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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Teknik Sipil Semesta Teknika Civil Engineering Journal Astonjadro Jurnal TAMBORA JURNAL SAINTIS Jurnal Nuansa Akademik: Jurnal Pembangunan Masyarakat Jurnal Ilmiah Multidisiplin Indonesia ASEAN Natural Disaster Mitigation and Education Journal
Ashar Saputra
Universitas Gajah Mada
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Journal : Astonjadro

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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

Abstract

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

Abstract

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.
Co-Authors Adityawan, Muh. Handy Dwi Agus Darmawan Adi Andreas Triwiyono Arianto, Niky Brihaspati, Brihaspati Firman Syarif Gabriella Agnes Luvena, Gabriella Agnes Hariyanto, Gatot Henricus Priyosulistyo, Henricus Hermansyah Hermansyah Iman Satyarno M.Fauzie Siswanto, M.Fauzie Muhammad, Heidi Nurokhman, Nurokhman Pasya, Namira Risza Pratama, Hamdi Y. Putra, Whelly T. Putri, Andini Pratiwi Richo Andi Wibowo Rimindubby, Vriska D.S Satmoko, Tranggono Aji Setiawan, Angga F. Setiawan, Angga Fajar Siswanto, Muhammad Fauzie Suprapto Siswosukarto