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Effect of Steel Truss Configuration on Bridge Structural Strength and Seismic Response Lalu Samsul Aswadi; Dwi Sat Agus Yuwana; Bina Arumbinang Wajdi; Aisya Bhanuwati; Reyhan Daffa
Jurnal Teknik Sipil dan Perencanaan Vol. 28 No. 1 (2026): Jurnal Teknik Sipil dan Perencanaan
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v28i1.47805

Abstract

Located within the Pacific Ring of Fire, Indonesia experiences high seismic intensity, posing a risk of structural damage to bridges; thus, seismic load considerations are imperative in bridge engineering. Although bridge seismic analysis has been conducted, comparative studies of truss configurations under seismic loads remain limited. This study analyzes the influence of truss configurations, including Howe, Pratt, Warren, Quadrangular Warren, Whipple, Camel Back, Baltimore, K-Truss, and Petit Truss, under seismic loads through deflection and Demand Capacity Ratio (DCR) parameters. The analysis was performed using Midas Civil, a Finite Element Method software, while seismic loading was applied using the response spectrum method. The results show that the Camel Back Truss achieves the highest structural efficiency, yielding the lowest DCR, with a maximum of 0.064693 and 0.1503 for the mean. Regarding serviceability, Petit Truss exhibited the minimum deflection values of 0.02735 m, 0.02482 m, and 0.02493 m for Service I (TD), Service I (TT), and Extreme I, respectively. Overall, Camel Back Truss provides the best structural performance by maintaining the lowest stress ratio and the second-lowest deflection, recorded at 0.02725 m and 0.03897 m under Service I and 0.02818 m under Extreme I loads, respectively.
Studi Pengaruh Variasi Tinggi Balok I-Joist Dari Kombinasi Blockboard Lokal Dan Kayu Mahoni Terhadap Kekuatan Lentur Yudhi Arnandha; Muhammad Ilham Hafidhuddin; Julian Putra Rukmana; Anis Rakhmawati; Lalu Samsul Aswadi
JURNAL ILMIAH TEKNIK INDUSTRI DAN INOVASI Vol. 4 No. 3 (2026): Juli : Jurnal Ilmiah Teknik Industri dan Inovasi
Publisher : CV. ALIM'SPUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/jisi.v4i3.1926

Abstract

Pemanfaatan blockboard untuk plat lantai di Indonesia masih terbatas, padahal Magelang memiliki potensi produksi yang baik. Penelitian ini mengevaluasi pemanfaatan blockboard sebagai web dan kayu mahoni sebagai flens pada balok penyangga plat lantai kayu berbentuk I-Joist dan untuk mengetahui nilai Modulus of Rupture (MoR) dan Modulus of Elasticity (MoE) pada balok I-Joist .Metodologi menggunakan pengujian eksperimental berdasarkan ASTM D198-2015 dengan panjang balok I-Joist 200 cm, variasi tinggi 22, 24, 26, 28, dan 30 cm, dan setiap variasi terdiri dari dua benda uji. Fabrikasi dilakukan di SMK N 1 Magelang dan pengujian di Laboratorium Teknik Sipil Universitas Tidar.Hasil menunjukkan peningkatan tinggi tidak selalu berbanding lurus dengan kekuatan lentur. Nilai MoR: 22 cm (5,9333 MPa), 24 cm (7,2786 MPa), 26 cm (6,3287 MPa), 28 cm (6,0426 MPa), 30 cm (6,2524 MPa). Nilai MoE: 22 cm (1.545 MPa), 24 cm (1.098 MPa), 26 cm (1.140 MPa), 28 cm (1.335 MPa), 30 cm (940 MPa). Balok tinggi 24 cm menunjukkan MoR tertinggi (6,70 MPa).Secara keseluruhan, variasi tinggi 24 cm memberikan performa terbaik dengan kekuatan lentur optimal. Kombinasi blockboard-mahoni menunjukkan potensi sebagai alternatif material konstruksi ekonomis.