Abstract
Carbon Fibre Reinforced Polymer (CFRP) materials typically has the highest modulus-density ratio among all the commonly available structural materials. Because of this advantageous characteristic, it is most suitable for application in structural members where maximum stiffness and light weight are required, such as cables in long-span cable-stayed bridges. Long span bridges are slender, flexible structures vulnerable to dynamic excitations like wind. The use of CFRP cables in these flexible structures can have a significant impact on their dynamic and aerodynamic responses. In this paper, the effects of using CFRP cables on the dynamic characteristics and aerodynamic behaviour of cable-stayed bridges are investigated. Results show that the use of CFRP cables has a stiffening effect on the bridge system. However, by considering cable transverse motions and the aerodynamic loads acting on the cables in the analysis, it is found that the steel-cable-bridge-system has a better aerodynamic stability performance than the CFRP-cable-bridge-system.
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