PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 153–160

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Comparative Damage Assessment of Castellated Girders Anil Pradeep Konda a, *, Nirjhar Dhang a a Civil Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur-721302, India Abstract As castellated girders become more common in structural engineering, research has focused on typical failure modes such as web post-buckling, weld failure and fracture. However, researchers have paid less attention to quantitatively assessing damage in these girders. In this study, the authors investigated single and double damage scenarios in castellated girders. Compared to a solid plate girder of the exact dimensions, the castellated girder showed only a 1% difference in stiffness reduction in the single damage case involving a 5 mm cut in the bottom flange. The study also examined weld failure in both scenarios and found that stiffness significantly decreased when complete weld failure occurred in the web post. The authors concluded that the employed damage detection method was unreliable when complete weld failure occurred near the supports in the double damage scenario. Future work can explore partial weld failures to assess the method’s efficacy, and alternative approaches may be needed to quantify damage in cases of complete weld failure near supports.

© 2025 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 the responsibility of International Conference on Structural Integrity Organizers

Keywords: Castellated Girder; Damage Assessment; Steel Plate Girder; Static Deflections

1. Introduction Castellated beams have been a reliable steel construction method since they were patented in 1939. They are helpful for moderately loaded, longer spans Knowles and BS 5950, (1991). These beams gain extra depth by carefully cutting and re-welding a standard rolled steel section while keeping their weight relatively unchanged. Their geometry

* Corresponding author. Tel.: +91 98853 73183. E-mail address: k.anilpradeep@iitkgp.ac.in

2452-3216 © 2025 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 the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.038