| 宁波深厚软土动力特性研究及其地震响应分析 |
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| 引用本文： | 陈斌,张栋梁,张春进,杨亚勤,王国波.宁波深厚软土动力特性研究及其地震响应分析[J].西北地震学报,2016,38(3):338-343. |
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| 作者姓名： | 陈斌 张栋梁 张春进 杨亚勤 王国波 |
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| 作者单位： | 宁波市轨道交通集团有限公司, 浙江 宁波 315012,上海市城市建设设计研究总院, 上海 200125,宁波市轨道交通集团有限公司, 浙江 宁波 315012,宁波市轨道交通集团有限公司, 浙江 宁波 315012,武汉理工大学道路桥梁与结构工程湖北省重点实验室, 湖北 武汉 430070 |
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| 基金项目： | 武汉市城乡建设委员会科研项目(201417) |
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| 摘 要： | 利用Davidenkov模型对宁波深厚软土地区土动力试验数据进行拟合分析,确定相关拟合参数,结果表明该模型能较好地描述软土的动剪切模量和动阻尼比随动剪应变的变化规律。然后,基于等价线性化方法以及ANSYS软件的APDL语言进行简单的二次开发,编写Davidenkov模型计算程序,并利用经典的SHAKE软件进行验证,结果表明该程序计算结果很好,能解决目前商业软件中缺乏合适的土体非线性动力本构模型的不足。最后,利用开发的模型计算分析宁波深厚软土的地震响应规律,并与规范推荐的简化计算公式进行比较分析,结果表明规范推荐的公式得到的土体响应偏大,对于地下结构的抗震设计偏于保守。研究成果对确定深厚软土地区土体动力特性及其地震响应研究提供了合理的计算方法。
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| 关 键 词： | 软土 动力特性 地震响应 Davidenkov模型 SHAKE 等价非线性 |
| 收稿时间： | 2014/8/20 0:00:00 |
Analysis of Dynamic Characteristics and Seismic Response of Deep Soft Soil in Ningbo Area |
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| CHEN Bin,ZHANG Dong-liang,ZHANG Chun-jin,YANG Ya-qin and WANG Guo-bo.Analysis of Dynamic Characteristics and Seismic Response of Deep Soft Soil in Ningbo Area[J].Northwestern Seismological Journal,2016,38(3):338-343. |
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| Authors: | CHEN Bin ZHANG Dong-liang ZHANG Chun-jin YANG Ya-qin and WANG Guo-bo |
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| Institution: | Ningbo Rail Transit Group Co. Ltd., Ningbo 315012, Zhejiang, China,Shanghai Urban Construction Design & Research Institute, Shanghai 200125, China,Ningbo Rail Transit Group Co. Ltd., Ningbo 315012, Zhejiang, China,Ningbo Rail Transit Group Co. Ltd., Ningbo 315012, Zhejiang, China and Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China |
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| Abstract: | In this study, we used the Davidenkov model to conduct a fitting analysis on dynamic test data of deep soft soil in the city of Ningbo and then determined the relevant fitting parameters. The fitting results demonstrate that the Davidenkov model can describe the dynamic characteristics of the Ningbo deep soft soil well. We wrote the computation program for Davidenkov model in APDL language using ANSYS software based on the equivalent nonlinear method and verified its correction by the classic earthquake response program SHAKE. The results show that the program is effective and can address the lack of nonlinear constitutive soil models in existing commercial software. We used the above program to compare relevant codes and analyzed the seismic responses of the Ningbo deep soft soil. The analysis results indicate that the soil displacement obtained by the formula recommended by the code is actually greater than expected, which means that the underground structure that was designed according to code is conservative. The research results from this study provide a reasonable method for calculating soil dynamic characteristics and conducting seismic response analysis of deep soft-soil areas. |
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| Keywords: | soft soil dynamic characteristics seismic response Davidenkov model SHAKE equivalent nonlinear |
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