Garuda - Garba Rujukan Digital

EVALUASI SEISMIK GEDUNG PERKULIAHAN 3 DAN 6 LANTAI EKSISTING DI KOTA YOGYAKARTA Septhia Irawati, Inggar; Heriawati, Isnaini; Setiawan, Angga Fajar
Jurnal Teknik Sipil Vol. 18 No. 1 (2024)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v18i1.10168

The three-story reinforced concrete building as a college building was built in the city of Yogyakarta in 2011. The building was originally designed to have 6 floors using SNI 1726-2002 and SNI 2847-2002. With the development of construction standards in Indonesia, both regulations have been updated to SNI 1726-2019 and SNI 2847-2019. As a consequence of the updated regulations, re-evaluation of building structures against earthquake loads is important to do. This study aims to evaluate the performance of the existing building structure. The buildings are analyzed under two scenarios: the existing three-story condition and the planned six-story construction according to the Detailed Engineering Design (DED). The analysis employs a nonlinear static procedure based on ASCE 41-23 standards, with seismic load distribution derived from the Indonesian Earthquake Hazard Deaggregation Map. The seismic loading considers two levels of seismic hazard: BSE-1E and BSE-2E. Results indicate that both the three-story and six-story buildings fail to meet the performance criteria stipulated in ASCE 41-23. The evaluation results show that neither the three-story nor the six-story building achieves the Immediate Occupancy (IO) performance level under design earthquake BSE-1E, nor do they meet the Life Safety (LS) performance level under earthquake BSE-2E. Additionally, neither structure meets the maximum allowable horizontal displacement requirements.

A Cyclic Behavior of Multidirectional Box-Shaped Shearing Damper: Experimental Study Setiawan, Angga Fajar; Awaludin, Ali; Satyarno, Iman; Md Nor, Noorsuhada; Haroki, Yusuf; Darmawan, M. Fauzi; Purnomo, Sidiq; Sumartono, Ignatius Harry
Journal of the Civil Engineering Forum Vol. 11 No. 2 (May 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.14550

This paper discusses an experimental study investigating the behavior of the multidirectional box-shaped shearing damper (MBSD) proposed for a bridge structures application. The MBSD consisted of a box-shaped steel plate hot coil (SPHC) material with an effective dimension of 100 x100 mm2 designed to dissipate earthquake excitation energy under combined resultant from longitudinal and transversal directions. The specimens varied with two different web slendernesses, i.e., 58.8 and 27.0. Furthermore, to investigate the different load direction effects, four different loading angles with respect to one of the web planes, i.e., 0°, 15°, 30°, and 45° to be implemented. The specimens were subjected to cyclic loading according to AISC/ANSI 341-22. In the experiment, the shear yield strength, ultimate state behavior, and energy dissipation achievement were evaluated. The result was that MBSD could achieve shear strength and sufficient energy dissipation under different angles of loading direction ranging from yielding to ultimate deformation state. The yielding and ultimate characteristics of MBSD were coincident with the ordinary shear panel damper. A stockier web resulted in a more stable stiffness after the yield point and less buckling of the web but also a slightly earlier strength degradation due to the earlier fracture damage to the welded joint. Finally, the MBSD device had visibility for application on bridge structure as a seismic device by considering appropriate strength and deformation capacity compatibility adjustment with the ultimate displacement limit of 0.11 rad drift angle. In addition, the recommendation for using a better elongation capacity steel material and less welding assembly will improve the behavior and seismic performance of the MBSD.

EVALUASI SEISMIK GEDUNG PERKULIAHAN 3 DAN 6 LANTAI EKSISTING DI KOTA YOGYAKARTA Septhia Irawati, Inggar; Heriawati, Isnaini; Setiawan, Angga Fajar
Jurnal Teknik Sipil Vol. 18 No. 1 (2024)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jts.v18i1.10168

The three-story reinforced concrete building as a college building was built in the city of Yogyakarta in 2011. The building was originally designed to have 6 floors using SNI 1726-2002 and SNI 2847-2002. With the development of construction standards in Indonesia, both regulations have been updated to SNI 1726-2019 and SNI 2847-2019. As a consequence of the updated regulations, re-evaluation of building structures against earthquake loads is important to do. This study aims to evaluate the performance of the existing building structure. The buildings are analyzed under two scenarios: the existing three-story condition and the planned six-story construction according to the Detailed Engineering Design (DED). The analysis employs a nonlinear static procedure based on ASCE 41-23 standards, with seismic load distribution derived from the Indonesian Earthquake Hazard Deaggregation Map. The seismic loading considers two levels of seismic hazard: BSE-1E and BSE-2E. Results indicate that both the three-story and six-story buildings fail to meet the performance criteria stipulated in ASCE 41-23. The evaluation results show that neither the three-story nor the six-story building achieves the Immediate Occupancy (IO) performance level under design earthquake BSE-1E, nor do they meet the Life Safety (LS) performance level under earthquake BSE-2E. Additionally, neither structure meets the maximum allowable horizontal displacement requirements.

Numerical Simulation of RC Beam-Column Joint: Influence of Discrete Crack Modeling on Hysteresis Response Brihaspati, Brihaspati; Saputra, Ashar; Setiawan, Angga Fajar
ASTONJADRO Vol. 14 No. 4 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i4.19246

Understanding the hysteresis behavior of reinforced concrete (RC) beam-column joints with monolithic slabs under cyclic loading is essential for assessing seismic performance. Finite element analysis (FEA) provides a powerful tool for such studies, but accurately capturing cyclic response remains challenging. This research aims to develop and validate an FEA model that provides the hysteresis behavior of an RC beam-column joint focusing on material modeling approaches and emphasizing the influence of discrete crack modeling in simulating major crack opening and closure. The numerical model is implemented in ABAQUS/Standard, combining the Concrete Damaged Plasticity (CDP) model for concrete, combined hardening for reinforcement, and discrete crack representation to enhance crack behavior simulation. The model is validated against previous experimental results by Durrani & Zerbe (1987) under the same cyclic loading protocol. The results show that least one discrete crack significantly enhances the agreement between numerical and experimental hysteresis loops, while two discrete cracks provide the best match for capturing pinching effect and cyclic stiffness degradation. The compression stiffness recovery parameter (wc) in CDP and the combined hardening model for reinforcement also play critical roles in influencing numerical results. The model successfully reproduces cyclic stiffness degradation and energy dissipation, although minor discrepancies exist due to material data limitations. This study advances numerical modeling of RC beam-column joints under cyclic loading, emphasizing the importance of discrete crack modeling in enhancing simulation accuracy for seismic performance assessment.

Seismic Performance Evaluation of Simple Reinforced Masonry Houses with Brick Walls: Experimental and Numerical Approaches Pasya, Namira Risza; Saputra, Ashar; Setiawan, Angga Fajar; Priyosulistyo, Henricus
ASTONJADRO Vol. 14 No. 4 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i4.19253

This study aims to evaluate the performance of brick houses against earthquakes through experimental and numerical approaches. The research objects include two single-story houses located at University of Gadjah Mada (UGM) and Turi, Sleman, Yogyakarta. Microtremor measurement was carried out using accelerometers to record building vibrations, which were then analyzed using Fast Fourier Transform (FFT) to obtain the natural frequency on site of the structure. Numerical modeling was carried out using finite element analysis to validate and asses the building’s frequency response to earthquake loads based on Service Level Earthquake (SLE), Design Basis Earthquake (DBE), and Maximum Considered Earthquake (MCE). The results of the study indicate that the modeling can be validated based on the natural frequency approach from field and numerical evaluate. The maximum displacement that occured at the SLE, DBE, and MCE levels exceeded the allowable limits, indicating that both houses are in an unsafe condition. The structural performance evaluation based on Federal Emergency Management Agency (FEMA 356) shows that the houses in UGM and Turi fall into the Collapse Prevention (CP) category, which mean that the building can no longer be used as houses on the verge of collapse. Although the maximum acceleration analysis of the houses indicates that the values are lower than the design peak ground acceleration (PGAM), structural failure may still occur. The results of this study are expected to provide insights into earthquake-resistant house design as well as recommendations for improving structural resistance to seismic load.

Title

Found 5 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 5 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 5 Documents
Search