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Journal : International Journal of Architecture and Urbanism

Analysis of Earthquake-Resistant Portal Frame Structures with Ordinary Moment Frames (OMF), Intermediate Moment Frames (IMF), and Special Moment Frames (SMF) based on SNI 1726:2019 Juni Indriani; Johannes Tarigan
International Journal of Architecture and Urbanism Vol. 7 No. 1 (2023): International Journal of Architecture and Urbanism
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.96 KB) | DOI: 10.32734/ijau.v7i1.11687

Abstract

Since the 19th century, portal frames have been used to build industrial buildings because the development process is fast, economical, and efficient. This research aims to look at the cross-section of structural elements in BS 5950-1:2000 spans of 15 m and 40 m using SNI 1726:2019 with modal analysis, including horizontal deflection and stress ratio, using LRFD and ASD methods. Then, the structure was revised to be safe against earthquakes researched in three zones, including low (OMF), medium (IMF), and high (SMF) earthquakes. The results of this research show that the horizontal deflection's magnitude still falls within the allowable limit, with the maximum value on Tarutung, the SMF system, and KDS E on a 15-m span of 43.828 mm and a 40-m span of 68.703 mm. However, several of the IMF and SMF systems' cross-sectional structures exceeded the stress ratio capacity. After revision, the percentage ratios of the maximum structural weight using cross-sections on the Indonesian market using two methods and three frame systems with spans of 15 m and 40 m are 16.050% and 17.240%, respectively. The obtained maximum structural weight exceeds the cross-sections of the British standard before revision by 13.935% and 13.187%. It is an SMF system.
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.