Elastic local buckling behaviour of corroded cold-formed steel columns

다국어 초록 (Multilingual Abstract)

Under the long-term effect of corrosive environment, many cold-formed steel (CFS) structures have serious corrosion problems. Corrosion leads to the change of surface morphology and the loss of section thickness, which results in the change of instability mode and failure mechanism of CFS structure. This paper mainly investigates the elastic local buckling behavior of corroded CFS columns. The surface morphology scanning test was carried out for eight CFS columns accelerated corrosion by the outdoor periodic spray test. The thin shell finite element (FE) eigen-buckling analysis was also carried out to reveal the influence of corrosion surface characteristics, corrosion depth, corrosion location and corrosion area on the elastic local buckling behaviour of the plates with four simply supported edges. The accuracy of the proposed formulas for calculating the elastic local buckling stress of the corroded plates and columns was assessed through extensive parameter studies. The results indicated that for the plates considering corrosion surface characteristics, the maximum deformation area of local buckling was located at the plates with the minimum average section area. For the plates with localized corrosion, the main buckling shape of the plates changed from one half-wave to two half-wave with the increase in corrosion area length. The elastic local buckling stress decreased gradually with the increase in corrosion area width and length. In addition, the elastic local buckling stress decreased slowly when corrosion area thickness was relatively large, and then tends to accelerate with the reduction in corrosion area thickness. The distance from the corrosion area to the transverse and longitudinal centerline of the plate had little effect on the elastic local buckling stress. Finally, the calculation formula of the elastic local buckling stress of the corroded plates and CFS columns was proposed.

참고문헌 (Reference)

• 1 Teixeira, A., "Ultimate strength of plates with random fields of corrosion" 4 (4): 363-370, 2008
• 2 Rahbar-Ranji, A., "Ultimate strength of corroded steel plates with irregular surfaces under in-plane compression" 54 : 261-269, 2012
• 3 Paik, J. K., "Ultimate shear strength of plate elements with pit corrosion wastage" 42 (42): 1161-1176, 2004
• 4 Paik, J. K., "Ultimate compressive strength of plate elements with pit corrosion wastage" 217 (217): 185-200, 2003
• 5 G. Beulah Gnana Ananthi ; Krishanu Roy ; Boshan Chen ; James B.P. Lim, "Testing, simulation and design of back-to-back built-up cold-formed steel unequal angle sections under axial compression" 국제구조공학회 33 (33): 595-614, 2019
• 6 Nie, B., "Surface morphology characteristics and mechanical properties of corroded cold-formed steel channel sections" 10 : 102786-, 2021
• 7 Tao, Y., "Study on Stability Behaviour of Cold-Formed Thin-Walled Steel Lipped Channel Columns with V-shaped Stiffened Web Under Axial Load" Harbin Institute of Technology 2012
• 8 Wang, Y., "Stochastic constitutive model of structural steel based on random field of corrosion depth" 16 : e00972-, 2022
• 9 Melchers, R. E., "Statistical characterization of surfaces of corroded steel plates" 23 (23): 274-287, 2010
• 10 Cheng, J., "Stability Theory and Design of Steel Structures" Science Press 2001
• 11 Garbatov, Y., "Spatial corrosion wastage modeling of steel plates exposed to marine environments" 141 (141): 031602-, 2018
• 12 Youde Wang ; Tao Shi ; Biao Nie ; Hao Wang ; Shanhua Xu, "Seismic performance of steel columns corroded in general atmosphere" 국제구조공학회 40 (40): 217-241, 2021
• 13 Soares, C. G., "Reliability of maintained ship hulls subjected to corrosion" 40 (40): 235-243, 1996
• 14 Mateus, A., "On the post-buckling of corroded steel plates used in marine structures" 140 : 165-183, 1998
• 15 Silvestre, N., "Nonlinear generalized beam theory for cold-formed steel members" 3 (3): 461-490, 2003
• 16 Casafont, M., "Linear buckling analysis of thin-walled members combining the generalised beam theory and the finite element method" 89 (89): 1982-2000, 2011
• 17 Schardt, R., "Generalized beam theory-an adequate method for coupled stability problems" 19 (19): 161-180, 1994
• 18 "Gb/T 24517, Corrosion of Metals and Alloys, Outdoors Exposure Test Methods for Periodic Water Spray"
• 19 "Gb/T 10125, Corrosion Tests in Artificial Atmospheres-Salt Spray Tests"
• 20 Nie, B., "Experimental investigation on corroded cold-formed steel beam-columns under compression and major axis bending" 169 : 106026-, 2020
• 21 Nie, B., "Experimental investigation of mechanical properties of corroded cold-formed steels" 162 : 105706-, 2019
• 22 Nie Biao ; Xu Shanhua ; Zhang Haijiang ; Zhang Zongxing, "Experimental and numerical studies on the behaviour of corroded cold-formed steel columns" 국제구조공학회 35 (35): 611-625, 2020
• 23 Tao, Y., "Elastic local buckling analysis of cold-formed thin-walled steel lipped channel column with holes" 45 (45): 59-62, 2015
• 24 Moen, C. D., "Elastic buckling of thin plates with holes in compression or bending" 47 (47): 1597-1607, 2009
• 25 Moen, C. D., "Elastic buckling of cold-formed steel columns and beams with holes" 31 (31): 2812-2824, 2009
• 26 Nakai, T., "Effect of pitting corrosion on the ultimate strength of steel plates subjected to in-plane compression and bending" 11 (11): 52-64, 2006
• 27 Nakai, T., "Effect of pitting corrosion on local strength of hold frames of bulk carriers (1st report)" 17 (17): 403-432, 2004
• 28 Nie, B., "Effect of corrosion on the buckling behaviour of cold-formed steel channel section columns under axial compression" 23 (23): 70-, 2023
• 29 Xu, S. H., "Effect of cleaned corrosion surface topography on mechanical properties of cold-formed thin-walled steel" 222 : 1-14, 2019
• 30 Teng, J. G., "Distortional buckling of channel beam-columns" 41 (41): 595-617, 2003
• 31 Cheng, J., "Direct strength method for the design of cold-formed lipped channel members" 5 (5): 5-13, 2003
• 32 Moen, C.D., "Direct Strength Design of Cold-Formed Steel Members with Perforations" Johns Hopkins University 2009
• 33 Ye, J., "Development of more efficient cold-formed steel channel sections in bending" 101 (101): 1-13, 2016
• 34 Soares, C. G., "Design equation for the compressive strength of unstiffened plate elements with initial imperfections" 9 (9): 287-310, 1988
• 35 Garbatov, Y., "Corrosion wastage modeling of deteriorated ship Structures" 55 : 109-125, 2008
• 36 Zhang, Z., "Comparative investigation of the effect of corrosion on the mechanical properties of different parts of thin-walled steel" 146 : 26-40, 2020
• 37 Ádány, S., "Buckling mode decomposition of single-branched open cross-section members via finite strip method: derivation" 44 (44): 563-584, 2006
• 38 Leach, P., "An experimental verification of the generalized beam theory applied to interactive buckling problems" 25 (25): 61-79, 1996
• 39 Paik, J. K., "A time-dependent corrosion wastage model for the structures of single and double-hull tankers and FSOs and FPSOs" 40 (40): 201-217, 2003
• 40 Feng, L., "A parametric study on effects of pitting corrosion on steel plate's ultimate strength" 9 : 102026-, 2020
• 41 Ádány, S., "A full modal decomposition of thin-walled, single-branched open cross-section members via the constrained finite strip method" 64 (64): 12-29, 2008