Experimental study on stainless steel plate girders subjected to #br#
bending and shear interaction
Yuan Huanxin1,2 Chen Xiaowan1,2,3 Xiang Hu4 Du Xinxi1,2
1. School of Civil Engineering, Wuhan University, Wuhan 430072, China;
2. Hubei Provincial Key Laboratory of Safety for Geotechnical and Structural Engineering, Wuhan University, Wuhan 430072, China;
3. Shantou University, Shantou 515000, China; 4.CITIC General Institute of Architectural Design and Research Co., Ltd., Wuhan 430014, China
Abstract：To study the load-carrying capacities of stainless steel plate girders under bending and shear (M-V) interaction, six welded stainless steel plate girders were tested. The failure modes of all test specimens appear to be the shear buckling in the web panel and the local compression buckling in both the web and the upper flange. Furthermore, the experimental tests were simulated by refined finite element (FE) models in consideration of the material and geometric nonlinearities, the initial local geometric imperfections and the welding residual stresses. Based on the test and FE results, the M-V design provisions for the post-buckling capacities of web panels, which are specified in the Chinese standard ‘Standard for design of steel structures (GB 50017—2017)’, were evaluated. The analysis results revealed that: when the ultimate load-carrying capacity of girder is dominated by shear buckling, the capacity predicted by the Standard is relatively conservative if the regularized width-to-thickness ratio of the web is large; while that predicted by the Standard agrees well with the test and FE results if the regularized width-to-thickness ratio of the web is small. When the ultimate load-carrying capacity of girder is dominated by the combined bending and shear buckling, the capacity predicted by the Standard is relatively safe. Generally, it can be concluded that the calculation method in the Standard of GB 50017—2017 may be directly applied to the ultimate load-carrying capacity of stainless steel plate girders under the combined bending and shear.
