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| A STRENGTH REDUCTION METHOD CONSIDERING TENSILE FAILURE |
| YUAN Wei，LI Xiaochun，BAI Bing，SHI Lu |
(State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，
Chinese Academy of Sciences，Wuhan，Hubei 430071，China) |
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Abstract Strength reduction method(SRM) is widely used for calculating the safety factor of the slope. In realistic slope engineering，shear failure is not the only mode in rock masses，the tensile failure may also occur in certain areas，which means that the tensile failure should also be taken into consideration in SRM. In this paper，a strength reduction method considering tensile failure is proposed，indicating that the tensile strength，internal friction angle and cohesion should satisfy an inequality during strength reduction process. Based on this inequality，the drawback of the current SRM considering the tensile failure is pointed out. At last，the validity of the proposed method is verified through a case study.
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Received: 13 August 2013
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| [1] ZIENKIEWIEZ O C，HUMPHESON C，LEWIS R W. Associated and non-associated visco-plasticity and plasticity in soil mechanics[J]. Geotechnique，1975，25(4)：671–689.
[2] GRIFFITHS D V，LANE P A. Slope stability analysis by finite elements[J]. Geotechnique，1999，49(3)：387–403.
[3] MATSUI T，SAN K C. Finite element slope stability analysis by shear strength reduction technique[J]. Soil and Foundations，1992，32(1)：59–70.
[4] WANG Dasheng，ZHANG Liaojun，XU Jianjun，et al. Seismic stability safety evaluation of gravity dam with shear strength reduction method[J]. Water Science and Engineering，2009，2(2)：52–60.
[5] CHENG Y M，LANSIVAARA T，WEI W B. Two-dimensional slope stability analysis by limit equilibrium and strength reduction methods[J]. Computers and Geotechnics，2007，34：137–150.
[6] LIN Hang，CAO Ping，GONG Fengqiang，et al. Directly searching method for slip plane and its influential factors[J]. Journal of Central South University of Technology，2009，(16)：131–135.
[7] 戴自航，刘志伟，刘成禹，等. 考虑张拉与剪切破坏的土坡稳定数值分析[J]. 岩石力学与工程学报，2008，27(2)：375–382.(DAI Zihang，LIU Zhiwei，LIU Chengyu，et al. Numerical analysis of soil slope stability considering tension and shear failures[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：375–382. (in Chinese))
[8] ALEJANO L R，ALONSL E. Application of the shear and tensile strength reduction technique to obtain factors of safety of toppling and footwall rock slopes[J]. Impact of Human Activity on the Geological Environment，2005：7–13.
[9] 赖 杰，方玉树. 专虑抗拉强度的含外倾结构面岩质边坡稳定性分析[J]. 后勤工程学院学报，2011，27(6)：7–12.(LAI Jie，FANG Yushu. Stability analysis of rock slope with extroversion joint considering tensile strength[J]. Journal of Logistical Engineering University，2011，27(6)：7–12.(in Chinese))
[10] KOGURE T，AOKI H，MAEKADL A，et al. Effect of the development of notches and tension crack on instability of limestone coastal cliffs in the Ryukyus，Janpan[J]. Geomorphology，2006，80：236–244.
[11] BROWN I，HITTINGER M，GOODMAN R. Finite element study of the Nevis Bluff rock slope failure[J]. Rock Mechanics，1980，12：231–245.
[12] KROEGER E B. Analysis of plane failures in compound slopes[J]. International Journal of Surface Mining，Reclamation and Environment，2000，14：215–222.
[13] PAUL B. Modification of the Coulomb-Mohr theory of fracture[J]. Journal of Applied Mechanics，1961，28：259–268. |
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2014, Vol. 33 
