边坡强度参数非等比例相关联折减法研究

doi:10.13722/j.cnki.jrme.2014.1216

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摘要为了克服现有双折减系数法确定双安全系数的不足，在强度参数分布服从线性衰减假定的基础上，推导黏聚力折减系数与内摩擦角折减系数之间的非等比例相关关系；将此关系引入传统的有限元强度折减法中，提出有限元强度参数非等比例相关联折减法；借助ABAQUS有限元数值计算软件实现了基于场变量的有限元强度参数非等比例相关联折减法，从而提高有限元法求解边坡双安全系数的效率；为了在双安全系数的基础上表征边坡的整体安全储备，提出以抗剪强度参数对抗滑力的贡献为权重的综合安全系数；最后结合算例，通过对比分析3种不同折减方式下边坡的滑面位置及综合安全系数，验证了该方法的合理性及可靠性。

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	薛海斌1
	党发宁1
	尹小涛2
	杨超1
	严飞3

关键词 ：边坡工程, 软化特性, 双折减系数, 强度折减

Abstract：In order to overcome the insufficiency of the existing double reduction factors method to determine the double safety factors and based on the assumption that the distribution of the strength parameters obeys linear attenuation，the non-proportional relationship between the reduction factor of cohesion and the reduction factor of internal friction angle is deduced. Then we introduce this relationship into conventional strength reduction FEM，and propose strength parameters non-proportional associated reduction FEM. Then strength parameters non-proportional associated reduction FEM based on field variable is realized by using finite element software ABAQUS，thus the efficiency of calculation is improved in the determination of double safety factors. In order to evaluate the slope stability，comprehensive safety factor is proposed. The safety factor is based on shear strength parameters contributing to the resistant shear force. Finally，combined with an example and the comparative analysis of the position of slip surface and the comprehensive safety factor in three kinds of different reduction ways，the rationality and reliability of the method was verified.

Key words： slope engineering softening characteristics double reduction factors strength reduction

引用本文:

薛海斌1，党发宁1，尹小涛2，杨超1，严飞3. 边坡强度参数非等比例相关联折减法研究[J]. 岩石力学与工程学报, 2015, 34(S2): 4005-4012.
XUE Haibin1，DANG Faning1，YIN Xiaotao2，YANG Chao1，YAN Fei3. RESEARCH ON METHOD OF SLOPE STRENGTH PARAMETERS NON-PROPORTIONAL ASSOCIATED REDUCTION. , 2015, 34(S2): 4005-4012.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.1216 或 https://rockmech.whrsm.ac.cn/CN/Y2015/V34/IS2/4005

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