The Effect of Tsunami Loads on the Prayoga Foreign Language College Building in Padang City, Indonesia

Abstract

Padang, the capital city of West Sumatra, is located in coastal areas and has a high level of tsunami disaster vulnerability (High-Risk Zone). Therefore, public buildings in Padang City must have certain technical engineering to reduce the risk of structural failure. One of the public buildings that need to be considered as an educational facility and vertical evacuation in Padang City is the Prayoga Foreign Language College (STBA) building. Based on the results of an evaluation conducted by the Andalas University assessment team, the Prayoga STBA building was designed without taking into account the tsunami loads. Therefore, it is necessary to re-analyze the building by taking into account the tsunami loads. In this study, the building was analyzed using ETABS v.18.1.1 software concerning current Indonesian building standards such as SNI 2847:2019 for building structural reinforced concrete requirements, SNI 1726:2019 for earthquake resistance building design, SNI 1727:2020 for minimum design load for buildings, and international standard of FEMA P646-2019 for tsunami loads calculation. The results of the analysis show that the building is able to withstand the earthquake load, but the capacity of the building is insufficient when the tsunami loads are applied to the structure. The beams and columns on the 1 st and 2 nd floors do not have strong enough capacity to resist the tsunami loads, so there is a possibility of structural failure. The effect of tsunami loads on the internal forces and other structural responses of the building is also discussed in this paper.