Evaluation of Longitudinal Strength of a Cargo Barge Based on Shear Force and Still Water Bending Moment under Various Loading Conditions: Evaluation of Longitudinal Strength of a Cargo Barge Based on Shear Force and Still Water Bending Moment under Various Loading Conditions

Budhi Santoso; Romadhoni Romadhoni; Jamal Jamal; Deny Nusyirwan; Naufal Abdurrahman; Zulfaidah Ariany

doi:10.35718/ismatech.v4i1.8481958

Authors

Budhi Santoso Department of Naval Architecture, Polytechnic of Bengkalis
Romadhoni Department of Naval Architecture, Polytechnic of Bengkalis
Jamal Department of Naval Architecture, Polytechnic of Bengkalis
Deny Nusyirwan MarineEngineering Study Program, Faculty of Maritime Engineering and Technology, Raja Ali Haji Maritime University
Naufal Abdurrahman Marine Engineering Technology Study Program, Batam State Polytechnic
Zulfaidah Ariyany Department of Industrial Technology, Vocational College, Universitas Diponegoro

DOI:

https://doi.org/10.35718/ismatech.v4i1.8481958

Keywords:

Cargo barge, Hull girder response, Loading condition, Longitudinal strength, Shear force

Abstract

ABSTRACT – Longitudinal strength is a fundamental aspect of barge structural safety because variations in loading magnitude and load position may significantly affect the global hull girder response. This study aims to evaluate the longitudinal strength of a cargo barge based on shear force and still water bending moment under various loading conditions. The object of the study is a cargo barge with principal dimensions of 330 ft × 90 ft × 21 ft and a lightship weight of 1802.9 tons. The analysis was carried out using a still-water longitudinal strength approach based on the distribution of weight and buoyancy along the vessel length. Six loading conditions were investigated, namely lightship, fully loaded, partially loaded at 50%, and three crane-shift positions at the aft, midship, and fore sections. The net load distribution was obtained from the difference between distributed weight and buoyancy, and then integrated to determine the shear force and still water bending moment along the hull. The results show that the fully loaded condition produced the most critical structural response, with a maximum shear force of 0.385 × 10³ ton at Frame 50 and a maximum still water bending moment of -6.212 × 10³ ton·m at Frame 35. In contrast, the lightship condition generated the lowest internal force response. All evaluated loading conditions remained below the permissible shear force and still water bending moment limits, indicating that the barge satisfies the applicable longitudinal strength requirements. The study concludes that the vessel is structurally acceptable under all investigated loading scenarios, with the fully loaded condition representing the governing case for safe operation and load planning.

Author Biographies

Jamal, Department of Naval Architecture, Polytechnic of Bengkalis

Department of Naval Architecture

Zulfaidah Ariyany, Department of Industrial Technology, Vocational College, Universitas Diponegoro

Department of Industrial Technology, Vocational College

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Evaluation of Longitudinal Strength of a Cargo Barge Based on Shear Force and Still Water Bending Moment under Various Loading Conditions