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Steel and Composite Structures Volume 33, Number 4, November25 2019 , pages 537-550 DOI: https://doi.org/10.12989/scs.2019.33.4.537 |
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Reinforcement design of the top and bottom slabs of composite box girder with corrugated steel webs |
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Hu Zhao, Hongye Gou, Ying-Sheng Ni and Dong Xu
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| Abstract | ||
| Korea and Japan have done a lot of research on composite girders with corrugated steel webs and built many bridges with corrugated steel webs due to the significant advantages of this type of bridges. Considering the demanding on the calculation method of such types of bridges and lack of relevant reinforcement design method, this paper proposes the spatial grid analysis theory and tensile stress region method. First, the accuracy and applicability of spatial grid model in analyzing composite girders with corrugated steel webs was validated by the comparison with models using shell and solid elements. Then, in a real engineering practice, the reinforcement designs from tensile stress region method based on spatial grid model, design empirical method and specification method are compared. The results show that the tensile stress region reinforcement design method can realize the inplane and out-of-plane reinforcement design in the top and bottom slabs in bridges with corrugated steel webs. The economy and precision of reinforcement design using the tensile stress region method is emphasized. Therefore, the tensile stress region reinforcement design method based on the spatial grid model can provide a new direction for the refined design of composite box girder with corrugated steel webs. | ||
| Key Words | ||
| corrugated steel webs; composite girder bridge; grid reinforcement; tensile stress region; spatial grid analysis theory | ||
| Address | ||
| (1) Hu Zhao: China Railway Siyuan Survey and Design Group CO., LTD, Wuhan, Hubei province, 430063, P.R. China; (2) Hongye Gou: Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan province,611756, P.R. China; (3) Ying-Sheng Ni: Research Institute of Highway Ministry of Transport, M.O.T, Beijing, 100088, P.R. China; (4) Dong Xu: Department of Bridge Engineering, Tongji University, Shanghai, 200092, P.R. China. | ||