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All Journal Jurnal Applied Science in Civil Engineering Jurnal Sains dan Teknologi
Fajri Yusmar
Departemen Teknik Sipil, Fakultas Teknik, Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Chemistry Civil Engineering, Building, Construction & Architecture Education Physics Transportation

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Perencanaan Struktur Jembatan Gantung Ateh Koto pada Nagari Sungai Rimbang Kecamatan Suliki Kabupaten Lima Puluh Kota 'Abdan Syakuro; Fajri Yusmar; Annisa Prita Melinda; Putri Fauziahtul Asri
Jurnal Sains Dan Teknologi | E-ISSN : 3063-9980 Vol. 3 No. 1 (2026): Juli - September
Publisher : GLOBAL SCIENTS PUBLISHER

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Abstract

The hilly topography of Suliki District, crossed by several rivers, makes bridges a vital infrastructure for community mobility and economic activity, particularly in Nagari Sungai Rimbang. The Ateh Koto suspension bridge in this nagari was damaged by the flooding of the Batang Sinamar River in November 2025, which caused foundation scouring and bank erosion on both abutment sides, altering the bridge span and rendering the structure unsafe for use. This study aims to design a new 50-meter suspension bridge structure that is safe and complies with applicable technical standards. The design was carried out based on topographic and hydrological survey data, with load analysis referring to SNI 1725:2016 and Circular Letter of the Minister of PUPR No. 02/SE/M/2010. The Flood Water Level was determined through hydrological analysis (Log Pearson III method) and hydraulic analysis (Manning's equation), while structural modeling was performed using SAP2000 software to obtain internal forces, stresses, deflections, and dynamic responses of the main cable, hangers, towers, backstay cables, and girders. The results show a 25-year design flood discharge of 328.17 m³/s with a flood water level rise of 2.25 m above normal water level. All upper structure elements satisfy strength requirements with stress ratios below 1.0, maximum deflection of 0.18 m remains below the 0.25 m allowable limit, and the structure's natural frequency of 0.233 Hz lies outside the resonance danger zone (0.5–1.2 Hz), confirming the design is structurally safe and feasible to restore accessibility for the community of Nagari Sungai Rimbang.
OPTIMALISASI KINERJA MEKANIS BATA MERAH MELALUI MODIFIKASI SERAT POLIPROPILENA: STUDI EKSPERIMENTAL PADA MATERIAL KONSTRUKSI TRADISIONAL Afrinaldi Hidayat; Nevy Sandra; Fajri Yusmar
Jurnal Applied Science in Civil Engineering Vol. 6 No. 4 (2025): Jurnal Applied Science in Civil Engineering
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/s5z9cv14

Abstract

Bata merah merupakan material konstruksi fundamental yang masih mendominasi industri bangunan Indonesia dengan pangsa pasar mencapai 65% untuk konstruksi perumahan. Namun, variabilitas kualitas yang tinggi dan kuat tekan yang sering di bawah standar menjadi tantangan utama dalam aplikasi struktural. Penelitian ini bertujuan menganalisis efektivitas penambahan serat polipropilena dalam meningkatkan karakteristik mekanis bata merah, khususnya kuat tekan, serta menentukan komposisi optimal untuk aplikasi praktis. Dilakukan penelitian eksperimental dengan lima variasi dosis serat polipropilena (0%, 0,5%, 1%, 1,5%, dan 2% dari berat tanah liat kering) menggunakan tanah liat dari Kabupaten Padang Pariaman. Parameter yang diuji meliputi kuat tekan, daya serap air, dan berat jenis dengan masing-masing 10 sampel per variasi. Penambahan serat polipropilena 0,5% menghasilkan peningkatan kuat tekan optimal sebesar 32,88% dibandingkan bata kontrol (dari 476,67 Kgf menjadi 633,33 Kgf). Namun, penambahan di atas dosis tersebut justru menurunkan kuat tekan secara bertahap. Daya serap air mengalami peningkatan dari 23,54% (kontrol) menjadi 32,16% (dosis 2%), sementara berat jenis menurun dari 4,25 g/cm³ menjadi 3,11 g/cm³. Modifikasi bata merah dengan serat polipropilena terbukti efektif meningkatkan kinerja mekanis pada dosis optimal 0,5%. Penelitian ini memberikan kontribusi signifikan terhadap pengembangan material konstruksi tradisional yang lebih berkualitas dan kompetitif.
Co-Authors 'Abdan Syakuro Afrinaldi Hidayat Annisa Prita Melinda Nevy Sandra Putri Fauziahtul Asri