Abstract
Adhesively debonding from the end of patch plates is one of the major concerns in the application of externally bonded joint methods for repairing or strengthening steel structures. This paper focuses on enhancing the adhesive strength of adhesively bonded joints by investigating different patch plate end configurations. The target specimen model was the adhesively bonded joints of the single patch plate adhered to the base plate subjected to the bending force. The epoxy resin Konishi E258R was used as the adhesive in this study. Four different patch plate end types of specimen models were analytically and experimentally investigated (without end design, end design with fillet, end design with reverse taper, and end design using a reverse taper with a partially chamfered end of the patch plate). The elastic analysis was conducted by modeling using MSC Marc/Mentat 2022 by shell elements with perfect bond between steel and adhesive layer. The static tests of the single patch plate bonded joints (three specimens for each cases) were conducted under bending force (cantilever beam). The result shows that the static strength of the adhesively bonded joint is significantly increased for each tapered design of the patch plate end.
Published Version
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