of cohesive soils were sorted and analyzed.The burial depth interval was 10 m,and the average values of dynamic shear modulus ratio and damping ratio with shear strain in different burial depth intervals of the cohesive soil in Xiong’an New District are given,and the variability and dispersion of nonlinear dynamic parameters with burial depth are given too.The results show that compared with the results in other regions,the nonlinear dynamic parameters of the cohesive soil in the Xiong’an New District are in line with the basic understanding of soil dynamics; the dynamic shear modulus of the cohesive soil in the Xiong’an New District is slightly higher than that in the Tianjin area,and tends to the upper limit value of the whole country with the increase of burial depth,while the damping ratio is obviously lower than the recommended average value in Tianjin and the average value of the whole country at the shallow surface and,with the increase of burial depth,approaches to the upper-limit value of the whole country.The obtained statistical results basically reflect the nonlinear dynamic characteristics of the clayey soil in the Xiong’an New District,and can provide scientific basis for the determination of the design ground motion parameters in the Xiong’an New District.

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备注/Memo

备注/Memo:

收稿日期:2022-09-11.
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(2019EEEVL0202); 河北省自然科学基金项目(E2020201017); 河北省高等学校科学技术研究项目(ZD2020157).
第一作者简介:刘红帅(1975-),研究员,博士,主要从事岩土地震工程研究.E-mail:liuhs1975@hbu.edu.cn.

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更新日期/Last Update: 2024-03-20