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Muhammad Iqbal
Universitas Jenderal Achmad Yani
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Kajian Penggunaan Profil Pultruded Fiber Reinforced Polymer untuk Jembatan Pejalan Kaki Muhammad Iqbal
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 21 No 2 (2022): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol21no2.487

Abstract

The interest in composite materials has increased significantly due to their high strength to weight ratio. Utilization of FRP as construction material is not yet popular in Indonesia as it’s generally used for strengthening structural elements. This study aims to provide a design overview of a hypothetical hollow square profile 150.130.10 on a single span bridge with 12, 16, 20 and 24 meters span length variations. The method refers to the AASHTO design criteria in the form of deflection, vibration, and component allowable stress. The results show that all design criteria on a 12 meters span are fulfilled. Due to insufficient bridge stiffness in 20 and 24 meters span, the vertical fundamental frequency is 4.33 Hz and 3.3 Hz respectively, thus the requirements (> 5Hz) are not fulfilled. In addition, the  FRP profile weak axis critical compressive capacity (68.95 kN) cannot withstand the critical load at spans of 16, 20 and 24 meters (respectively: 97.91 kN; 144.39 kN; 185.36 kN). This study shows that dynamic responses and material characteristics are two factors that may determine pedestrian FRP bridges design.
Analisis Kekuatan Struktur Pasca Retrofitting pada Kerusakan Struktur Balok Beton Bertulang Luluk Kristanto; Sumargo; Muhammad Iqbal
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 1 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no1.502

Abstract

The provisions exceed of crack and deflection problems, causing retrofit as best alternative methods more than the conventional. This experimental research determines damage parameters, FRP StrongGlass E450 retrofits design capacity and the behavior of reinforced concrete beams post-retrofitting. Hammer Test results for existing beams with hlap (270 mm) < hmin (286 mm), the minimum concrete quality K.408 not reflecting beam ductile behavior that exceed of allowable cracked and deflection conditions. It has not yet caused collapse, where the tensile test results with fy average 348,47 MPa and fu average 491,32 MPa still exceed the minimum strength, so the BjTP 12 installed contributes maximum for beam ductility. The similarity field deflection values with theoretical analysis and SAP 2000, made SAP 2000 modeling as FRP design, where 1 layer StrongGlass E450, 200 mm wide along 3 beams object, fulfilling flexural strength requirements, shear strength and deflection. Loading test post with sand weighing 4200 Kg (increased 25,98%) in 3 stages, the tensile strength increased 23,879% (117,325 MPa) and strain max. 0,00154 indicates the beam before yielded. Post-density injection could be affects beam stiffness on deflection, pre-retrofit P1 (-34 mm) and P2 (-37 mm), and post-retrofit P1 (-30,8 mm) and P2 (-34,2 mm).
Co-Authors Luluk Kristanto Sumargo