Steel beams acting compositely with concrete slabs usually have considerably high strength-to-weight ratios. The evaluation of the effective concrete slab width plays an important role for the accurate design of composite beams. Since the shear-lag phenomenon is influenced by the behaviour of the materials comprising the composite beam, revisiting this phenomenon when using high grade steel beams and/or light weight concrete slab becomes crucial. Also, the variation of the stress distribution through the slab thickness changes according to the size of the steel section. In addition, the relationship between the effective concrete slab width and the slenderness ratio of the steel beam are studied to evaluate its effect on the behaviour of composite beams. The utilization of partial composite action will lead to higher slip rates at the interface between the concrete slab and steel beam, which, finally, leads to increased beam deflection.

Research Team

1. Amr Shaat
2. Ayman Khalil
3. Amr Zaher

Related Journal Publication List

1. “Factors Affecting Slip and Stress Distribution of Concrete Slabs in Composite Beams” A., Lasheen, M., Shaat, A., Zaher, A. and Khalil, A Engineering Structures Journal, Kamar, (2021) V. 245:112880.
2. “Numerical Evaluation for the Effective Slab Width of Steel-Concrete Composite Beams” Lasheen, M., Shaat, A. and Khalil, A. (2018) Journal of Constructional Steel Research V. 148: 124-137.
3. “Behaviour of Lightweight Concrete Slabs Acting Compositely with Steel I-Sections” Lasheen, M., Shaat, A. and Khalil, A. (2016) Journal of Construction and Building Materials V. 124: 967-981.