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Reliability Analysis of Seismic Slope Incorporating Interactions among Multiple Sliding Blocks Using Imbalance Thrust Force Method in Primary Sliding Direction

Author

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  • Chunli Li

    (School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)

  • Guangming Yu

    (School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)

  • Liang Li

    (School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)

  • Hongbiao Yu

    (Tunnel Engineering Co., Ltd., China Communications Construction, Beijing 100024, China)

  • Yanxiang Fan

    (The Fifth Engineering Co., Ltd., China Railway 25th Bureau Group, Qingdao 266101, China)

  • Jun Lei

    (Engineering Bureau Co., Ltd., China State Construction, Changsha 410007, China)

  • Zhen Xu

    (Qingdao Metro Line 1 Co., Ltd., Qingdao 266045, China)

Abstract

This paper proposes a methodology for reliability analysis of seismic slope stability that incorporates interactions among multiple sliding blocks. The primary sliding direction is first determined using the vector sum method and then the imbalance thrust force along the primary sliding direction is calculated using the slice-wise strategy and, finally, the double integration strategy is adopted to calculate the accumulated sliding displacement within the earthquake duration. The interactions among multiple sliding blocks are incorporated by checking the potential of occurrence for each of the multiple sliding modes. The proposed method is applied to a soil slope with two sliding surfaces. The comparative studies demonstrate that the mean and standard deviation of the sliding displacement considering the interaction of multiple sliding blocks are approximately three times larger than that of a single sliding mode, and the COV (mean value divided by standard deviation) of the two are slightly different. For the single sliding mode, the mean and standard deviation of the sliding displacement calculated using the proposed method are about 1/2 of the traditional Newmark sliding block model, and the failure probability obtained by the proposed method is lower than that from the traditional Newmark sliding block model owing to the difference in the sliding direction. The Peak Ground Acceleration (PGA) exhibits a significant effect on the statistics of 10,000 sliding displacements. The interactions among multiple sliding blocks and the PGA are required to be properly considered in seismic slope reliability analysis.

Suggested Citation

  • Chunli Li & Guangming Yu & Liang Li & Hongbiao Yu & Yanxiang Fan & Jun Lei & Zhen Xu, 2023. "Reliability Analysis of Seismic Slope Incorporating Interactions among Multiple Sliding Blocks Using Imbalance Thrust Force Method in Primary Sliding Direction," Sustainability, MDPI, vol. 15(16), pages 1-16, August.
  • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12350-:d:1216855
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    References listed on IDEAS

    as
    1. Kaiqi Meng & Guangming Yu & Liang Li & Zhen Xu & Jun Lei & Yanxiang Fan & Hongbiao Yu & Liang Xu, 2023. "Deformation-Based Basal Heave Reliability Analysis and Selection on Monitoring Points for General Braced Excavations," Sustainability, MDPI, vol. 15(11), pages 1-19, June.
    2. Farshad BahooToroody & Saeed Khalaj & Leonardo Leoni & Filippo De Carlo & Gianpaolo Di Bona & Antonio Forcina, 2021. "Reliability Estimation of Reinforced Slopes to Prioritize Maintenance Actions," IJERPH, MDPI, vol. 18(2), pages 1-12, January.
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