LI Shuijiang,TONG Yanguang,LIU Feiyu,et al.Seismic Response of Reinforced Soil Slope Considering Interface Stiffness Softening under Different Water Content[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):862-870.
LI Shuijiang,TONG Yanguang,LIU Feiyu,et al.Seismic Response of Reinforced Soil Slope Considering Interface Stiffness Softening under Different Water Content[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(04):862-870. DOI: 10.13409/j.cnki.jdpme.20221006002.
Seismic Response of Reinforced Soil Slope Considering Interface Stiffness Softening under Different Water Content
Reinforced soil structure has better overall deformation coordination ability as well as seismic performance, which is widely used in slope engineering. Based on the laboratory direct shear test data of residual soil and reinforcement-soil interface, the interface shear strength parameters of soil and reinforced soil under different water contents were considered in the finite difference software, and the dynamic process of interface shear stiffness of reinforced soil was realized in numerical calculation by using FISH programming language. The displacement, stress and acceleration responses of a reinforced soil slope under different water contents, reinforcement lengths, reinforcement spacings and seismic peak acceleration conditions were analyzed. The results show that compared to the case without considering the stiffness softening of the reinforcement-soil interface, the effect of water content on the horizontal displacement and acceleration amplification coefficient of the reinforced soil slope is greater than that considering the shear stiffness softening. The lateral displacement of slope surface, the settlement at slope top and the tensile stress of reinforcement are positively correlated with the water content of backfill soil, while the acceleration amplification coefficient is negatively correlated with the water content of backfill soil. Increasing the length of reinforcement in a certain range can effectively reduce the horizontal displacement of the slope. The bar spacing has a greater influence on lateral displacement of the reinforced slope with lower water content. The greater the peak seismic acceleration, the greater the effect of water content on the horizontal displacement of the slope.
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