| Non-probabilistic fuzzy reliability analysis of pile foundation stability by interval theory |
| |
| 作者姓名： | 曹文贵 张永杰 赵明华 |
| |
| 作者单位： | Institute of Geotechnical Engineering Hunan University，Institute of Geotechnical Engineering Hunan University，Institute of Geotechnical Engineering Hunan University，Changsha 410082 China，Changsha 410082 China，Changsha 410082 China |
| |
| 基金项目： | 国家自然科学基金;湖南省自然科学基金 |
| |
| 摘 要： | Randomness and fuzziness are among the attributes of the influential factors for stability assessment of pile foundation. According to these two characteristics, the triangular fuzzy number analysis approach was introduced to determine the probability-distributed function of mechanical parameters. Then the functional function of reliability analysis was constructed based on the study of bearing mechanism of pile foundation, and the way to calculate interval values of the functional function was developed by using improved interval-truncation approach and operation rules of interval numbers. Afterwards, the non-probabilistic fuzzy reliability analysis method was applied to assessing the pile foundation, from which a method was presented for non- probabilistic fuzzy reliability analysis of pile foundation stability by interval theory. Finally, the probability distribution curve of non- probabilistic fuzzy reliability indexes of practical pile foundation was concluded. Its failure possibility is 0.91%, which shows that the pile foundation is stable and reliable.
|
| 关 键 词： | 桩基 地基 模糊可靠性分析 间隔理论 |
| 收稿时间： | 18 March 2007 |
| 修稿时间： | 2007-03-18 |
Non-probabilistic fuzzy reliability analysis of pile foundation stability by interval theory |
| |
| Cao Wen-gui , Zhang Yong-jie and Zhao Ming-hua.Non-probabilistic fuzzy reliability analysis of pile foundation stability by interval theory[J].Journal of Central South University of Technology,2007,14(6):864-869. |
| |
| Authors: | Cao Wen-gui Zhang Yong-jie and Zhao Ming-hua |
| |
| Affiliation: | Institute of Geotechnical Engineering, Hunan University, Changsha 410082, China |
| |
| Abstract: | Randomness and fuzziness are among the attributes of the influential factors for stability assessment of pile foundation. According to these two characteristics, the triangular fuzzy number analysis approach was introduced to determine the probability-distributed function of mechanical parameters. Then the functional function of reliability analysis was constructed based on the study of bearing mechanism of pile foundation, and the way to calculate interval values of the functional function was developed by using improved interval-truncation approach and operation rules of interval numbers. Afterwards, the non-probabilistic fuzzy reliability analysis method was applied to assessing the pile foundation, from which a method was presented for non- probabilistic fuzzy reliability analysis of pile foundation stability by interval theory. Finally, the probability distribution curve of non- probabilistic fuzzy reliability indexes of practical pile foundation was concluded. Its failure possibility is 0.91%, which shows that the pile foundation is stable and reliable. |
| |
| Keywords: | pile foundation fuzziness interval theory interval-truncation approach non-probabilistic fuzzy reliability analysis |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
