Structural Optimization of FRP Web Core Decks

AbstractThe writers report an efficient technique for the analysis and design of fiber-reinforced polymer (FRP) web core decks for highway culverts. This technique is based on finite-element modeling and an iterative optimization scheme for different spans, ranging from 2–5 m, that have a carriageway width of 7.5 m, in accordance with Indian loading conditions. The FRP web core deck system that is considered in this paper consists of laminated web cores with equally spaced webs, oriented only in the transverse direction, and were placed between the top and bottom laminated face plates. The culvert decks were simply supported on two opposing edges, whereas the remaining edges were assumed to be free. These were subjected to self-weight and imposed live load. The thicknesses of the webs, top and bottom face plates, number of webs in the core, and depths of the web core of the FRP culverts are considered as the basic design parameters for the structural optimization. The optimization followed different crite...

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