基于土体连续性作用下挡土墙动力响应的显式闭合形式解

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (3) : 262-267.

论文

陈青生1，胡赟1，可文海1，徐长节1,2，彭泽文1

作者信息 +

Explicit closed form solution to dynamic response of retaining wall under continuous action of soil

CHEN Qingsheng1, HU Yun1, KE Wenhai1, XU Changjie1,2, PENG Zewen1

Author information +

文章历史 +

摘要

挡土墙—土动力相互作用是影响挡土墙地震响应的关键因素。基于连续介质模型分析挡土墙—土动力相互作用是当前主要的研究手段。但当前的连续介质模型无法获得挡土墙—土动力相互作用中各物理量的精确表达式，这对揭示挡土墙地震响应机理产生了阻碍。通过引入最小二乘响应面法改进了一种连续介质模型，并与现有方法进行对比，对地震作用下挡土墙动力响应进行了研究，将挡土墙—土动力相互作用细分为：挡土墙的抗弯刚度，土体连续性作用，土弹簧作用，土体惯性力作用，挡土墙惯性力作用。研究结果表明，所提出的模型可以为挡土墙动力响应提供简便而精确的计算，参数分析表明了平动因子和转动因子对入射波的频率非常敏感，同时也受挡土墙的相对柔度系数的很大影响，而挡土墙的内力对相对柔度系数、转度系数以及入射波频率十分敏感，约束条件对挡土墙的动力响应也有较大影响。

Abstract

The dynamic interaction between retaining wall and soil is the key factor affecting the seismic response of retaining wall. It is understood that, the continuum medium model is the main approach to analyze the dynamic interaction between retaining wall and soil. However, significant disadvantage exists in current continuum medium model considering that it cannot obtain the exact expression of parameters governing the dynamic interaction between retaining wall and soil, which could help to understand the seismic response mechanism of retaining wall. To address this issue, in current study, a simple and efficient continuous medium model is developed by introducing the least square response surface method to investigate the dynamic response of retaining wall under earthquake loading conditions. In the proposed method, the dynamic interaction between retaining wall and soil are governed by five components: wall bending, shear resistances of soil, Winkler modulus, inertia of wall and inertia of soil. The results show that the proposed model can provide simple and accurate estimation of the dynamic response of retaining wall. The translation factor and rotation factor are very sensitive to the frequency of the incident wave, and greatly affected by the relative flexibility coefficient of the retaining wall. Also, the internal force of the retaining wall is sensitive to the relative flexibility coefficient, rotation coefficient and incident wave frequency. In addition, the dynamic response of retaining wall is greatly influenced by the constraint conditions.

导出引用

陈青生1，胡赟1，可文海1，徐长节1,2，彭泽文1. 基于土体连续性作用下挡土墙动力响应的显式闭合形式解[J]. 振动与冲击, 2022, 41(3): 262-267

CHEN Qingsheng1, HU Yun1, KE Wenhai1, XU Changjie1,2, PENG Zewen1. Explicit closed form solution to dynamic response of retaining wall under continuous action of soil[J]. Journal of Vibration and Shock, 2022, 41(3): 262-267

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