ABSTRACT

A lightning induced fire damaged three stay cables of a cable stayed bridge in Korea. The steel-concrete composite cable st ayed bridge is 990m -long and consists of three cable-stayed spans of 200m + 470m + 200m and two 60m -long end spans. The cable-stayed span is suppor ted by 144 parallel wire strand (PWS) cables. The fire caused by lightning strike led to complete rupture of one stay cable and partial rupture of two more stay cables. The bridge was closed for 15 days to remove and reinstall damaged stay cables. This extreme event provides an opportunity to review the resi lience of the cable-stayed bridge. A resilience of infrastructure is usually defined as the ability to re duce the magnitude and duration of da mage caused by extreme events. As the number of natural and man-made disasters has increased these days, the vulnerability and resilience of highway bridges need to be evaluate d and improved. The resilience can be evaluated through four “R”s: robustness, redundancy, resourcefulness, and rapidity. In this paper, the resilience of the cable-stayed bridge is evaluated in terms of four “R”s.