Abstract
This chapter introduces fiber-reinforced polymer (FRP) applications for cable-stayed bridges with carbon fiber-reinforced polymer (CFRP) stay cables, hybrid stay cables, and/or a CFRP bridge deck. For each of these CFRP components, key design parameters and design strategies are determined and the appropriate value of each key design parameter is suggested. Using the suggested parameter values, six types of cable-stayed bridges with a main span length of 1400m are selected and modeled with the finite element method, through which the procedures of designing composite cable-stayed bridges with CFRP components are presented in detail. From a mechanical-behavior viewpoint (static and dynamic) a comparative study of composite cable-stayed bridges with various CFRP components is performed through numerical simulation. The economic aspects of each type of cable-stayed bridge is also comparatively studied with respect to material prices. With their high strength-to-weight ratio, and other advantages of CFRP materials, it is proven in this study that the use of CFRP components in super-long-span cable-stayed bridges is feasible, and that these types of composite cable-stayed bridges could become excellent alternatives to steel cable-stayed bridges where super-long spans are desired.
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