PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 925–931

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Static strength in adhesive joints with different patch plate end subjected to bending force Visal Thay a, *, Yuta Kanazawa b , Shuichi Fujikura a , Hitoshi Nakamura c , Hisakazu Horii d SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Static strength in adhesive joints with different patch plate end subjected to bending force Visal Thay a, *, Yuta Kanazawa b , Shuichi Fujikura a , Hitoshi Nakamura c , Hisakazu Horii d 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. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Adhesive joint; Adhesive debonding; Static strength; Patch plate end; Bending force © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers a Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi 321-8585, Japan b Sogo Engineering Inc., 7-6-4 Kameido, Koto, Tokyo 136-0071, Japan c Tokyo Metropolitan University, 1-1 Minamiosawa, Hachioji, Tokyo 192-0397, Japan d Konishi Co., Ltd., 5-3-35 Nishibori, Sakura, Saitama 338-0832, Japan a Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi 321-8585, Japan b Sogo Engineering Inc., 7-6-4 Kameido, Koto, Tokyo 136-0071, Japan c Tokyo Metropolitan University, 1-1 Minamiosawa, Hachioji, Tokyo 192-0397, Japan d Konishi Co., Ltd., 5-3-35 Nishibori, Sakura, Saitama 338-0832, Japan 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. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Adhesive joint; Adhesive debonding; Static strength; Patch plate end; Bending force

* Corresponding author. Tel.: +81-28-689-6210 E-mail address: vthay@cc.utsunomiya-u.ac.jp * Corresponding author. Tel.: +81-28-689-6210 E-mail address: vthay@cc.utsunomiya-u.ac.jp

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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