Performance Assessment of Highway Bridges Under Earthquake and Scour Effects

Content Provider	Semantic Scholar
Author	Alipour, Alice
Copyright Year	2012
Abstract	Bridge foundation scour is the most common cause for the failure of highway bridges in Unites States. To make sure that a highway bridge is capable of resisting structural degradation due to scour in addition to other natural hazards, development of a multi-hazard approach is necessary. Towards this goal, the current paper studies the combined effects of scouring and earthquake on the performance of RC bridges. The extent of scour represented by scour depth is estimated and its associated uncertainties are considered. Based on the probability distribution of scour depths obtained from Monte Carlo simulations, risk curves are developed to find the probability of occurrence of scour at the location of bridge. From the nonlinear time-history analysis of bridges, maximum structural responses and ductility ratios are calculated and bridge fragility parameters are estimated for a range of scour depths. The fragility curves developed based on the joint probabilities of scouring and earthquake clearly show that the lateral load bearing capacity of bridge decreases with the increase in the scour depth.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.iitk.ac.in/nicee/wcee/article/WCEE2012_5066.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article