SHEAR FAILURE OF UHPC-FRP HYBRID BEAMS
The Paper includes an experimental study focusing on the shear performance of a hybrid section built from glass fibre reinforced polymer(GFRP)rectangular hollow section,an ultra-high performance concrete(UHPC)flange and a bottom sheet made of steel reinforced polymer(SRP)or carbon fibre reinforced polymer(CFRP).This section has distinct structural strength compared to sections made from conventional materials.Eight specimens were tested by applying a point load 280 mm from one support over a clear span of 1120 mm to induce shear failure.All specimens failed similarly,indicating consistent behaviour for shear failure regardless of the changing bottom plate and flange dimensions.Failure happened by crack propagation at the corners of the GRFP rectangular section followed by cracking of the UHPC flange.Elastic analysis of the shear stresses at the failure point showed that high shear stresses are not the m cause of this mode of failure.The cause of failure is interpreted using a simple finite element model as bending failure at the corners.Per this reason,proper design should be done for the corners in the case of unidirectional pultruded sections.
Pultruded GFRP Shear Hybrid UHPC Externally bonded
Mina Iskander Raafat El-Hacha Nigel Shrive
Department of Civil Engineering,Schulich School of Engineering,University of Calgary 2500 University Dr.NW,Calgary,Alberta,T2N 1N4,Canada
国际会议
新加坡
英文
1-4
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）