裂面优化法稳定性分析——强度折减VS超重力

doi:10.19952/j.cnki.2096-5052.2021.03.10

Hazard Control in Tunnelling and Underground Engineering

2021, Vol. 3

Issue (3): 94-99 DOI: 10.19952/j.cnki.2096-5052.2021.03.10

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Stability analysis with discontinuity layout optimization: strength reduction vs gravity increasing

WANG Xueya, ZHANG Yiming^*

School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China

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Abstract The stability of geotechnical structures such as slopes and tunnels is often quantified by safety factors. There are three standards for defining factor of safety: the ratio between resistance and driving forces; strength reduction factor and load increasing factor. Aiming at the commonly used strength reduction and load increasing factors, a novel upper bound limit analysis method based on topology optimization theory: discontinuity layout optimization(DLO)was used to study the obtained values considering different conditions. The target functions were proposed considering strength reduction and load increasing. Several numerical examples were tested, indicating the efficiency and reliability of DLO method. Meanwhile, the differences between the factors of safety of strength reduction and load increasing depend on the value itself and friction angle.

Key words： discontinuity layout optimization slope stability shallow tunnel stability limit analysis factor of safety

Received: 10 June 2021 Published: 20 September 2021

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WANG Xueya,ZHANG Yiming. Stability analysis with discontinuity layout optimization: strength reduction vs gravity increasing[J]. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(3): 94-99.

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http://tunnel.sdujournals.com/EN/10.19952/j.cnki.2096-5052.2021.03.10 OR http://tunnel.sdujournals.com/EN/Y2021/V3/I3/94

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