PSI - Issue 64

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 991–998

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Flexural Buckling Strength of Steel Angle with Reinforcement in Electric Transmission Towers Atsushi Sato a, *, Takahiro Kodani a , Shunichi Takagi a a Nagoya Institute of Technology, Nagoya 4668555, Japan Abstract In Japan, mid-sized electric transmission towers are made of steel angle members connected by high-strength bolts and are mainly designed to withstand wind loads. However, recent collapses due to the increasing wind intensity caused by climate change have led to a high demand for the reinforcement of conventional towers currently in operation. This paper reports the flexural buckling strength evaluation method for reinforced steel angle members under eccentric load. The study utilizes a theoretical approach to derive the evaluation formula, considering the effect of the eccentric load and the amount of reinforcement. Finally, small-scale experiments validate the proposed design formula, which can reasonably evaluate the strength of reinforced steel angle members. © 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: Flexural buckling strength; Steel Angle; Electric transmission tower; Eccentric joint; Reinforcement 1. Introduction In Japan, mid-sized electric transmission towers are constructed using steel angle members connected with high strength bolts that are tightened snugly (see Fig. 1a). These structures primarily endure wind loads, and their structural design follows specific Ministerial Ordinances (2019). Seismic design is not considered necessary due to © 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

* Corresponding author. Tel.: +81-52-735-5200. E-mail address: sato.atsush@nitech.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 10.1016/j.prostr.2024.09.384