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| 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 |
1.Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiaotong University, Nanchang 330013, China;
2.Research Center of Coastai and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China |
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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.
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Received: 12 October 2020
Published: 15 February 2022
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