Journal of Structural Engineering, A
Online ISSN : 1881-820X
General Structural Engineering, Stability and Ultimate Strength: Article
A study on live load factor considering actual traffic load for evaluation of existing bridges
Toru KasamatsuYoshiaki OkuiMasashi KimuraRyota KanoSatoru SakumaHideo Tokida
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2023 Volume 69A Pages 58-68


Although B-live load is applied to bridge designs at present, considerable bridges had been designed with TL-20 in the previous design specifications. Most of these existing non-conformed bridges seem to be insufficient in load-carrying capacity under the current design code. In this study, a procedure for evaluating site-specific live load factors based on the actual traffic data for existing bridges is proposed. Two site-specific traffic data and three different girder bridges are employed to estimate live load factors for existing bridges as case study examples. The proposed method utilizes traffic-flow simulation and the generalized extreme-value distribution functions. The return period of the maximum bending moment for existing bridges is assigned to two intervals of the periodic bridge inspection.

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© 2023 by Japan Society of Civil Engineers
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