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Septhia Irawati, Inggar
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering Transportation

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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

Abstract

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.
Simulasi Computational Fluid Dynamics (CFD) untuk Optimalisasi Proses Perekatan pada Oven Bambu Laminasi Bahari, Galuh; Septhia Irawati, Inggar; Aris Hendaryanto, Ignatius; Ayu Putri Pratiwi, Ilham; Krisnaputra, Radhian; Sugiyanto; Wijoyo, Joannes Bimo
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2567

Abstract

The utilization of bamboo in architecture and construction as an eco-friendly alternative to wood is steadily increasing. While ovens are crucial tools in the production of laminated bamboo, particularly for heating during the bonding process, research on ovens specifically designed for bamboo lamination remains scarce. This study aims to optimize the design of laminated bamboo ovens using Computational Fluid Dynamics (CFD) simulations to achieve uniform heat distribution and maximize thermal efficiency. Three design iterations were tested: Iteration 1 with an air velocity of 4 m/s, Iteration 2 with 1.5 m/s, and Iteration 3 with 3 m/s. The results revealed that Iteration 1 exhibited uneven heat distribution, with initial temperatures reaching 1175 K before dropping sharply to 800 K. Iteration 2 showed slower initial heating, achieving a final temperature of 360 K, but heat distribution remained suboptimal. Iteration 3 delivered the best performance, achieving uniform and stable heat distribution near the target temperature of 473 K (200 °C). Overall, Iteration 3 demonstrated the most efficient thermal performance, not only meeting the target temperature with consistent heat distribution but also enhancing the overall heating efficiency of the oven.
Analisis Pengaturan Inverter Terhadap Unjuk Kerja Mesin Planer Bambu V2 Dalam Menghasilkan Serutan Bambu Laminasi Prasta, Silvano Virgio Prasta; Aris Hendaryanto, Ignatius; Basuki, Budi; Krisnaputra, Radhian; Sugiyanto; Septhia Irawati, Inggar
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2009

Abstract

Planer bamboo machine V2 is a machine used to flatten the top and bottom surfaces of bamboo slats. This machine was made to overcome problems with existing machines in the form and long times of drawstring. An inverter is added to set the rotational speed roller. This study analyzes the effect of a combination of the top and bottom cutting speeds on the rotation speed of roller whose rotation speed was set at frequencies of 10, 20, 30, 40, and 50 Hz. The purpose of the study is to determine the effect of inverter frequency settings on the results of bamboo drawstring. Based on the analysis performed, the appropriate combination for the performance planer bamboo machine is by setting the inverter frequency to 20 Hz with a production result in a day of 54,54 slats drawstring with long of slats 2 meters, with a total power consumption of 2,483 kWh in one hour.
Simulasi Computational Fluid Dynamics (CFD) untuk Optimalisasi Proses Perekatan pada Oven Bambu Laminasi Bahari, Galuh; Septhia Irawati, Inggar; Aris Hendaryanto, Ignatius; Ayu Putri Pratiwi, Ilham; Krisnaputra, Radhian; Sugiyanto; Wijoyo, Joannes Bimo
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2567

Abstract

The utilization of bamboo in architecture and construction as an eco-friendly alternative to wood is steadily increasing. While ovens are crucial tools in the production of laminated bamboo, particularly for heating during the bonding process, research on ovens specifically designed for bamboo lamination remains scarce. This study aims to optimize the design of laminated bamboo ovens using Computational Fluid Dynamics (CFD) simulations to achieve uniform heat distribution and maximize thermal efficiency. Three design iterations were tested: Iteration 1 with an air velocity of 4 m/s, Iteration 2 with 1.5 m/s, and Iteration 3 with 3 m/s. The results revealed that Iteration 1 exhibited uneven heat distribution, with initial temperatures reaching 1175 K before dropping sharply to 800 K. Iteration 2 showed slower initial heating, achieving a final temperature of 360 K, but heat distribution remained suboptimal. Iteration 3 delivered the best performance, achieving uniform and stable heat distribution near the target temperature of 473 K (200 °C). Overall, Iteration 3 demonstrated the most efficient thermal performance, not only meeting the target temperature with consistent heat distribution but also enhancing the overall heating efficiency of the oven.
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

Abstract

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.
Co-Authors Ayu Putri Pratiwi, Ilham Bahari, Galuh Budi Basuki, Budi heriawati, isnaini Ignatius Aris Hendaryanto Prasta, Silvano Virgio Prasta Radhian Krisnaputra Setiawan, Angga Fajar SUGIYANTO Wijoyo, Joannes Bimo