Advanced Steel Construction

Vol. 11, No. 3, pp. 395-410 (2015)



Chun-sheng Wang 1,*, Mu-sai Zhai1, Hai-ting Li 1, Yi-qing Ni 2 and Tong Guo 3
1 Engineering Research Center for Large Highway Structure Safety of Ministry of Education, College of Highways, Chang'an University, Xi'an, Shaanxi Province, China
2 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
3 Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing, China
*(Corresponding author: E-mail:
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DOI : 10.18057/IJASC.2015.11.3.12



Initial cost was mainly considered in constructing a bridge in the past, whereas future payments such as the cost of strengthening or rehabilitation were neglected. This situation has brought numerous economic as well as social problems due to the lack of rational maintenance and rehabilitation strategies. Thus, it is necessary and urgent to develop appropriate bridge maintenance and rehabilitation strategies that not only meet serviceability criteria but also consider the life-cycle cost (LCC) optimization. This paper discusses major hazards of in-service cable supported bridges, including fatigue cracking of orthotropic steel decks, deterioration of cables, damage of main cables, hangers and expansion joints et al. Advanced maintenance and rehabilitation tools are introduced to save the life-cycle cost, acoustic emission monitoring technique and cold retrofit technique are detailed studied. A framework is provided for the strategies of maintenance and rehabilitation based on life-cycle cost. The framework takes into account of the safety, serviceability and sustainability during the lifetime of cable supported bridges.


Keywords:Cable supported bridge, Fatigue and fracture, Durability, Life-cycle cost, Maintenance and rehabilitation, Cold retrofit technique, Sustainability

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