PSI - Issue 38

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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

ScienceDirect

Procedia Structural Integrity 38 (2022) 588–595

© 2021 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 the scientific committee of the Fatigue Design 2021 Organizers © 2021 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 the scientific committee of the Fatigue Design 2021 Organizers have been already proposed. In this study, focusing on fatigue cracking at welded joints betw en trough r bs and cross ribs, counterme sures for existi g structures and renewal and newly established structures are proposed, and verifie th ough fatigue tests using a large specime with similar scal as actual OSD st uctur s. Prin ipal r sults btain d through this study are as follow . By r t ofit sing TRS nd angles for he existing tructur , the sufficie t effect of prev ntive countermeasure and po t countermeasure against fatigue cracking at w ld d joints betwe n trough ribs and ross ribs has bee v rified through fatig e tests. However, fatigue cracking at welded joints b tween a deck pl e and t ough ribs c uld not be prevented. In the new struc ure, any cracks have not been initiated from the connection between a trough rib and a cross rib, and a deck plate. The sufficient fatigue durability was confirmed. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND lic nse (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Proposal and Verification of Countermeasures against Fatigue Cracking from Weld Joints between Trough Ribs and Cross Ribs in Orthotropic Steel Decks Yuichi Shiraishi a , Masahirro Sakano a , Chihiro Sakamoto b , Hideyuki Konishi c , Koichi Omori d a Kansai University, Osaka, Japan b Japan Consultant Association, Osaka, Japan c Japan Bridge Association, Osaka, Japan d Ministry of Land Infrastructurre and Transport, Osaka, Japan Orthotropic steel decks (OSDs) have a problem on fatigue durability, while OSDs have advantages of light weight and short construction time. The effective countermeasure against fatigue cracking at welded joints between a deck plate and trough ribs have been already proposed. In this study, focusing on fatigue cracking at welded joints between trough ribs and cross ribs, countermeasures for existing structures and renewal and newly established structures are proposed, and verified through fatigue tests using a large specimen with similar scale as actual OSD structures. Principal results obtained through this study are as follows. By retrofit using TRS and angles for the existing structure, the sufficient effect of preventive countermeasure and post countermeasure against fatigue cracking at welded joints between trough ribs and cross ribs has been verified through fatigue tests. However, fatigue cracking at welded joints between a deck plate and trough ribs could not be prevented. In the new structure, any cracks have not been initiated from the connection between a trough rib and a cross rib, and a deck plate. The sufficient fatigue durability was confirmed. FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Proposal and Verification of Countermeasures against Fatigue Cracking from Weld Joints between Trough Ribs and Cross Ribs in Orthotropic Steel Decks Yuichi Shiraishi a , Masahirro Sakano a , Chihiro Sakamoto b , Hideyuki Konishi c , Koichi Omori d a Kansai University, Osaka, Japan b Japan Consultant Association, Osaka, Japan c Japan Bridge Association, Osaka, Japan d Ministry of Land Infrastructurre and Transport, Osaka, Japan Abstract Orthotropic steel decks (OSDs) have a problem on fatigue d rability, while OSDs have advantages of light weigh and short construction time. The eff ctive countermeasure against ti r i at elded joints betwe n a deck plate trough ribs Abstract

Keywords: Orthotropic steel decks, retrofitting method, fatigue test, TRS Keywords: Orthotropic steel decks, retrofitting method, fatigue test, TRS

2452-3216 © 2021 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 the scientific committee of the Fatigue Design 2021 Organizers 2452-3216 © 2021 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 the scientific committee of the Fatigue Design 2021 Organizers

2452-3216 © 2021 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 the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.060