黄土与地铁车站动力相互作用模型的水平位移及沉降分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (17) : 111-119.

论文

权登州 1，王毅红 1，叶丹 1，井彦林 1，陈苏 2

作者信息 +

Horizontal displacement and settlement analysis on soil-structure interaction model of subway station in loess ground

QUAN Deng-zhou1, WANG Yi-hong1, YE Dan1, JING Yan-lin1, CHEN Su2

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文章历史 +

摘要

在黄土场地条件下进行土与地铁地下结构动力相互作用振动台试验。基于实测数据对黄土与地铁车站接触动土压力、模型地基竖向沉降及水平位移进行分析，对试验中模型地基地震破坏特点进行描述。结果表明：结构侧面顶部动土压力大于中部和下部，随输入峰值加速度的增大结构侧面土压力均增大；地震动较大时，地基层间剪切位移呈现顶部最大，底部次之，中部最小；地表沉降随输入峰值加速度的增加而增大，西安人工波作用下地表沉降大于松潘波和Taft波作用下沉降；结构上方地表沉降始终小于周围土层，表明结构发生相对上升运动；分析发现，结构顶、底动土压力差提供结构上升运动的内在动力。回归分析表明，地基水平相对位移与土层深度可用三次多项式拟合，两者之间具有较好的相关性。

Abstract

Based on the soil-structure interaction, a series of shaking table tests were performed for subway station in loess ground. The dynamic soil pressure between loess and subway station, the horizontal displacement and settlement of model soil were analysed, and the seismic damages of loess ground were summarized by observation after the tests. The results show that the dynamic soil pressure of side wall is increased with the increase of PGA, and higher at the top than at the middle and bottom. Under higher PGA ground motion, the shear displacement between soil layers is larger at the top than at the bottom, while the shear displacement at the middle of the ground is smallest. The settlement of ground surface is increased with the increase of PGA, and the peak value of settlement is larger under Xi’an artificial wave than under Songpan and Taft wave. The settlement above subway station is always smaller than surrounding soils, the subway station uplifts obviously, and the comparative analysis reveals that the difference of dynamic soil pressure between bottom and top of subway station provide uplifting. Meanwhile, using nonlinear regression analysis method, the relationship between the relative horizontal displacement of ground and soil depth can be well fitted by cubic polynomial.

导出引用

权登州 1，王毅红 1，叶丹 1，井彦林 1，陈苏 2. 黄土与地铁车站动力相互作用模型的水平位移及沉降分析[J]. 振动与冲击, 2017, 36(17): 111-119

QUAN Deng-zhou1, WANG Yi-hong1, YE Dan1, JING Yan-lin1, CHEN Su2. Horizontal displacement and settlement analysis on soil-structure interaction model of subway station in loess ground[J]. Journal of Vibration and Shock, 2017, 36(17): 111-119

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