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All Journal Jurnal Media Informatika Journal of Local Architecture and Civil Engineering
Winardin, Sofyan
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Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Construction Supply Chain Risk Analysis in Bima junna, isra; asfarina, sharwanda; Fikar, M Ziaul; Winardin, Sofyan; Apriansyah, Muh
Jurnal Media Informatika Vol. 6 No. 1 (2024): Jurnal Media Informatika Edisi September - Desember
Publisher : Lembaga Dongan Dosen

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Abstract

The construction business is a complex business, in terms of time management and budget management. A common problem is construction supply chain management. Risks often occur due to changes in construction models and the wrong choice of supply chain, such as the mobilization of materials from the factory to the project site is often late because it is not well organized. Construction supply chain management is an idea that regulates the supply chain construction cycle by identifying risks that can cause project failure. Risks identified at the construction stage can reduce risks in construction projects. The identified risks are then analyzed using a simulation model so that the right strategy can be given to estimate project delays, especially in terms of time and cost. The purpose of this study is to provide strategic solutions to risky supply chain activities in construction projects. Monte Carlo simulations are carried out using the Microsoft Excel application. Based on the final results of the study, of the thirty risks targeted by the Monte Carlo simulation, four risks are included in the high risk analysis, eleven risks are included in the medium risk analysis, and fifteen risks are included in the low risk analysis. The four risks that are included in the high score are then discussed by the contractor's project manager, especially to understand the risk management strategy. The response to these four risks is to reduce the risk by following the operational standards of construction projects, which include material inspection and work execution, as well as ensuring that the amount of material in the warehouse is not less than 30% so that there is no waiting time in the field.
Perencanaan Struktur I Girder dengan Bentang 30 Meter di Desa Dompu Setiawan, Wira; Winardin, Sofyan; Rahman, M. Deta Zulfikar
Local Engineering Vol. 4 No. 1 (2026): June
Publisher : CV. Gio Architect

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59810/lejlace.v4i1.217

Abstract

The Bridges themselves are classified based on the type of upper structure, one type of bridge upper structure is using prestressed concrete, prestressed concrete is also distinguished based on its cross-sectional profile, namely T, I, T Girder, Box Girder, in this study a comparison was made to see the difference in the upper structure and cost of the bridge with a span of 30.8 meters on the Kandai bridge with the existing upper structure using I Girder and will be compared with T Girder for  obtaining differences in behavior, effectiveness of the structure as well as cost. The research method used is to start by knowing some mass formulationsah, collecting data then planning the load plan for the bridge then modeling on   the SAP2000 software after modeling and getting the force in the next structure analysis to check  the Safety factor  then a cost analysis was carried out and a comparative recap between I and T Girder in the form of differences in the initial condition prestressed force, voltage loss value, service condition pretentension force, final prestressed force and cost presented in the form of a graph. From the results of the calculation analysis, it was concluded that the I Girder is more effective than the T Girder, this is shown by the total volume value of T Girder concrete which is 128,805 m3 and the number of T Girder strands is 355 strands, where the total volume of I Girder concrete is 101,175 m3 and the number of I Girder strands is 235 strands.  This is also evidenced by the I girder safety factor value against the moment, which is 1.141 and against the shear which is 3,59 as needed, compared to the T Girder safety factor against the moment, which is 3,97 and against the shear which is 2.177. The nominal moment produced by the I Girder is 12203,56 kNm and the nominal moment produced by the T Girder is 58221,55 kNm.
Co-Authors Apriansyah, Muh Asfarina, Sharwanda Junna, Isra M. Ziaul Fikar Rahman, M. Deta Zulfikar Wira Setiawan