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Increasing Seismic Resilience of Philippines’ School Infrastructure through Structural Retrofitting
Philippines is one of the most earthquake-prone countries in the world, regularly subjected to destructive seismic events, inflicting loss of lives and costly damage to the country’s infrastructure. Educational facilities are often among the most exposed and vulnerable infrastructure, requiring special attention in terms of seismic risk assessment and prioritization for structural retrofitting and disaster risk reduction. Hence, this study first investigates the seismic performance of two index buildings representing typical existing schools in the Philippines. The selection of the two index buildings follows a recently conducted rapid visual survey in the region and the gathering of detailed structural drawings of typical schools. The results obtained through nonlinear static analysis of the modelled index buildings indicate the possibility of a soft storey mechanics at the ground floor of both structures. To mitigate the identified structural deficiencies and improve the overall seismic performance of the two case-study structures, a retrofitting measure is then proposed. Specifically, fibre reinforced polymer (FRP) wrapping is designed for all beams and columns following recent international provisions and state-of-the-art practice. Furthermore, the effect of FRP retrofitting on the seismic capacity of the selected structures is measured through derivation of fragility functions for various damage states. The results of the analysis indicate a considerable improvement in the overall seismic performance of each considered structural system, particularly as the structure enters its inelastic behaviour. This study represents the first step toward identifying the most technically feasible and economical mitigation strategy for the vulnerable schools in the Philippines.
Increasing Seismic Resilience of Philippines’ School Infrastructure through Structural Retrofitting
Philippines is one of the most earthquake-prone countries in the world, regularly subjected to destructive seismic events, inflicting loss of lives and costly damage to the country’s infrastructure. Educational facilities are often among the most exposed and vulnerable infrastructure, requiring special attention in terms of seismic risk assessment and prioritization for structural retrofitting and disaster risk reduction. Hence, this study first investigates the seismic performance of two index buildings representing typical existing schools in the Philippines. The selection of the two index buildings follows a recently conducted rapid visual survey in the region and the gathering of detailed structural drawings of typical schools. The results obtained through nonlinear static analysis of the modelled index buildings indicate the possibility of a soft storey mechanics at the ground floor of both structures. To mitigate the identified structural deficiencies and improve the overall seismic performance of the two case-study structures, a retrofitting measure is then proposed. Specifically, fibre reinforced polymer (FRP) wrapping is designed for all beams and columns following recent international provisions and state-of-the-art practice. Furthermore, the effect of FRP retrofitting on the seismic capacity of the selected structures is measured through derivation of fragility functions for various damage states. The results of the analysis indicate a considerable improvement in the overall seismic performance of each considered structural system, particularly as the structure enters its inelastic behaviour. This study represents the first step toward identifying the most technically feasible and economical mitigation strategy for the vulnerable schools in the Philippines.
Increasing Seismic Resilience of Philippines’ School Infrastructure through Structural Retrofitting
Nassirpour, A (author) / D'Ayala, D (author) / Galasso, C (author)
2018-06-18
In: Proceedings of the 16th Conference on European Association of Earthquake Engineering (EAEE) 2018. European Association of Earthquake Engineering (EAEE): Thessaloniki, Greece. (2018) (In press).
Paper
Electronic Resource
English
DDC:
621
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