An experimental investigation of local web buckling strength and behaviour of compressive flange coped beam connections with slender web Michael C. H. Yam 1) , *Ke Ke 2) , Angus C. C. Lam 3) , Cheng Fang 4) and K. F. Chung 5) 1,2) Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China 3) Department of Civil and Environmental Engineering, University of Macau, Macau, China 4) Department of Structural Engineering, School of Civil Engineering, Tongji University, Shanghai, China 5) Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China 2) [email protected] ABSTRACT In a typical steel structure such as a steel frame or a steel bridge, flanges of secondary beams and primary beams at intersections of the members are often required to have identical elevations for architectural or structural purposes. Thus, at the secondary beam ends, cope at the comprehensive flange (top flange) may be required to accommodate the beam members and to eliminate interference of the intersecting members. In this context, resistance of the connection is unavoidably compromised, and hence local web buckling (LWB) in the vicinity of the connection may be triggered. In this work, an experimental study of the performance and LWB resistance of compressive flange coped beam connections with slender web is presented. Full-scale specimens were tested. A finite element (FE) study was also carried out to preliminarily evaluate the influence of critical parameters on the LWB behaviour of compressive flange coped beam connections with slender web. The test results and FE responses show that with increasing slenderness ratios of the web, post-buckling performance of compressive flange coped beam connections with slender web became evident, accompanied with a stable load carrying capacity after buckling occurred, especially for the specimen of a large cope length to beam depth ratio. The effectiveness of the current design approaches for quantifying the LWB strength of compressive flange coped beam connections with slender web was also assessed. It was found that predictions of the LWB resistance of compressive flange coped beam connections with the slender web by the current design equations are generally conservative.
An experimental investigation of local web buckling strength and behaviour of compressive flange coped beam connections with slender web
May 17, 2023
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