Abstract
This research presents an experimental program to study the effect of using angle shear connectors instead of the headed stud on the flexural behavior of composite beams under negative bending moment (NBM). Both the angle and headed stud shear connectors used in this study have the same cross-sectional area. Five composite beams were casted and tested using three-point load configuration to ensure the NBM effect. Different parameters were included in this study such as the type of shear connector, bond interaction (partial and complete bond interaction) and arrangement of angle shear connectors. Two proposals method were suggested for angle setting in this study to investigate the structural behavior of the composite section. It has been found that, in the case of single angle shear connectors, the ultimate strength decreased by 4.12% compared with samples with the headed stud shear connectors. The direction of the angle setting has been shown to affect the flexural behavior of the composite section.
Highlights
Composite member, generally, is a combination of two or more elements
From the experimental results of the adopted specimens that performed to study the behavior of angle shear connectors in the composite section subject to negative bending moment (NBM), the main conclusions of this study are: 1. The ultimate strength decreased by a ratio of (4.12) % when the single angle shear connectors were used instead of headed stud
The ultimate strength increased by a ratio of (2.89) % than the double headed stud when the first suggested arrangement of double angle shear connectors was used (C.B40.L21), while the ultimate strength decreased by a ratio of (5.88)% than double headed stud for the second arrangement suggested (C.B40.L22)
Summary
Composite member is a combination of two or more elements. The bond between these elements is the key that controls the performance of the composite member. Choi et al (2008) [1] conducted an experimental program and finite element analysis (FEA) to investigate the fatigue strength of welded joints between angle shear connectors and the bottom plate in steelconcrete composite slabs. Shariati et al (2014) [3] investigated the angle shear connectors embedded in high strength concrete (HSC) slab behaviour experimentally using push-out specimens. Shariati et al (2016) [8] conducted push-out tests to compare the channel and angle shear connectors performance embedded in HSC composites. Different experimental programs were used to evaluate the shear connector design strength such as push-out test specimens. An experimental program is adopted to study the effect of use angle shear connectors instead of the headed stud on the flexural behavior of composite beam under NBM. Both the angle and headed stud shear connectors have the same cross section area
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