应变软化边坡稳定性分析方法研究_薛海斌.pdf

DOI 10.11779/CJGE201603022 FLAC Matlab TU431 A 2016 (1988 ) E-mail: xhbyts2013@163.com Stability analysis methods for strain-softening slopes 1 1 2 3 2 XUE Hai-bin , DANG Fa-ning , YIN Xiao-tao , LEI Man , DENG Qin (1. Institute of Geotechnical Engineering, Xian University of Technology, Xian 710048, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Scegc Mechanized Construction Group Company Ltd., Xian 710043, China) Abstract: Designing and analyzing the rock-soil slope with strain-softening behaviors according to the peak strength tends to cause potential safety hazards, while that according to the residual strength tends to increase costs. The stability analysis methods for slopes considering strain-softening behaviors are of great significance. Based on the strain-softening constitutive relation, the progressive destruction of a slope is simulated in FLAC first. Then the slip surface is determined by the maximum shear strain increment. The vector sum method for stability analysis of the strain-softening slope is accomplished by Matlab based on the temporal-spatial distribution of strength parameters on the slip su