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| Fatigue reliability analysis of orthotropic steel bridge deck based on LHS-Kriging method |
| Received:May 02, 2017 Revised:October 08, 2017 |
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| DOI：10.7511/jslx20170502001 |
| KeyWord:bridge engineering orthotropic steel bridge deck fatigue reliability random traffic flow LHS Kriging method |
| Author | Institution |
| 李德如 |
长沙理工大学 土木与建筑学院, 长沙 |
| 刘扬 |
长沙理工大学 土木与建筑学院, 长沙 |
| 鲁乃唯 |
长沙理工大学 土木与建筑学院, 长沙 |
| 张海萍 |
长沙理工大学 土木与建筑学院, 长沙 |
| 江楠 |
长沙理工大学 土木与建筑学院, 长沙 |
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| Abstract: |
| In order to solve the time-consuming problem of finite element solution of fatigue stress spectrum of orthotropic steel bridge under random vehicles,Latin Hypercube Sampling(LHS)and Kriging method were used to establish a LHS-Kriging finite element replacement model for quickly obtaining the detailed fatigue stress spectrum under random traffic flow.And the proposed replacement model was applied to fatigue reliability calculation of orthotropic steel bridge decks of Nanxi Yangtze River Bridge.The results show:the detailed fatigue stress spectrum can be rapidly obtained by the LHS-Kriging finite element replacement model without large number of finite element analyses;compared with the RSM method,the predicted value of the Kriging method is more consistent with finite element calculation;with the increase of traffic growth rate,the fatigue reliability of bridge is significantly reduced;after 100 years,the fatigue reliability between the orthotropic bridge deck and longitudinal rib welding is less than 2 when the traffic growth rate is 3% and 5%. |