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UTILIZATION OF RAINWATER TO REDUCE WATER RUNOFF DISCHARGE IN THE KELAPA GADING PUMP BUILDING AREA USING THE SUNJOTO METHOD Mohammad Imamuddin; Basit Al Hanif; Afinda Deja Yuliansyah
International Journal of Civil Engineering and Infrastructure Vol. 3 No. 1 (2023): IJCEI Volume 3 No. 1
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.1.1.40-52

Abstract

Increased development of community facilities triggers changes in land use that result in less open land for infiltration. This causes run-off and little rainwater is absorbed by the soil. For this reason, it is necessary to make a reservoir in the form of an infiltration well that functions to accommodate and absorb rainwater into the ground slowly. The purpose of this study was to determine the number and point of infiltration wells. The research was conducted at the Kelapa Gading Pumping Building located in North Jakarta. The address of the registered entity is Jl. Gading Mas Timur I No. 17, RT.12 / RW.10, Pegangsaan Dua Village, Kelapa Gading District, North Jakarta City, where the Kelapa Gading Pump Building stands on an area of ± 4,000 m2, has a reservoir with an area of ± 1,955 m2 with supporting buildings in the form: 1. pump building of 160 m2, 2. substation house of 35 m2, 3. transformer house of 75 m2, 4. employee mess of 52 m2, 5. generator house of 75 m2. This research uses survey methods in the form of measurements, interviews, and to obtain the required data. Based on the data and calculation analysis according to SNI 846-2017, a circular infiltration well with a diameter of 1meter and a depth of 2 meters to 2.5 meters can be determined.
THE EFFECT OF BRIDGE’S PIER HEIGHT TO THE BEHAVIOR OF GROUP BORED PILE FOUNDATION DUE TO PUSHOVER ANALYSIS Basit Al Hanif
International Journal of Civil Engineering and Infrastructure Vol. 3 No. 1 (2023): IJCEI Volume 3 No. 1
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.1.1.1-10

Abstract

This study examines the behavior of pile foundations in relation to pier height as a result of pushover load analysis. The pier column was elevated in this investigation with fixed stiffness (EI) and by altering the EI value. A pushover analysis is performed on the bridge structure using the preset variables, and the behavior of the bored pile group foundation is examined owing to the pushover load. The bridge structure is analyzed using the Midas Civil Program, and the piling foundation response is analyzed using the FB-Multipier Program. By keeping the EI value constant at each height, the resulting pier pile base shear force diminishes with height. Meanwhile, by adjusting the EI stiffness value, the base shear force is kept roughly constant at each height. The fixed value of the EI stiffness has no effect on the depth of fixity. Meanwhile, varying the EI stiffness changes the pile foundation's depth of fixity.
NUMERICAL INVESTIGATION OF COLD-FORMED STEEL HOLLOW STRUCTURAL SECTIONS DUE TO COMBINED AXIAL COMPRESSION AND BENDING LOADS Budiman Budiman; Mohammad Imamuddin; Basit Al Hanif; Hendras Duwi Handoyo
International Journal of Civil Engineering and Infrastructure Vol. 3 No. 2 (2023): IJCEI Volume 3 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.3.2.69-77

Abstract

old-formed steel has emerged as a prominent material in modern construction due to its excellent structural performance, cost-effectiveness, and sustainability. Hollow structural sections made of cold-formed steel have garnered significant attention due to their favourable strength-to-weight ratios and versatility in construction applications. In this research, the cross-section of cold-formed steel hollow structural sections will be analysed as a structure that receives a combination of compressive and bending loads. Numerical analysis was carried out using the finite element method with the help of ABAQUS software to obtain the buckling behaviour and cross-sectional capacity. The cold rolled steel regulations in SNI 79712013 or AS/NZS 4600 will be compared with numerical results to see the level of performance of the code in the case of hollow structural sections. Numerical testing and cross-sectional capacity calculations refer to existing references in the literature.
STRUCTURAL BEHAVIOR AND PERFORMANCE OF HOT-ROLLED WIDE FLANGE CASTELLATED STEEL BEAMS: INSIGHTS FROM FINITE ELEMENT ANALYSIS Cipto Wahyu; budiman budiman; Basit Al Hanif
International Journal of Civil Engineering and Infrastructure Vol. 5 No. 2 (2025): IJCEI Volume 5 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.5.2.58-67

Abstract

Castellated steel beams, produced by cutting solid cross-sections, enhance the moment of inertia without increasing self-weight but remain vulnerable to lateral–torsional buckling (LTB) and Vierendeel action. This study investigates the nonlinear behavior of IWF 200×100×5.5×9 beams with spans of 8–10 meters using ABAQUS and the modified Riks algorithm. Results reveal that LTB is the governing failure mode, consistent with AISC 360 predictions. Circular web openings provide 2–7% higher ultimate capacity at short spans, though their performance aligns with hexagonal openings for longer spans. Hexagonal openings, however, reduce deflections by 15–20%, indicating improved serviceability. Strengthening strategies are proposed, including stiffeners, lateral bracing, partial closure of web openings near supports, and optimization of opening ratios between 50–70%, achieving an effective balance between strength and deflection control. The findings highlight the critical influence of opening geometry and span on structural performance and provide actionable guidance for the design and optimization of castellated steel beams. This work advances understanding of perforated steel behavior under bending and offers practical solutions for enhancing both ultimate capacity and serviceability in engineering applications.Keywords: Castellated steel beams, nonlinear analysis, lateral–torsional buckling, ABAQUS, structural optimization