Title:
A Hybrid FRP-reinforced Slab-on-truss Girder System for Short and Medium Span Bridges
Author(s):
Mamdouh El-Badry, Mohammad Moravvej, and Parham Joulani
Publication:
Symposium Paper
Volume:
327
Issue:
Appears on pages(s):
33.1-33.18
Keywords:
Bridges; concrete-filled FRP tubes (CFFT); deck slab; durability; fiber reinforced polymers (FRP); headed bars; hybrid girder; precast concrete; truss girder.
DOI:
10.14359/51713354
Date:
11/1/2018
Abstract:
An experimental evaluation of a hybrid FRP-concrete slab-on-truss girder bridge system is presented. The
girders consist of pretensioned top and bottom concrete chords connected by vertical and diagonal truss members made
of concrete-filled fiber-reinforced polymer (FRP) tubes. The truss members are connected to the chords by means of
long double-headed glass FRP (GFRP) bars. The chords are also reinforced with GFRP longitudinal bars and
transverse stirrups. The deck slab is connected to the top chords of the girders using double-headed GFRP studs. The
truss girders are thus lighter and more durable than the conventional precast I-girders. The experimental program
consisted of fabricating and testing eight full-scale truss girders including four 2.83-m (9.28-ft) long 2-panel trusses and
four 9.82-m (32.22-ft) long 8-panel trusses, all having the same cross-section dimensions with 1.32-m (4.33-ft) overall
depth. Two of the 2-panel and two of the 8-panel girders were reinforced with GFRP reinforcement. The remaining
four were reinforced with steel and used as control specimens. Two of the 2-panel and two of the 8-panel girders were
covered with a one-meter wide concrete slab connected to the girder top chord by either steel or GFRP double-headed
studs. Tests under static loading showed excellent performance of the system in terms of strength and stiffness.
Related References:
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