|
|||||
|
|
| 基于遗传算法的冻土路基融沉可靠性分析 | |
| 引用本文： | 祁长青,吴青柏,施斌,唐朝生.基于遗传算法的冻土路基融沉可靠性分析[J].岩土力学,2006,27(8):1429-1432. |
| 作者姓名： | 祁长青 吴青柏 施斌 唐朝生 |
| 作者单位： | 1. 河海大学,科学研究院,南京,210098;南京大学,地球环境计算工程研究所,南京,210093 2. 中国科学院,寒区旱区环境与工程研究所,兰州,730000 3. 南京大学,地球环境计算工程研究所,南京,210093 |
| 基金项目： | 国家自然科学基金;中国科学院科研项目 |
| 摘 要： | 在冻土路基融沉变形极限状态方程的基础上，从可靠度指标的几何涵义出发，提出了基于遗传算法的冻土路基融沉可靠度指标和失效概率的计算方法。该法是一种全局优化算法，能有效克服传统搜索算法易陷入局部极小值的缺点，不需要对功能函数进行直接转换，避免了功能函数比较复杂时所带来的求解困难，特别适合求解非线性规划问题。以青藏铁路冻土路基的具体实例，验证了本方法的准确性和有效性。 |
| 关 键 词： | 冻土路基 融沉变形 遗传算法 可靠度指标 破坏概率 |
| 文章编号： | 1000-7598-（2006）08-1429-04 |
| 收稿时间： | 2004-10-21 |
| 修稿时间： | 2004-10-212005-01-20 |
Reliability analysis of thawing settlement of permafrost subgrade based on genetic algorithm |
|
| QI Chang-qing,WU Qing-bai,SHI Bin,TANG Chao-sheng.Reliability analysis of thawing settlement of permafrost subgrade based on genetic algorithm[J].Rock and Soil Mechanics,2006,27(8):1429-1432. | |
| Authors: | QI Chang-qing WU Qing-bai SHI Bin TANG Chao-sheng |
| Institution: | 1. Research Academy of Hohai University, Nanjing 210098, China; 2. Advanced Computational Engineering Institute for Earth Environment, Nanjing University, Nanjing 210093, China; 3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
| Abstract: | On the basis of limit equilibrium equation for thawing settlement of permafrost subgrade, a global optimal algorithm is put forward to calculate the reliability index and failure probability based on genetic algorithm. It can overcome the drawbacks of local optimal wildly existing in classic searching method. By this method, difficulty brought by the transformation of complex performance function can be avoided and nonlinear programming problem can be solved efficiently. Engineering example of Qinghai-Tibet Railway shows that this method is accurate and reliable. |
| Keywords: | permafrost subgrade thawing settlement genetic algorithm reliability index failure probability |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《岩土力学》浏览原始摘要信息 | |
| 点击此处可从《岩土力学》下载免费的PDF全文 | |