ENGINEERING JOURNAL CHIANG MAI UNIVERSITY

Volume 27, No. 01, Month APRIL, Year 2020, Pages 33 - 41

Damage assessment of buildings in chiang mai municipal area before and after strengthening under an anticipated earthquake

Akkachai Ketsap, Chayanon Hansapinyo, Panon Latcharote and Koraphon Saicheur

Abstract Download PDF

This research was aimed to perform damage assessment of buildings in Chiang Mai municipal area before and after strengthening under an anticipated earthquake. Building information in the study area was first collected. Then, the nearest fault was considered for making an earthquake scenario. The assumed earthquake was estimated at 6.3 Magnitude according to the fault length at the epicentre of Latitude and Longitude point of (18.901,98.916). Then, an attenuation model was adopted to estimate the peak ground acceleration at every building. Next, the performance of buildings was estimated considering the acceleration with the building capacity curve. Then, the fragility function was adopted for the determination of the damage level. From the earthquake simulation, 80,290 buildings in the area which are 22.33 million square meters of the functional area, the complete damage was 7.29 million square meters. In the case of seismic strengthening for all buildings, the complete damage area was reduced to 2.70 square meters.

Keywords

Earthquake, Chiang Mai, Strengthening, Loss estimation, Spatial analysis

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