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Strength and behavior of reinforced double-coped beams against local web buckling
Angus C.C.Lam2; Michael C.H.Yam3; ChengFang1
Source PublicationJournal of Constructional Steel Research

Double-coped beams are usually employed to avoid spatial interference when similar elevations of both the top and bottom flanges of the connected beams are required. Due to the removal of the flange parts, the load resistance can be significantly compromised. This paper discusses the effectiveness of various reinforcing strategies aiming to increase the load resistance of newly designed double-coped beams or to upgrade the existing ones. A series of full-scale tests are conducted first, covering a set of reinforcement types and varying coping dimensions. Local web buckling is found to be the governing failure mode for the unreinforced specimens, and the presence of the considered stiffeners can effectively increase the load resistance. In particular, a pair of longitudinal stiffenersfor the top cope edge is shown to completely mitigate the risk of local web buckling, and the final failure mode is tensile cracking at the bottom cope corner. The doubler plates, either full-depth or partial-depth, can delay the initiation of local web bucking, and as a result the load resistance is remarkably increased. The effects of the varying reinforcement types and coping dimensions on the utilisation efficiency of section capacities are discussed in detail. A finite element study is subsequently conducted to enable further understanding of key structural characteristics and to help explain some test phenomena. Preliminary designcomments and recommendations are finally proposed based on the exiting test and numerical data.

KeywordDouble-coped Beams (Dcbs) Full-scale Tests Numerical Study Local Web Buckling (Lwb) Reinforced
Indexed BySCIE
WOS Research AreaConstruction & Building Technology ; Engineering
WOS SubjectConstruction & Building Technology ; Engineering, Civil
WOS IDWOS:000418213100003
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
Corresponding AuthorChengFang
Affiliation1.Department of Structural Engineering, School of Civil Engineering, Tongji University, Shanghai 200092, China
2.Department of Civil & Environmental Engineering, University of Macau, Macau
3.Department of Building & Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Angus C.C.Lam,Michael C.H.Yam,ChengFang. Strength and behavior of reinforced double-coped beams against local web buckling[J]. Journal of Constructional Steel Research,2017,138:38-50.
APA Angus C.C.Lam,Michael C.H.Yam,&ChengFang.(2017).Strength and behavior of reinforced double-coped beams against local web buckling.Journal of Constructional Steel Research,138,38-50.
MLA Angus C.C.Lam,et al."Strength and behavior of reinforced double-coped beams against local web buckling".Journal of Constructional Steel Research 138(2017):38-50.
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