A Shear-Deformation Series Solution for Design Analysis of FRP Composite Deck-and-Stringer Bridges

摘要

A comprehensive study on analysis and design of FRP composite deck-and-stringer bridges is presented. The FRP decks considered consist of contiguous thin-walled box sections that are fabricated by bonding side-by-side pultruded thin-walled box beams and placed transversely over FRP composite stringers. A simplified design analysis procedure for cellular FRP bridge decks is developed based on a first-order Shear Deformation Macro-Flexibility (SDMF) orthotropic plate solution. The present approach can permit the designers to analyze, design, and optimize material architectures and shapes of FRP beams as well as various bridge deck configurations before their implementation in the field. Experimental studies of cellular FRP bridge decks are conducted to obtain stiffness coefficients. An example of a cellular FRP deck on optimized winged-box FRP stringers under actual truck-loading is presented. The experimental/analytical approach presented is used to propose simplified design equations for new and replacement highway FRP deck-and-stringer bridges.