Shaking table tests of cantilevered reinforced soil retaining walls

被引：0
|
作者：
Wei M. [1 ,2 ]
Luo Q. [1 ,2 ]
Jiang L. [1 ,2 ]
Wang T. [1 ,2 ]
Zuo D. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2021年 / 40卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Acceleration; Cantilever retaining wall; Dynamic earth pressure; Reinforced backfill; Shaking table test; Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2020.0514
中图分类号：
学科分类号：
摘要：
The application of reinforcement elements in compacted backfill can significantly improve the seismic resistance of a retaining structure. In this paper, shaking table tests were performed on cantilevered reinforced earth retaining walls under sine wave loading at a frequency of 5 Hz, and the response acceleration of the model wall and the backfill, the dynamic earth pressure and displacement of the wall, and the dynamic tensile force of the reinforcement were monitored under 0.11 g(minor), 0.24 g(moderate)and 0.39 g(major) accelerations. The variations of dynamic characteristics of the model structure, the interaction between the wall and the backfill, and the stress level of the reinforcement with different imposed accelerations were illuminated. The results show that the propagation of the acceleration in the backfill shows hysteresis and nonlinear amplification effects and the acceleration tends to increase with rising the vibration amplitude. The most unfavorable condition(critical state) of the system stability means that the wall moves away from the backfill under the maximum inertia force. The synchronization between the peak dynamic earth pressure on the wall back and the peak inertia force of the wall becomes more pronounced with larger acceleration amplitude. The earth pressure acting on the wall is more significant with an acceleration of 0.39 g. The dynamic earth pressure acting on the upper portion of the wall is generally higher than that on the lower portion, and the resultant force acts at approximately 2/3 of the height of the wall, much larger than that obtained from the current code. The dynamic tensile force of the reinforcement increasing with the acceleration amplitude presents an inhomogeneous spatial distribution, and the connecting line of the points of the maximal tensile force reflecting the potential failure surface shows piecewise linear through the end of the slab base. © 2021, Science Press. All right reserved.
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页码：607 / 618
页数：11
相关论文
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