基于遗传算法的土钉支护结构整体稳定性分析  

Integral stability analysis of soil-nail braced structure based on Genetic Algorithms

作　　者：胡长明[1] 黄双喜[2] 李文广[3] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]国内贸易工程设计研究院,北京100054 [3]同济大学地下建筑与工程系,上海200092

出　　处：《西安建筑科技大学学报（自然科学版）》2005年第3期332-336,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省教育厅专项科研基金项目(03JK137)

摘　　要：针对极限平衡理论分析土钉支护的边坡整体稳定性的缺点,采用对数螺旋曲线很好地模拟了实际滑裂面,建立了求解土钉支护结构整体稳定安全系数的模型,利用极限分析中的上限理论推导了土钉支护结构整体稳定安全系数的表达式.用遗传算法作为计算工具,并用V isua l C++编制了程序,实现了土钉支护结构整体稳定最小安全系数的自动寻优.解决了对数螺旋曲线滑裂面模拟土钉支护结构内部整体失稳时的真实滑裂面计算上的困难,从而使计算量很大、很繁琐的寻优过程得以实现.通过工程实例计算,表明该方法是行之有效的.The logarithmic spiral surface, which is fairly suitable for stimulating the genuning sliding surface, is applied to erect the model which gets the integral stability safety factor of soil-nail braced structure. On the basis of the upper bound theorem of limit analysis, the expression of integral stability factor of safety of soil-nail braced structure is deduced to eliminate the drawbacks when computing the minimum factor of safety with the limit equilibrium method. To determine the general minimum factor of safety, the Genetic Algorithms is applied as a mathematical tool, and a computing program in Visual C＋＋ is implemented to make the optimization course reality. Logarithmic spiral surface is suitable for stimulating the critical slip surface of soil-nail bracing structure, but this method has computational difficulty. The difficulty is overcome with the method in this paper, so the optimal course, very important but trivial, is realized. An example of soil nailing is calculated by the program, which indicates that this method is effective and feasible.

关 键 词：土钉支护结构 整体稳定 最小安全系数 最危险滑裂面 遗传算法 

分 类 号：TU432[建筑科学—岩土工程]