Inverse analysis on dynamic shear modulus of earth-rockfill dam foundation based on the influence of dynamic earth pressure

HUANG Xiao-shi; HUANG Jun-qing; YAN Ye-gan; WANG Yu-bing

doi:10.16285/j.rsm.2023.0729

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Inverse analysis on dynamic shear modulus of earth-rockfill dam foundation based on the influence of dynamic earth pressure

更新时间：2026-06-25

- Inverse analysis on dynamic shear modulus of earth-rockfill dam foundation based on the influence of dynamic earth pressure
- Vol. 44, Issue 10, Pages: 2889-2898(2023)
- 作者机构：
  
  1. 浙江大学超重力研究中心,浙江,杭州,310058
  2. 浙江大学软弱土与环境土工教育部重点实验室,浙江,杭州,310058
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.0729
  CLC： TV223
- Online First：16 October 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
HUANG Xiao-shi, HUANG Jun-qing, YAN Ye-gan, et al. Inverse analysis on dynamic shear modulus of earth-rockfill dam foundation based on the influence of dynamic earth pressure[J]. 2023, 44(10): 2889-2898.
DOI：

HUANG Xiao-shi, HUANG Jun-qing, YAN Ye-gan, et al. Inverse analysis on dynamic shear modulus of earth-rockfill dam foundation based on the influence of dynamic earth pressure[J]. 2023, 44(10): 2889-2898. DOI： 10.16285/j.rsm.2023.0729.

摘要

对于土石坝的坝基中土体应力−应变关系的求解，由于非自由地表以及土体所受水平正应力变化的影响，理想一维剪切梁模型方法并不适用。利用下覆饱和砂土地基的土石坝离心振动台试验，分析了不同输入地震峰值下非坝体覆盖区地基、坝中、坝趾处土体加速度的响应规律，得到了坝基中上部土层动土压力在水平向的变化特征，提出了考虑水平向动土压力影响的坝基土体剪应力剪应变反演计算方法，并与利用理想一维剪切梁模型所绘制的应力−应变滞回圈对比，分析了动土压力对坝基土动剪切模量的影响。结果表明：由坝基底部至坝顶，加速度的放大效应基本呈线性增大；土压力在水平向的变化情况在剪应力−剪应变反演计算中不能忽略；考虑水平向动土压力的影响后，土体剪切模量的计算值减小。随着深度增加，动土压力对坝基中部土体剪切模量的影响比上部土体更大，且计算相对误差随着深度和输入地震波峰值加速度的增加而变大。

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