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Volume 45 Issue S2
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DAI Xuan, MA Yunxiang, WEI Shaowei, WEI Peiyong, HUO Haifeng, CAI Degou, LI Zhao. Seismic performance analysis of frame beams-reinforced slope under different earthquake intensities[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 147-152. DOI: 10.11779/CJGE2023S20019
Citation: DAI Xuan, MA Yunxiang, WEI Shaowei, WEI Peiyong, HUO Haifeng, CAI Degou, LI Zhao. Seismic performance analysis of frame beams-reinforced slope under different earthquake intensities[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 147-152. DOI: 10.11779/CJGE2023S20019
shu

Seismic performance analysis of frame beams-reinforced slope under different earthquake intensities

  • 1.

    College of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China

  • 2.

    Railway Engineering Research Institute, China Academy of Railway Sciences Group Co., Ltd., Beijing 100081, China

  • 3.

    Beijing Tieke Special Engineering Technological Development Co., Ltd., Beijing 100081, China

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  • Received Date: November 29, 2023
  • Available Online: April 19, 2024
    Graphical Abstract
    • Abstract
  • As a new slope reinforcement method, the prefabricated prestressed anchor cable frame has been used in engineering. However, its seismic performance still needs to be studied deeply. Based on a practical project, a nonlinear dynamic time history numerical model is established for the reinforcement of slope by the combination of "cross beam" and "straight beam" using El Centro waves as the ground motion input. The influence rules of different earthquake intensities are analyzed through amplitude modulation. The results show that the horizontal displacement difference of the slope after the reinforcement of the frame beams decreases significantly. The influences of the peak acceleration on the horizontal displacement of the slope are mainly reflected at the residual deformation stage. The permanent displacement of the slope after earthquake increases with the increasing peak acceleration, and the growth rate is gradually accelerated. Under different peak accelerations, the slope acceleration response has a certain lag effect. When the peak acceleration is large, the slope acceleration response is in a state of drastic fluctuation for a long time. After reinforcement, the acceleration amplification coefficient can reach 8.0, and gradually decreases with the increase of earthquake intensity. The maximum stress at the bottom of the prefabricated cross beams is obviously smaller than that of the prefabricated straight ones. When the peak acceleration is 0.4g, the bottom of the frame beams has the risk of cracking.
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    • References (16)
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