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Faizal Mahmud
Fakultas Teknik, Universitas Semarang
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ANALISIS NUMERIK PERBANDINGAN NILAI FREKUENSI NATURAL DAN FREKUENSI BEBAN DINAMIS PADA STRUKTUR JEMBATAN RANGKA BAJA Bagus Acung Billahi; Kukuh Wisnuaji Widiatmoko; Faizal Mahmud; Muhammad Hanif; Anik Kustirini
Journal of Civil Engineering and Technology Sciences Vol. 5 No. 1 (2026): Vol. 5 No. 1 (2026): April: Journal of Civil Engineering and Technology Science
Publisher : Faculty Of Engineering University 17 August 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/2x6qy484

Abstract

Steel truss bridges are one type of structure that is widely used because they have high strength, relatively light weight, and ease in the construction process. However, their lightweight characteristics make this structure more sensitive to the influence of dynamic loads, especially traffic loads that can trigger repetitive vibrations. This study aims to analyze the natural frequency and dynamic load frequency values on steel truss bridges using a numerical analysis approach based on SAP2000 software. The numerical model is compiled based on primary and secondary data of the actual condition of the bridge. Modal analysis is carried out to obtain the natural frequency of the structure, while dynamic loading analysis is used to determine the external frequency generated by vehicle loads. The results show that the natural frequency of the first mode of the bridge is 3.2 Hz, while the dynamic load frequency is 5.5 Hz. The frequency ratio value obtained is 1.7, far outside the critical resonance range (0.9–1.1), so it can be concluded that the bridge is in a safe condition from potential resonance.
Co-Authors Anik Kustirini, Anik AR Hanung Triyono Bagus Acung Billahi Bambang Tutuko Dhamang Budi Cahyono Fahrudin Ahmad Fitria Maya Lestari Kukuh Wisnuaji Widiatmoko Lintang Enggartiasto Masvika, Hendra Muhammad Hanif Ngudi Hari Crista Son Haji Son Haji Sri Wanto