Japan Society of Civil Engineers 2019 Annual Meeting

Presentation information

第I部門

診断・補修・補強 (4)

Tue. Sep 3, 2019 4:40 PM - 6:10 PM I-5 (幸町北3号館 322講義室)

座長:小西 拓洋(東京都市大学)

[I-160] A study on improvement in redundancy of long span truss bridges

*石黒 博和1、田島 啓司2、麻生 稔彦1 (1. 山口大学大学院、2. エム・エムブリッジ)

Keywords:Redundancy, Long Span Truss Bridge, Reinforcement Measure, Remote Island Bridge, Loading Test

Redundancy has attracted attention since the accident of I-35W bridge in 2007. In previous studies, problems of redundancy in long span truss bridges were shown, but no concrete reinforcement measures have been considered. In this study, the examination of reinforcement measures aiming at improvement in redundancy of long span truss bridges is carried out. The reinforcement measure was planed by analysis, and the reinforcement effect was confirmed by loading test. As a result, the reinforcement measure of reverse diagonal member was devised. In addition, safety and load-carrying capacity performance of reinforced structure in the case of upper chord damage and vertical damage were confirmed.

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