Characteristics of dynamic response of gravel soil slope with different angles of inclination
Liang Shuangqing1, 4, Su Lijun1, 2, 3, Wang Yang1, 4
1. Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
2. State Key Laboratory of Architecture Science and Technology in West China, Xi’an University of Architecture and Technology, Xi’an 710055, China;
3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;
4.Graduated University of Chinese Academy of Sciences，Beijing 100049，China
Abstract：A small-scale shaking table test with the geometric scale of 1:100 with angle of 35°，45°and 55°was designed. A series of tests were performed with X and Z direction sine wave of different frequency. The law of dynamic response and characteristic of deformation and failure of gravel soil slope were studied. Results showed that the elevation has amplification effect on seismic waves. The amplification of horizontal acceleration is stronger than vertical acceleration. As the increases of inclination angle, the peak of horizontal or vertical acceleration increases firstly and decreases secondly. The most obvious amplification occurs when angle is 45°. With the increase of elevation, the peak of horizontal acceleration increases slowly in lower part of slope, and increases quickly in upper part. The peak of vertical acceleration increases in total elevation without non-obvious separation elevation. As the increases of frequency, the peak of horizontal acceleration of the same elevation increases, and the peak of vertical acceleration increases firstly and decreases secondly. The most obvious amplification occurs when frequency is 25 Hz. The PIV analysis showed that the horizontal movement of slope shoulder is most obvious under 45°and 25Hz. Therefore, gravel soil slope is prone to emerge shoulder failure under earthquake action.
收稿日期: 2015-07-14
出版日期: 2016-10-25
引用本文:
梁双庆1,4，苏立君1,2,3，王洋1,4. 不同坡面角度碎石土斜坡动力响应特征研究[J]. 振动与冲击, 2016, 35(21): 153-158.
Liang Shuangqing1, 4, Su Lijun1, 2, 3, Wang Yang1, 4. Characteristics of dynamic response of gravel soil slope with different angles of inclination. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(21): 153-158.
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