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Made Hendra Prayoga
Udayana University
Civil Engineering, Building, Construction & Architecture

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DESIGN METHOD FOR STRONG COLUMNS-WEAK BEAMS FOR RISK CATEGORY IV BUILDINGS WITH TIME HISTORY PERFORMANCE ANALYSIS P Adi Yasa; Made Hendra Prayoga; Ida Bagus Prastha Bhisama
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 1 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 1, Maret 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i01.p06

Abstract

Collapse pattern that considers the design of strong columns-weak beams in structures located in areas prone to large earthquakes such as Indonesia is an important thing that must be considered. When a large earthquake occurs in buildings with risk category IV based on SNI 1726-2019, the flexible parts of the beam elements are allowed to experience damage, while the columns must not experience soft-story mechanisms. To obtain a more realistic picture of it, in this study Nonlinear Time History Analysis (NLTHA) was chosen because it is considered able to provide a picture of the structural behavior that is closer to reality than Pushover Analysis. The results of the 2D time history performance analysis indicate that a beam-column capacity ratio of 1.2, as specified in SNI 2847-2019, renders the structure unable to achieve the expected collapse performance. By using a trial-and-error process to obtain a safe collapse hierarchy, an increase in column capacity of 2 to 3 times the SNI 2847-2019 column design is obtained. Based on this, in designing structures with risk category IV, apart from having to meet the terms and conditions of SNI the structure also needs to be analyzed for its performance using a more realistic methods such as NLTHA (portal) or 3D to ascertain whether the planned failure pattern can occur or not. This is important considering that the beam column capacity ratio in SNI is not sufficient to reach the Collapse Prevention (CP) condition of 95%.
STRUCTURAL REDESIGN FOR MATERIAL EFFICIENCY (CASE STUDY: BUILDING A OF KIARA BEACH FRONT APARTMENT) Made Hendra Prayoga; Ida Bagus Prastha Bhisama; P. Adi Yasa
Jurnal Ilmiah Teknik Sipil Vol. 30 No. 1 (2026): Vol. 30 No. 1 (2026): Jurnal Ilmiah Teknik Sipil
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2026.v30.i01.p09

Abstract

Structural design for multistory buildings must satisfy not only strength and safety requirements but also material efficiency to achieve cost-effective construction. This study aims to redesign the structural system of Building A of the Kiara Beach Front Apartment to obtain a more efficient design while maintaining structural performance and safety. The redesign was carried out using the Special Moment Resisting Frame (SMRF) system in accordance with the provisions of SNI 1726:2019, SNI 1727:2020, and SNI 2847:2019. A three-dimensional structural model was developed in SAP2000, followed by analyses of gravity and seismic loads, inter-story drift, structural irregularities, and the design of beams, columns, slabs, and foundations. The results indicate that the redesigned structure satisfies seismic performance requirements, with the fundamental period and inter-story drift remaining within the allowable limits specified by the applicable standards. Furthermore, the optimization of structural member dimensions and reinforcement improved material efficiency in the first-floor structural elements, resulting in an 11% reduction in concrete volume and a 23% reduction in reinforcement weight. Consequently, a more economical structural design was achieved without compromising structural safety requirements.
DESIGN METHOD FOR STRONG COLUMNS-WEAK BEAMS FOR RISK CATEGORY IV BUILDINGS WITH TIME HISTORY PERFORMANCE ANALYSIS P Adi Yasa; Made Hendra Prayoga; Ida Bagus Prastha Bhisama
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 1 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 1, Maret 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i01.p06

Abstract

Collapse pattern that considers the design of strong columns-weak beams in structures located in areas prone to large earthquakes such as Indonesia is an important thing that must be considered. When a large earthquake occurs in buildings with risk category IV based on SNI 1726-2019, the flexible parts of the beam elements are allowed to experience damage, while the columns must not experience soft-story mechanisms. To obtain a more realistic picture of it, in this study Nonlinear Time History Analysis (NLTHA) was chosen because it is considered able to provide a picture of the structural behavior that is closer to reality than Pushover Analysis. The results of the 2D time history performance analysis indicate that a beam-column capacity ratio of 1.2, as specified in SNI 2847-2019, renders the structure unable to achieve the expected collapse performance. By using a trial-and-error process to obtain a safe collapse hierarchy, an increase in column capacity of 2 to 3 times the SNI 2847-2019 column design is obtained. Based on this, in designing structures with risk category IV, apart from having to meet the terms and conditions of SNI the structure also needs to be analyzed for its performance using a more realistic methods such as NLTHA (portal) or 3D to ascertain whether the planned failure pattern can occur or not. This is important considering that the beam column capacity ratio in SNI is not sufficient to reach the Collapse Prevention (CP) condition of 95%.
STRUCTURAL REDESIGN FOR MATERIAL EFFICIENCY (CASE STUDY: BUILDING A OF KIARA BEACH FRONT APARTMENT) Made Hendra Prayoga; Ida Bagus Prastha Bhisama; P. Adi Yasa
Jurnal Ilmiah Teknik Sipil Vol. 30 No. 1 (2026): Vol. 30 No. 1 (2026): Jurnal Ilmiah Teknik Sipil
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2026.v30.i01.p09

Abstract

Structural design for multistory buildings must satisfy not only strength and safety requirements but also material efficiency to achieve cost-effective construction. This study aims to redesign the structural system of Building A of the Kiara Beach Front Apartment to obtain a more efficient design while maintaining structural performance and safety. The redesign was carried out using the Special Moment Resisting Frame (SMRF) system in accordance with the provisions of SNI 1726:2019, SNI 1727:2020, and SNI 2847:2019. A three-dimensional structural model was developed in SAP2000, followed by analyses of gravity and seismic loads, inter-story drift, structural irregularities, and the design of beams, columns, slabs, and foundations. The results indicate that the redesigned structure satisfies seismic performance requirements, with the fundamental period and inter-story drift remaining within the allowable limits specified by the applicable standards. Furthermore, the optimization of structural member dimensions and reinforcement improved material efficiency in the first-floor structural elements, resulting in an 11% reduction in concrete volume and a 23% reduction in reinforcement weight. Consequently, a more economical structural design was achieved without compromising structural safety requirements.
Co-Authors Ida Bagus Prastha Bhisama P Adi Yasa P. Adi Yasa