Resilience assessment of transportation infrastructure is a crucial aspect of ensuring the continued functionality of a city or region in the face of various disruptions.However,these infrastructures are also vulnerab...Resilience assessment of transportation infrastructure is a crucial aspect of ensuring the continued functionality of a city or region in the face of various disruptions.However,these infrastructures are also vulnerable to various types of disruptions,such as natural disasters.The ability of transportation infrastructures to withstand and recover from such disruptions is referred to as their resilience.This research presents a comprehensive framework to develop the resilience surface for assessing the resilience of transportation infrastructure such as bridges,roads,and tunnels.The framework involves the identification of the unique damage configurations through performing the fragility analysis,and the restoration of the infrastructures through developing recovery curves for each damage configuration by considering the relevant restoration data.The framework also considers the inherent uncertainty in the hazard intensity,modeling uncertainty,and restoration process.The framework is illustrated through the application to a case study of a highway bridge in Canada.The aim of this paper is to provide a useful tool for decision-makers to evaluate and improve the resilience of transportation infrastructures.展开更多
The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof.To assess the performance a...The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof.To assess the performance and the reliability of low-rise wood-frame residential buildings with a focus on the roofs,fragility analysis can be used to estimate the probability of failure of a roof when constructed with specified nails and sheathing sizes.Thus,this paper examines the fragility of specific types of nails,roof-to-wall(RW)connection details,and sheathing sizes based on the damaged roofs that were previously assessed in the Dunrobin area in Ottawa(Ontario)that was hit with an Enhanced Fujita(EF3)tornado on September 21,2018.The presented fragility analysis considers four scenarios,including different sheathing and nail sizes.Dead loads,wind loads,and resistance on the sheathing panels were compiled and analyzed to determine the failure of the examined roofs.The eight fragility models suggest that the safest roof sheathing(RS)is the 1.22 m×1.22 m sheathing panel with 8 d nails,and the safest RW connections is achieved by using H2.5 hurricane clips.展开更多
文摘Resilience assessment of transportation infrastructure is a crucial aspect of ensuring the continued functionality of a city or region in the face of various disruptions.However,these infrastructures are also vulnerable to various types of disruptions,such as natural disasters.The ability of transportation infrastructures to withstand and recover from such disruptions is referred to as their resilience.This research presents a comprehensive framework to develop the resilience surface for assessing the resilience of transportation infrastructure such as bridges,roads,and tunnels.The framework involves the identification of the unique damage configurations through performing the fragility analysis,and the restoration of the infrastructures through developing recovery curves for each damage configuration by considering the relevant restoration data.The framework also considers the inherent uncertainty in the hazard intensity,modeling uncertainty,and restoration process.The framework is illustrated through the application to a case study of a highway bridge in Canada.The aim of this paper is to provide a useful tool for decision-makers to evaluate and improve the resilience of transportation infrastructures.
基金The first and the second authors would like to thank the Natural Sciences and Engineering Council of Canada for the financial support provided through the grant:RGPIN-2017-04197 NSERC DG.
文摘The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof.To assess the performance and the reliability of low-rise wood-frame residential buildings with a focus on the roofs,fragility analysis can be used to estimate the probability of failure of a roof when constructed with specified nails and sheathing sizes.Thus,this paper examines the fragility of specific types of nails,roof-to-wall(RW)connection details,and sheathing sizes based on the damaged roofs that were previously assessed in the Dunrobin area in Ottawa(Ontario)that was hit with an Enhanced Fujita(EF3)tornado on September 21,2018.The presented fragility analysis considers four scenarios,including different sheathing and nail sizes.Dead loads,wind loads,and resistance on the sheathing panels were compiled and analyzed to determine the failure of the examined roofs.The eight fragility models suggest that the safest roof sheathing(RS)is the 1.22 m×1.22 m sheathing panel with 8 d nails,and the safest RW connections is achieved by using H2.5 hurricane clips.
