Experimental and Numerical Study on Buckling Behavior of a Rigidly Stiffened Plate with Tee Ribs
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In the bridge structures, stiffened plates are usually designed as rigidly stiffened when the orthotropic steel box girder is used as the main load-bearing structure. Therefore, the buckling mode of stiffened plates is plate buckling which occurs in subpanel supported by stiffeners. The orthotropic steel box girder is used as the main girder for Egongyan Rail Special Bridge, which is a self-anchored suspension bridge. Plates of the steel girder are rigidly stiffened with unequal spacing open ribs, and the most slender stiffened plate is the mid web stiffened with Tee ribs. In order to ensure the safety of the bridge, the buckling behavior of the web and orthotropic steel box girder under axial compression, including ultimate strength, post-buckling behavior and failure modes, should be clearly investigated by experimental and numerical methods. The design, loading and testing methods of the 1:4 scale model of the orthotropic steel box girder are introduced in detail firstly. The orthotropic steel box girder and the stiffened web finite element (FE) models are validated by the test results, and the effects of residual stress and the magnitude of geometric imperfections are discussed roughly. Based on the validated web FE model, a detailed parametric study is performed to systematically investigate the effects of residual stress and geometric imperfections on buckling behavior of the web. The effect of shapes of geometric imperfections discussed is highlighted. Through tracing stress states, the failure modes of stiffened plate are in agreement with the experimental phenomenon to some extent. Results show that shapes of geometric imperfections have significantly influenced post-buckling behavior and failure modes of the web, but slightly affected the ultimate strength. It is advised that residual stress and geometric imperfections should be controlled to make full use of excellent performance of steel materials.
KeywordsSelf-anchored suspension bridge Orthotropic steel box girder Rigid stiffened plate Axial compressive experiment Geometric imperfections Residual stress Tee ribs Buckling
This paper was financially supported by the National Natural Science Foundation of China (Grant No. 51178396/E080505).
- Carlsen, C. A., & Czujko, J. (1978). The specification of post-welding distortion tolerances for stiffened plates in compression. Structural Engineer, 56, 133–141.Google Scholar
- Chatterjee, S. (2008). The design of modern steel bridges (2nd ed.). Hoboken: Blackwell Science Ltd.Google Scholar
- Chou, C. C., Mcdaniel, C. C., Uang, C. M. & Seible, F. (2003). Numerical and experimental investigation of steel structural component of New San Francisco–Oakland Bay Bridge. Computational Fluid & Solid Mechanics, 192–196.Google Scholar
- Dong, K. S., Dat, B. V., & Kim, K. (2014). Compressive strength of HPS box girder flanges stiffened with open ribs. Journal of Constructional Steel Research, 95(4), 230–241.Google Scholar
- Dong, K. S., Le, V. A., & Kim, K. (2013). In-plane ultimate compressive strengths of HPS deck panel system stiffened with U-shaped ribs. Thin-Walled Structures, 63(63), 70–81.Google Scholar
- Li, L. F., Shao, X. D., & Yi, W. J. (2007). Model test on local stability of flat steel box girder. China Journal of Highway and Transport, 20, 60–65. (in Chinese).Google Scholar
- Ministry of Transport of the People’s Republic of China. (2015). Specifications for design of highway steel bridge: JTG D64-2015.Google Scholar
- Standards, B. (2006). Eurocode 3—design of steel structures - part 1-5: plated structural elements. Google Scholar