摘要
针对在确定具有最小可靠度指标的滑动面时蒙特卡罗法耗时长的问题,通过两个典型土坡,采用简化Bishop法计算滑动面的抗滑稳定安全系数从而构建了边坡可靠度分析的功能函数,利用圆弧构建潜在滑动面,利用Rosenblueth法计算每个潜在滑动面的可靠度指标,采用和声搜索算法搜索潜在滑动面的变化以寻求最小可靠度指标滑动面,并与常规极限平衡方法得到的最小安全系数对应的滑动面进行了比较。结果表明:简单均质土坡临界滑动面与最小可靠度指标滑动面基本重合,非均质土坡最小可靠度指标滑动面与临界滑动面相差较大,可靠度指标相差也较大,在具体应用时建议采用Rosenblueth法进行最小可靠度指标滑动面的确定。
The Monte-Carlo method is time consuming when it is used to find the slip surface with the minimum value of the reliability index.This paper aims to compare the slip surfaces calculated with the minimum factor of safety（namely the critical slip surface） and minimum value of the reliability index（namely the critical reliability slip surface）.A simplified Bishop method was adopted to calculate the safety factor for a given circular slip surface and to define the ultimate state function.The Rosenblueth method was used to determine the reliability index for the potential slip surface and the harmony search algorithm was used to alter the potential slip surface to find the critical reliability slip surface.The results show that the critical slip surface is identical to the critical reliability slip surface for homogeneous soil slopes,and the critical slip surface is considerably different from the critical reliability slip surface for the complicated soil slopes.The Rosenblueth method is recommended within the determination of the critical reliability of the slip surface.
出处
《水利水电科技进展》
CSCD
北大核心
2012年第3期53-55,66,共4页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金(51008167)
山东省高等学校科技计划(J10LE07)
教育部高等学校博士学科点专项(20103721120001)
