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Structural Monitoring and Maintenance
  Volume 9, Number 4, December 2022 , pages 323-336
 open access

Reliability evaluation of steel truss bridge due to traffic load based on bridge weigh-in-motion measurement
Widi Nugraha , Indra Djati Sidi, Made Suarjana and Ediansjah Zulkifli

    Steel truss bridge is one of the most widely used bridge types in Indonesia. Out of all Indonesia's national roads, the number of steel truss bridges reaches 12% of the total 17,160 bridges. The application of steel truss bridges is relatively high considering this type of bridge provides advantages in the standardization of design and fabrication of structural elements for typical bridge spans, as well as ease of mobilization. Directorate of Road and Bridge Engineering, Ministry of Works and Housing, has issued a standard design for steel truss bridges commonly used in Indonesia, which is designed against the design load in SNI 1725-2016 Bridge Loading Standards. Along with the development of actual traffic load measurement technology using Bridge Weigh-in-Motion (B-WIM), traffic loading data can be utilized to evaluate the reliability of standard bridges, such as standard steel truss bridges which are commonly used in Indonesia. The result of the B-WIM measurement on the Central Java Pantura National Road, Batang – Kendal undertaken in 2018, which supports the heaviest load and traffic conditions on the national road, is used in this study. In this study, simulation of a sequences of traffic was carried out based on B-WIM data as a moving load on the Australian type Steel Truss Bridge (i.e., Rangka Baja Australia – RBA) structure model with 60 m class A span. The reliability evaluation was then carried out by calculating the reliability index or the probability of structural failure. Based on the analysis conducted in this study, it was found that the reliability index of the 60 m class A span for RBA bridge is 3.04 or the probability of structural failure is 1.18 x 10-3, which describes the level of reliability of the RBA bridge structure due to the loads from B-WIM measurement in Indonesia. For this RBA Bridge 60 m span class A, it was found that the calibrated nominal live load that met the target reliability is increased by 13% than stated in the code, so the uniform distributed load will be 7.60 kN/m2 and the axle line equivalent load will be 55.15 kN/m.
Key Words
    B-WIM; bridge; moving load; reliability; steel truss
Widi Nugraha: Directorate General of Highways, Ministry of Public Works and Housing,
Jl AH Nasution No 264 Bandung, Republic of Indonesia;
Department of Civil Engineering, Institut Teknologi Bandung,
Jl Ganesha No 10 Bandung, Republic of Indonesia
Indra Djati Sidi, Made Suarjana and Ediansjah Zulkifli: Department of Civil Engineering, Institut Teknologi Bandung,
Jl Ganesha No 10 Bandung, Republic of Indonesia

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