XU Ming, TANG Ya-feng, LIU Xian-shan, et al. Seismic dynamic response of rock slope anchored with adaptive anchor cables[J]. 2018, 39(7): 2379-2386.
DOI:
XU Ming, TANG Ya-feng, LIU Xian-shan, et al. Seismic dynamic response of rock slope anchored with adaptive anchor cables[J]. 2018, 39(7): 2379-2386.DOI: 10.16285/j.rsm.2017.2028.
Seismic dynamic response of rock slope anchored with adaptive anchor cables
the conventional prestressed anchor cables tend to break due to the insufficient deformation ability suddenly. Once the failure of the anchor cable occurs
the safety of the entire anchorage structure is endangered. This study aims to investigate the seismic response of the adaptive anchor cables and the corresponding dynamic characteristics of the anchored slope. The experiments for the rock slope with adaptive anchor cables are conducted based on a new type of anti-seismic anchor cable as a prototype and accordingly loaded by the shaking table test system. In the experiments
four kinds of seismic waves are applied
such as sinusoidal wave
Tianjin wave
EI wave and Taft wave. The real-time strain of the cables and corresponding seismic response of the slope are monitored. The results show that the axial force of anchor cables is closely related to the amplitude
type
seismic excitation frequency of the seismic wave. The acceleration and displacement on slope surface are enlarged with different elevations
and the peak acceleration and displacement decrease compared to the rock slope without anchor cables. With different values of preset slipping constant resistance of adaptive anchor cables
the anchor cables produce three slip modes such as non-slip
instantaneous slip and gradual slip. The corresponding time history curves of cable strain and dynamic safety coefficient of the anchored slope are identically different. Under the condition of the cable slipping
the safety coefficient of the slope decreases partially
whereas the safety capacity of the anchored structure is large enough to suit for the large deformation and transient impact loads on the rock slope. Therefore
the experimental results provide references for the study on the roadway slope supporting and anti-seismic design of the adaptive anchor cables in the strong earthquake area.
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Related Author
SHEN Hui
LIU Ya-qun
LIU Bo
LI Hai-bo
CAO Xiao-yong
LIU Rui-hui
LI Jian-fei
YE Xin-xin
Related Institution
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
University of Chinese Academy of Sciences
School of Highway, Chang’an University
CCCC First Highway Consultants Co., Ltd.
State Key Laboratory of Intelligent Construction and Maintenance for Geotechnical and Tunnel Engineering under Extreme Environments, Southwest Jiaotong University