West Sumatra has a high risk of earthquakes. Because the only plate that has not been broken and stores large amounts of energy is located in the Mentawai area. If the plate is broken, there will be a big earthquake, the bigger the earthquake, the higher the probability of a large aftershock. This study examines how successive earthquakes affect the resistance of reinforced concrete structures. To find out whether the building is earthquake-safe, several analyzes were carried out in the form of deviation between floors, lateral displacement and basic shear forces, where the permit boundaries have been regulated in SNI 1726: 2012. And to determine the effect of successive earthquakes on structural resistance, it can be viewed from the percentage of damage to beam and column elements that occurs after successive earthquakes. The successive earthquakes in this study are the modification of the largest earthquake that occurred in the city of Padang, with several successive earthquake scenarios ranging from small to large. There are two structural models analyzed in this study, the difference between these two models is only in the properties of the column section, where for the first model the column section is smaller than the second model. For the first model structure, the value of the deviation between floors and lateral displacement in the event of a single earthquake crosses the permit boundary, and at the time of successive earthquakes with the largest successive earthquake scenario, the structure is heavily damaged or destroyed in the first floor column structural elements. For the second model structure, the value of deviation between floors and lateral displacement in the event of a single earthquake does not exceed the permit limit, and at the time of successive earthquake events, both for the smallest successive earthquake scenario to the largest successive earthquake scenario, the structure is not heavily damaged or destroyed. The results of this study indicate that, for a building structure whose value of deviation between floors and lateral displacement exceeds the permit boundary, the structure will experience additional damage and even destruction during successive earthquakes. And, for structures where the value of the deviation between floors and lateral displacement does not exceed the permit limit, then during a series of earthquakes there will be no significant additional damage to the elements.
Hosbirahman, Putra (2019) Pengaruh Gempa Beruntun Terhadap Ketahanan Struktur Beton Bertulang. Diploma thesis, Universitas Andalas.