基于NURBS表示的三维土坡稳定分析  

Three-dimensional slope stability analysis based on NURBS simulation

作　　者：李亮[1,2] 陈祖煜[1] 迟世春[2] 郑榕明[3] 王玉杰[1] 

机构地区：[1]中国水利水电科学研究院岩土工程研究所,北京100044 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024 [3]香港理工大学土木与结构工程系,中国香港

出　　处：《岩土工程学报》2008年第2期212-218,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金重点资助项目(50539100);青年科学基金资助项目(50509027)

摘　　要：非均匀有理B样条作为计算机辅助设计领域的曲线和曲面的标准描述方式,已经得到广泛的应用。利用非均匀有理B样条产生三维土坡的滑动底面,利用极限平衡简布法计算滑动体的安全系数,在粒子群算法寻优策略的深刻理解之上,借鉴和声策略直接模拟群体的位置更新得到了新型混合粒子群算法。利用该混合粒子群算法搜索最危险的滑动体,对一均质土坡和一软弱夹层土坡进行了计算分析,比较证明本文所提方法可应用于三维土坡稳定分析。As a standard simulation procedure for curved lines and curved surfaces, the non-uniform rational B-spline has been widely used in the domain of computer-aided design. A three-dimensional sliding body was generated by using NURBS and the Janbu method based on the limit equilibrium was adopted to obtain the factor of safety for the given sliding body. The critical sliding body was found by using a new version of particle swarm optimization algorithm, in which the harmony search procedure was combined with the crucial search procedure using by PSO. A homogeneous soil slope and a complicated slope containing soft layer were analyzed using the proposed method and it was shown by comparative studies that the new method could be adopted in the three-dimensional slope stability analysis.

关 键 词：边坡稳定 极限平衡法 安全系数 简布法 NURBS粒子群算法 

分 类 号：TU441[建筑科学—岩土工程]