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All Journal Jurnal Teknik ITS Jurnal IPTEK Journal of Civil Engineering Civil Engineering Dimension Jurnal Aplikasi Teknik Sipil G-Tech : Jurnal Teknologi Terapan Jurnal Teknik Sipil Advance Sustainable Science, Engineering and Technology (ASSET)
Habieb, Ahmad Basshofi
Civil Engineering Department, Institut Teknologi Sepuluh Nopember
Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Finite element analyses on a small masonry house prototype retrofitted using frp strips Ahmad Basshofi Habieb; Marco Valente; Gabriele Milani
Journal of Civil Engineering Vol. 35 No. 2 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i2.7410

Abstract

This study presents a series of finite element analyses on the prototype of masonry house retrofitted using FRP strips.The model of the masonry house refers to the prototype scaled to 1:3 tested in an experimental campaign. The non-linear behaviorof masonry is modeled through the Concrete Damage Plasticity (CDP) model, while the FRP and adhesive are modeled as twoseparated isotropic solid materials with elastic-plastic behavior. A good agreement between experimental and numerical resultis obtained, indicating the increase of bearing capacity of the reinforced masonry prototype.
Seismic Performance Enhancement of a Reinforced Concrete Building Using an RB-HDRC Base Isolation System Nur Khofifah; Ahmad Basshofi Habieb
G-Tech: Jurnal Teknologi Terapan Vol 10 No 2 (2026): G-Tech, Vol. 10 No. 2 April 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i2.9398

Abstract

This study investigates the seismic performance enhancement of a four-story reinforced concrete building retrofitted with a Rubber Bearing-High Damping Rubber Core (RB-HDRC) base isolation system. A three-dimensional numerical model was developed and subjected to nonlinear time-history analysis under two design earthquake levesl (BSE 1-E and BSE 2-E). The results indicate that the base isolation system significantly reduces seismic demands compared to the fixed-base condition. Peak base shear was reduced by approximately 48% at the BSE-1E level and by 52% at the BSE-2E level. Roof acceleration decreased by about 76% and 79% at the BSE 1-E and BSE 2-E levels, respectively. The maximum interstory drift ratio was also reduced, demonstrating improved deformation control in the isolated system. Furthermore, the number of plastic hinges decreased significantly, while the energy dissipation capacity increased due to the hysteretic behavior of the RB-HDRC isolator. These findings demonstrate that RB-HDRC base isolation effectively enhances structural resilience and represents a promising strategy for improving the seismic performance of reinforced concrete buildings.
An Experimental Study on Axial Stress-Strain Behaviour of FRP-Confined Square Lightweight Aggregate Concrete Columns Butje Alfonsius Louk Fanggi; Budi Suswanto; Yuyun Tajunnisa; Jusuf Wilson Meynerd Rafael; Jonatan Lassa; Ahmad Basshofi Habieb
Advance Sustainable Science Engineering and Technology Vol. 7 No. 1 (2025): November-January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i1.865

Abstract

This article presents the results of a research project that aimed to evaluate how the number of fiber-reinforced polymer (FRP) layers and the compressive strength of concrete affect the stress-strain behaviors of concrete columns produced from artificial lightweight aggregate with square cross-sectional shapes. Eighteen test specimens were manufactured and wrapped with glass fiber-reinforced polymer (GFRP) material. The specimens were later subjected to concentric compression for experimental evaluation. The experimental results suggest that GFRP efficiently confines square lightweight aggregate concrete columns. Furthermore, the test results indicate that adding FRP layers augments the ultimate stress and strain. Finally, the results suggest that an increase in the compressive strength of concrete leads to a corresponding increase in the ultimate stress. On the other hand, it has been observed that the ultimate strain decreases as compressive strength increases. The research findings reveal the behaviour of FRP-confined square lightweight aggregate concrete columns, which may also be utilized to formulate a new design-oriented model for these columns.
Co-Authors Aini, Khusniatul Axel Ricardo Santoso Budi Suswanto Butje Alfonsius Louk Fanggi Data Iranata Dita Kamarul Fitriyah Djoko Irawan Faimun, Faimun Firmansyah, Muhammad Farhan Gabriele Milani Ghifari, Fikri Habibillah Asyari, Yudhistira Hapsari, Roro Prasti Heppy Kristijanto Hidajat Sugihardjo Hidajat Sugihardjo Hidajat Sugihardjo Hidayat, Muhammad Rifat I Gusti Putu Raka Ifarrel Rachmanda Hariyanto Irawan, Djoko Jonatan Lassa Jusuf Wilson Meynerd Rafael Kristijanto, Heppy Louk Fanggi, Butje Alfonsius Mahendra, Zein Farid Vicky Mahzumah, Cindy Marco Valente Meynerd Rafael, Jusuf Wilson Moh. Fadhlan Rosyidi Muhamad Fauzan Akbari Nur Khofifah Priyo Suprobo Rijiyawanto, Adetya Sianipar, Koresy Kevin Hamonangan Sitorus, Sinar Nathalia Soegihardjo, Hidajat Sugihardjo, Hidajat Sutrisno, Wahyuniarih Sutrisno, Wahyuniarsih Syifaul Ummah, Galih Yuyun Tajunnisa