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All Journal Dinamisia: Jurnal Pengabdian Kepada Masyarakat Journal of the Civil Engineering Forum
Geby Aryo Agista
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Civil Engineering, Building, Construction & Architecture Social Sciences Other

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Seismic and Tsunamis Vulnerability Assessment of the Shelter School Building Structure with and without Retrofitting Fauzan; Zev Al Jauhari; Geby Aryo Agista; Yokota, Atsushi; Masharya Eko Putra
Journal of the Civil Engineering Forum Vol. 11 No. 1 (January 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.13432

Abstract

Understanding the vulnerability of school shelters to tsunamis is crucial for developing effective mitigation strategies and increasing the resilience of coastal communities in the education sector. SDN 02 Sasak Ranah Pasisia, an elementary school in West Pasaman Regency, West Sumatera, Indonesia, had a shelter building constructed in 2010. However, the construction remains incomplete. A structural assessment using current Indonesian building codes and vulnerability analysis is necessary to proceed with construction and ensure the building’s strength against the working loads. Thestructural assessment revealed that several columns could not support the working load, necessitating local retrofitting. In this study, the retrofitting of the building was designed using concrete jacketing. Furthermore, structural fragility curves of the school building were developed before and after retrofitting against earthquake and tsunami loads. The seismic fragility curve was determined from the maximum displacement of the building for varied earthquake acceleration, using nonlinear time history dynamic response analysis scaled using the incremental dynamic analysis method and damage limits defined by ATC-40, characterized by Hazus. Meanwhile, the tsunami fragility curve was determined from the maximum displacement due to tsunami load for each variation of tsunami inundation depth. The vulnerability analysis results indicated that retrofitting the school building with concrete jacketing reduces the probability of building damage due to earthquake loads by 18% at the level of complete damage at a PGA of 0.520 g (based on the Indonesian Seismic Map). Similarly, it reduced the probability of building damage due to tsunami loads by 20%, at the level of complete damage corresponding to a tsunami wave height of 5.00 m for West Pasaman, Indonesia.
Assessment of Damaged Infrastructure Due To Flash Floods and Landslides in Tanah Datar And Agam Regencies, West Sumatra Province: Asesmen Infrastruktur Yang Rusak Akibat Bencana Banjir Bandang dan Tanah Longsor di Kabupaten Tanah Datar dan Agam, Provinsi Sumatera Barat Fauzan, Fauzan; Bambang Istijono; Febrin Anas Ismail; Abdul Hakam; Yenny Narny; Geby Aryo Agista; Aditya Abdi Pratama; Cindy Murdiaman Guci
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 9 No. 3 (2025): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v9i3.25197

Abstract

On Saturday, May 11, 2024, a natural disaster involving cold lahar floods and landslides occurred in Tanah Datar and Agam Regencies, West Sumatra Province. This disaster was triggered by high-intensity rainfall upstream of Mount Marapi, which caused rain-induced lahar flows. Moderate to heavy rainfall eroded and carried volcanic sediment deposits, forming lahar flows. The disaster caused significant damage, including destruction of infrastructure such as roads and bridges, public buildings like mosques and offices, residential houses, and loss of lives. In response to the disaster, Andalas University, through its Disaster Response Center Team from the Research and Community Service Institute (LPPM), conducted a site survey of the affected areas on Monday, May 13, 2024. This community service activity was carried out to assess the damaged infrastructure caused by the flash floods, providing solutions and recommendations for repair and reinforcement, and ensuring the infrastructure's usability post-disaster. This community service (PkM-P) activity was carried out using a comprehensive methodological approach employing field survey techniques. The survey was conducted to gain a clear understanding of the physical condition of the cliffs and their surrounding environment along the Padang-Bukittinggi national road at the coordinates 0°29'36"S 100°20'20"E, which are in a critical state following the Anai River flash flood. The activities included preparation and planning, field surveys, data collection and analysis, as well as reporting and recommendations. The assessment results indicated that the previously implemented methods failed to withstand the high flood pressure. Recommendations for repair and reinforcement include the construction of levees and stream diversions in the Anai River, road drainage systems, planting stronger vegetation, road realignment, and routine monitoring.
Co-Authors Abdul Hakam Aditya Abdi Pratama Bambang Istijono, Bambang Cindy Murdiaman Guci Fauzan Fauzan . Febrin Anas Ismail Masharya Eko Putra Narny, Yenny Yokota, Atsushi Zev Al Jauhari