Evaluasi Numerik Kekuatan Dan Kemampuan Layan Jembatan Girder Komposit Baja Menggunakan Welded Beam SM490 Numerical Evaluation Of Strength And Serviceability Of Steel Composite Girder Bridges Using Welded Beam SM490
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Abstract
Composite Girder Bridge is a bridge construction consisting of profile steel material with reinforced concrete. The intact steel section profile used in the composite girder bridge is not produced by the manufacturer in Indonesia, so it uses a built-up section profile from high-strength plate grade SM490. Numerical Evaluation of the strength and serviceability of the bridge uses a nonlinear analysis method based on FEA software. Finite Element Analysis using ANSYS R2025 identifies the main structural components of steel in the form of SHELL181 and the concrete structure as SOLID65. Shell Model is used to represent the steel girder because the analysis results are close to the experimental test results of 91.20%. The results of ANSYS verification with node loading in the middle of the span using WB1350x12x20x20 obtained a performance of 74.44% against fu = 490 MPa, and reinforced concrete 44.207% against f'c = 30 MPa. Examination of the composite girder diaphragm system for serviceability with a distance between girders of 1.6 m obtained a performance of 2.960% below the standard load of 500 kN. After reinforcement with the addition of a cover plate and modification of the diaphragm, the steel deflection capacity was reduced to 58.39% while the concrete increased to 50.967%.
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