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Structural Engineering and Mechanics Volume 59, Number 6, September25 2016 , pages 1095-1120 DOI: https://doi.org/10.12989/sem.2016.59.6.1095 |
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Structural behavior of cable-stayed bridges after cable failure |
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Seungjun Kim and Young Jong Kang
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| Abstract | ||
| This paper investigates the change of structural characteristics of steel cable-stayed bridges after cable failure. Cables, considered as the intermediate supports of cable-stayed bridges, can break or fail for several reasons, such as fire, direct vehicle clash accident, extreme weather conditions, and fatigue of cable or anchorage. Also, the replacement of cables can cause temporary disconnection. Because of the structural characteristics with various geometric nonlinearities of cable-stayed bridges, cable failure may cause significant change to the structural state and ultimate behavior. Until now, the characteristics of structural behavior after cable failure have rarely been studied. In this study, rational cable failure analysis is suggested to trace the new equilibrium with structural configuration after the cable failure. Also, the sequence of ultimate analysis for the structure that suffers cable failure is suggested, to study the change of ultimate behavior and load carrying capacity under specific live load conditions. Using these analysis methods, the statical behavior after individual cable failure is studied based on the change of structural configuration, and distribution of internal forces. Also, the change of the ultimate behavior and load carrying capacity under specific live load conditions is investigated, using the proposed analysis method. According to the study, significant change of the statical behavior and ultimate capacity occurs although just one cable fails. | ||
| Key Words | ||
| cable-stayed bridges; cable failure; cable failure analysis; nonlinear analysis; ultimate analysis | ||
| Address | ||
| Seungjun Kim : Department of Construction Safety and Disaster Prevention Engineering, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 34520, Republic of Korea Young Jong Kang : School of Architectural, Civil and Environmental Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea | ||