Static, dynamic and creep behaviour of a full-scale GFRP-SFRSCC hybrid footbridge

A three-year research project (Pontalumis) was carried out for the development of an innovative simply supported hybrid footbridge, with 11 m of length and 2 m of width. The footbridge is composed of two pultruded I-shaped glass fibre reinforced polymer (GFRP) girders (400×200(×15) mm2) bonded and bolted to a 37.5 mm thick deck in steel fibre reinforced self-compacting concrete (SFRSCC). The present paper describes the material/structural concept of this footbridge, its design and construction process, and summarizes the response of the prototype when submitted to static short and long-term load tests, and dynamic load tests. The prototype was simple and fast to execute, presenting a reduced dead-weight of only about 3 tonf. The static and dynamic behaviour of the prototype as well as its long-term deflection fulfil standards’ requirements for footbridge structures and are in good agreement with conventional analytical and numerical design tools.

Gonilha, J.A.; Barros, J.A.O.; Correia, J.R.; Sena-Cruz, J.M.; Branco, F.A.; Ramos, L.R.; Gonçalves, D.M.F.; Alvim, M.R.; Santos, T., “Static, dynamic and creep behaviour of a full-scale GFRP-SFRSCC hybrid footbridge”, Composite Structures Journal, 118, 496-509. DOI: 10.1016/j.compstruct.2014.08.009, December 2014.

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