Evaluation of residential structures due to the earthquake in Nagari Malampah, Tigo Nagari District, Pasaman

• Main Authors: Hidayat, Kelvin, Masril, Bastian, Elfania, Habirun, Asiya Nurhasanah, Yermadona, Helga, Kurniawan, Deddy, Priana, Surya Eka, Zuheldi, Hafnil, Jon, Endri
• Format: Conference Proceeding
• Language: English
• Subjects: Collapse; Compressive strength; Concrete properties; Damage assessment; Damage prevention; Deviation; Earthquake damage; Earthquakes; Lateral loads; Pattern analysis; Performance evaluation; Plastic properties; Residential buildings; Seismic analysis; Seismic response
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0240262

An earthquake measuring 6.1 on the Richter scale on February 25, 2022 caused serious damage to residential structures in Talu, West Pasaman. The evaluation was carried out to determine the cause of the collapse that occurred in the building structure and the current structural condition of a simple house after the earthquake. Pushover analysis is used to determine the level of performance of a structure using the ATC-40 and FEMA 273/356 methods. In this analysis, it can also be seen the location of the plastic hinges that occur according to iterations of the static lateral load pattern. This study resulted in a pushover curve for the compressive strength of concrete (f’c) of 14,525 MPa. The maximum deviation (δt) in the ATC-40 method in the x-direction is 10,98 cm and the y-direction is 10,95 cm, while for the FEMA 273/356 method, 13.54 cm is obtained in both x and y directions. The displacement target value (δt) obtained has exceeded the maximum allowable deviation (δmax) of 8.75 cm. This shows that residential buildings are classified as unsafe. The performance level of the concrete compressive strength value is in the collapse prevention area or where a condition of the building structure is damaged enough so that it cannot be used anymore.