Dynamic stability evaluation of rock slope blocks considering vibration degradation effect of structural plane

被引：0
|
作者：
Gao B. [1 ]
Liu S. [1 ]
Ren J. [1 ]
Cai Z. [2 ]
Zhang J. [1 ]
Zhang L. [3 ]
机构：
[1] Xi'an University of Science and Technology, Xi'an
[2] Northwest Hydropower Engineering Co., Ltd., Powerchina, Xi'an
[3] Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2024年 / 57卷 / 01期
关键词：
coordinate projection; dynamic stability evaluation; instability criterion; rock slope blocks; vibration degradation of structural plane;
D O I：
10.15951/j.tmgexb.22090909
中图分类号：
学科分类号：
摘要：
To evaluate dynamic stability of rock slope block under seismic action, the seismic degradation effect of the structural plane is studied based on the numerical cyclic shear test of the structural plane, in order to establish the mathematical model of seismic degradation of the structural plane. Based on the principle of coordinate projection, the calculation method of dynamic stability coefficient of rock block considering the degradation effect of structural plane strength vibration is proposed. By adopting the numerical analysis method, the influences of seismic wave fluctuation characteristics on the stability of rock slope blocks are studied, and furthermore the mutation criterion of displacement dynamic response amplification coefficient is proposed based on the mutation theory. Finally, an evaluation system for the dynamic stability of rock blocks is established by combining the time-history curve of the block dynamic stability coefficient with the displacement dynamic response amplification coefficient, so that the block dynamic stability evaluation method under seismic action can be extended. The research results show that the seismic degradation effect of the structural plane is affected by the cyclic shear amplitude, shear cycles, and relative motion velocity, and it is also closely related to the undulation angle. The accuracy of the calculation method of the block dynamic stability coefficient considering the seismic degradation of the structural plane is verified by the study case. The proposed evaluation system is safe and reliable , which shall be beneficial to the development of the block dynamic stability theory as well as the prevention and control of slope geological disasters. © 2024 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：97 / 110
页数：13
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