Gema, Muhammad Gema (2026) ANALISIS JEMBATAN RANGKA BAJA (STUDI KASUS: JEMBATAN KAUJON, JALAN K.M IDRIS NO. 13, KEC. SERANG, KOTA SERANG, BANTEN). S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayas.

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Abstract

Indonesia has a diverse topography, resulting in many regions being separated by rivers, making bridge infrastructure a vital asset in supporting community mobility and economic growth. A crucial access point in Serang City, Banten, is the Kaujon Bridge, which utilizes a steel truss system with a triangular configuration to distribute axial loads efficiently. However, this bridge, which has been in operation since 2005, was designed using old planning standards that differ from the current regulations. In line with the development of more conservative design standards, a structural performance evaluation is essential to ensure long-term bridge safety against increasing load requirements. This study aims to re-analyze the structural capacity of the Kaujon Bridge in withstanding loads based on the latest Indonesian National Standards (SNI). The primary focus of the research includes evaluating the sectional capacity of main elements and examining deflection values compared to the allowable deflection limits under the newest regulations. The analysis covers various structural components, ranging from the superstructure to the substructure. The structural design refers to SNI 1725:2016, SNI 1729:2020, ACI 318-14, and AASHTO-LRFD 2012. Calculations were performed using Microsoft Excel, Midas Civil 2022, and spColumn software. The results indicate that all structural elements of the Kaujon Bridge are still capable of withstanding the loads according to the latest SNI standards. In tension and compression elements, the design strength (φRn) remains greater than the factored load (Pu), including the connections and floor slabs, which are technically declared safe. The substructure, consisting of abutments and pile foundations, is also proven capable of carrying the working load combinations. Based on the serviceability limit state review, the maximum allowable deflection for the bridge (L/800) is 40 mm. The calculation results show that the largest deflection occurs in the Service 2-TD combination at 39.96 mm. Thus, it can be concluded that the Kaujon Bridge still meets the strength and serviceability requirements in accordance with the prevailing national standards

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