Earthquake Performance of Structures in Bohol: A Post-event Assessment of the M7.2 October 2013 Bohol Philippines Earthquake

Type Conference Paper - Proceedings of the 10th Pacific Conference on Earthquake Engineering
Title Earthquake Performance of Structures in Bohol: A Post-event Assessment of the M7.2 October 2013 Bohol Philippines Earthquake
Author(s)
Publication (Day/Month/Year) 2015
City Sydney
Country/State Australia
URL http://www.aees.org.au/wp-content/uploads/2015/12/Paper_98.pdf
Abstract
A M7.2 inland earthquake occurred in Bohol, Philippines on 15 October 2013, leaving behind widespread damage to its built environment. The strong ground shaking is linked to the movement of a newly-discovered thrust fault called the North Bohol Fault. To account for the observed structural damage in Bohol, a comprehensive exposure database that characterizes over 18,000 buildings in urban and rural settings was assembled. This involved a statistical building survey covering both damaged and undamaged structures exposed to various levels of earthquake intensity. The existing building typology developed by local engineers has been considered in classifying the structures based on structural materials, building height and era of construction. The majority of the buildings are residential, with walls made of wood, concrete hollow blocks or confined masonry. The impact on structures is expressed in four damage states. This study primarily aims to validate and constrain the fragility curves for selected building types. In the context of seismic risk assessment, this can potentially lead to better impact forecasts and higher priorities on building regulations and construction practices, which will help establish a more seismically resilient community.

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