Parametric Analyses of Effects of Soft-soil Layer on Seismic Response of Interaction System of Bridge Structure

崔春义; 孟坤; 陈守龙; 程学磊; 杨刚

doi:10.13409/j.cnki.jdpme.2017.06.014

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Parametric Analyses of Effects of Soft-soil Layer on Seismic Response of Interaction System of Bridge Structure

更新时间：2025-12-11

- Parametric Analyses of Effects of Soft-soil Layer on Seismic Response of Interaction System of Bridge Structure
- Vol. 37, Issue 6, Pages: 951-957(2017)
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- DOI：10.13409/j.cnki.jdpme.2017.06.014
  CLC： U435;U441
- Published：2017
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[1]崔春义,孟坤,陈守龙,程学磊,杨刚.场地软土夹层对桥梁结构相互作用体系动力响应影响参数化分析[J].防灾减灾工程学报,2017,37(06):951-957.

崔春义, 孟坤, 陈守龙, et al. Parametric Analyses of Effects of Soft-soil Layer on Seismic Response of Interaction System of Bridge Structure[J]. 2017, 37(6): 951-957.
[1]崔春义,孟坤,陈守龙,程学磊,杨刚.场地软土夹层对桥梁结构相互作用体系动力响应影响参数化分析[J].防灾减灾工程学报,2017,37(06):951-957. DOI： 10.13409/j.cnki.jdpme.2017.06.014.

崔春义, 孟坤, 陈守龙, et al. Parametric Analyses of Effects of Soft-soil Layer on Seismic Response of Interaction System of Bridge Structure[J]. 2017, 37(6): 951-957. DOI： 10.13409/j.cnki.jdpme.2017.06.014.

摘要

为探讨场地软土夹层对桥梁结构动力响应特性的影响效应

通过建立桥梁结构一地基基础相互作用体系动力参数化数值分析模型

采用Newmark逐步积分方法求解材料非线性的动力平衡方程

针对水平地震力作用下桥梁结构一地基完全相互作用体系进行动力响应时程参数化分析

研究了软土夹层深度范围和厚度变化对场地滤波作用、桥台、中桩和边桩受力变形的影响规律

计算结果表明:场地软土层深度减小或厚度变薄

加速度反应谱曲线双峰特征、滤波放大效应和边桩、中桩弯矩极值沿深度S型变化特征越明显

可为相关工程设计与实践提供指导和参考作用。

Abstract

In order to discuss the effect of soft-soil layer on seismic response of interaction system of bridge structure

numerical parametric analyses are conducted on the basis of the FE model of interaction system including bridge structure-pile-soil foundation under horizontal excitation by using Newmark’s step-by-step integration method to consider material nonlinearity. The numerical results show that the decrease of thickness or depth of soft layer makes the bimodal feature of acceleration spectrum curve

the filtering and amplifying effect of soft interlayer and the S pattern of variation of maximum bending moment in both border and middle piles become more obvious.It can be concluded that the existence of soft interlayer in subgrade has significant effect on seismic response of interaction system of bridge structure and it is important for engineering practice and design.

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references

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