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Journal : Journal of Local Architecture and Civil Engineering

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.
Perbandingan Tulangan Kolom dan Deformasi Struktur Gedung Alamsyah, Syahrul; Setiawan, Wira; Apriansyah, Muh; Zulfikar, M. Deta; Syaputri, Sulis; Fikar, M. Ziaul
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.v4i1.230

Abstract

The Moment-Resisting Frame System (MRFS) equipped with shear walls shows a significant increase in structural stiffness compared to systems without shear walls. The results of the inter-storey drift analysis confirm that the presence of shear walls reduces the horizontal deformation of the building, thereby increasing lateral stability. In addition, the use of shear walls contributes to the efficiency of reinforcement requirements, as seen in the column reinforcement ratio of 3%, which is lower than that of structures without shear walls, which reaches 5%. Although the mass of the structure with shear walls is greater, namely 4747.96 kN compared to 3853.08 kN in structures without shear walls, this system still offers advantages in terms of more efficient use of main reinforcement. Overall, the integration of shear walls in the frame system provides better structural performance through increased stiffness, reduced deflection, and optimised reinforcement requirements.