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| Analytical method for transverse wheel load local effect of orthotropic steel bridge deck |
| Received:February 01, 2021 Revised:March 26, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210201001 |
| KeyWord:steel bridge orthotropic deck local wheel load transverse stress closed form solution |
| Author | Institution |
| 郭增伟 |
重庆交通大学 省部共建山区桥梁及隧道工程国家重点实验室, 重庆 |
| 徐华 |
重庆交通大学 省部共建山区桥梁及隧道工程国家重点实验室, 重庆 |
| 贺煊博 |
重庆交通大学 省部共建山区桥梁及隧道工程国家重点实验室, 重庆 |
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| Abstract: |
| Structural characteristics of an orthotropic steel bridge deck were analyzed to simplify the analytical model for an orthotropic deck under local wheel loads.The specific sphere orthotropic deck affected by wheel loads were simplified to an elastic-supported frame model,which was proposed to analyze the local mechanical effects of an orthotropic deck around the wheel load.After derivation of the elastic support stiffness and effective load density,an analytical solution for the transverse bending stress in the top plate of the orthotropic deck was presented.Subsequently,the sensitive factors affecting the bending stress in the orthotropic deck were discussed and identified.A box girder bridge was taken as an example to confirm the proposed theoretical solution of local stress under the wheel load.The analysis results show that the discrepancy between the transverse stress values calculated by this analytical method and the finite element method are no more than 10%,which indicates that this proposed method is accurate and can be applied in the preliminary design of an orthotropic steel bridge deck conveniently.It can also be found out that the transverse stress in the top plate near the web of U-ribs increases with the thickness and height of U-rib increasing,but decreases with the thickness of top-plate and the space between two adjacent diaphragms increasing.Besides,the tensile stress in the bridge deck is most significantly affected by the thickness of the roof,but is not sensitive to the changes of the web angle and thickness of the U-rib. |
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