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Journal : International Journal of Architecture and Urbanism

Analysis of SCWB Ratio on Collapse Probability of SRPMK Concrete Structures Lubis, Syarbaini; Tarigan, Johannes; Nursyamsi, Nursyamsi
International Journal of Architecture and Urbanism Vol. 8 No. 3 (2024): International Journal of Architecture and Urbanism
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijau.v8i3.18210

Abstract

The Bank Indonesia Medan Office, built in 1907, is an example of an old building requiring seismic resilience evaluation. This article investigates the impact of the Strong Column-Weak Beam (SCWB) ratio on the collapse probability of SRPMK concrete structures using spectrum response and linear time history analyses. Ground motions from Niigata (Mw 6.63), Tohoku (Mw 9.12), and Miyagi (Mw 7.15) earthquakes were utilized. Findings indicate that the existing structure does not meet seismic resilience standards per SNI 1726:2019 and SNI 2847:2019. Structural modifications are necessary with an SCWB ratio of 1.2 to ensure adequate seismic resistance. The analysis reveals that the largest inter storey drift and displacement occur during the Niigata earthquake, while the maximum base shear is recorded in spectrum response analysis. Performance evaluation of the structure shows that the collapse probability remains within the Immediate Occupancy (IO) level. This article underscores the critical role of the SCWB ratio in determining collapse probability and provides recommendations for structural design improvements.
Study on the Effect of Variation in Number of Panels on Natural Frequency Chairuman, Zaki; Tarigan, Johannes; Nursyamsi, Nursyamsi
International Journal of Architecture and Urbanism Vol. 8 No. 3 (2024): International Journal of Architecture and Urbanism
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijau.v8i3.18231

Abstract

This study investigates the effect of varying the number of panels on the natural frequency and mode shape of truss bridges. Using a steel frame bridge as a case study, three different panel configurations (8, 10, and 12 panels) were analyzed through the Damped-DOF System and ABAQUS software. The results show that bridges with fewer panels exhibit lower natural frequencies, while those with more panels have higher frequencies due to increased stiffness. Furthermore, the mode shape analysis indicates that bridges with fewer panels experience greater deformations, potentially impacting their dynamic performance. This research emphasizes the importance of optimizing the number of panels in bridge design to enhance both stiffness and dynamic force resistance. Future research may explore the influence of other structural parameters on natural frequency and mode shape.