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| System reliability analysis of RC frame with non-perfect correlated loads |
| Received:June 06, 2007 |
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| DOI：10.7511/jslx20095002 |
| KeyWord:system reliability probability density evolution method fiber beam-column element non-perfect correlated loads |
| Author | Institution |
| 范文亮 |
重庆大学 土木工程学院,重庆 ;同济大学 土木工程学院 建筑工程系,上海 |
| 李杰 |
同济大学 土木工程学院 建筑工程系,上海 |
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| Abstract: |
| Currently, the assumption of perfect correlation is usually taken for the governing loads in system reliability analysis of frame structures. Little attention has been paid to non-perfect correlation research, especially for imperfect elastoplastic structures and imperfect elastobrittle structures. In the present paper, based on the recently proposed probability density evolution method (PDEM), the probability density evolution equations for the nonlinear evolution process of frames and for the margin capacity with loading parameter as time variables are firstly derived. Then, adopting the structural nonlinear analysis based on the fiber beam-column element, the system reliability of RC frames subjected to non-perfect correlated loads was calculated. Finally, the reliability of a 2-story 2-bay RC frame involving random parameters was numerically investigated. The results show that the influence of load correlation on reliability analysis cannot be neglected. Furthermore, in comparison to the Monte Carlo simulation, the proposed method is accurate and more efficient for the reliability analysis of RC frames with non-perfect correlated loads. |
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