1. Preliminary identification of housing vulnerability in downtown Langsa due to earthquakes hazard.
- Author
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Fajri, Haikal, Fahriana, Nina, Irwansyah, Lisa, Nova Purnama, and Atas, Zaenal Abidin Al
- Abstract
BPBD reported that the largest loss due to the earthquake with a magnitude of 6.1 in 2013 that hit Central Aceh was in the housing sector. Furthermore, in 2016 an earthquake with a magnitude of 6.5 in the downtown of Pidie Jaya district which destroyed around 10,000 buildings and displaced more than 85,000 lives. In 2018, the BMKG recorded an earthquake with a magnitude of 5.3 with a depth of 10 KM had occurred several times with the epicenter not far from the downtown. Moreover, an aftershock with a magnitude of 4.9 occurred in 2020 at a location close to the previous earthquake. Seeing the earthquake phenomenon that regularly occurs and the distance from the epicenter point to the city center and settlements which are very close, this study aims to identify the vulnerability of housing in the downtown Langsa to the existing earthquake hazards. Supervision of the type of building is carried out in the city center visually. Furthermore, the ground motion equation is carried out with a scenario of an earthquake with a magnitude of 5-7 with an epicenter point of 22 km from the city center at a depth of 10 km. Based on the results of a survey of 597 buildings in the city center, there are 5 dominant types of residential buildings, namely URML, RM2L, RM2M, W1 and C3L. The type of building that has the greatest probability of failure is C3L while the strongest building is the RM2M building. In average, the probability of structural failure in earthquakes of magnitude 5 and 6 only occurs less than 50%, namely at 5.75% and 40.03%. Meanwhile, at magnitudes 6.5 and 7 the increase in failure continued to increase, namely at 67.91% and 89.24%, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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