An experimental program is carried out to examine the effects of different factors on the slip and stress distribution of concrete slabs in composite beams. A total of ten steel–concrete composite beams with a span of 4.80 m are tested to find the effects of the type of shear connectors and the concrete slab reinforcement on the behaviour of composite beams. All beams consist of monosymmetric steel cross-sections connected to 120 cm wide concrete slabs. Welded shear connectors (angles or channels) spaced at 20 cm are used to connect the concrete slabs to the steel beams. The concrete slabs of eight beams are provided with a lower steel reinforcement only while two beams are provided with both lower and upper steel reinforcement. The results showed that the ultimate load capacity of composite beam with channel connectors is 14% higher than the counterpart beam with angle connectors and 30% stiffer in resisting the slip of the concrete slab. Moreover, composite beams with channel connectors tend to maintain strain compatibility at the interface between concrete slab and steel section better than the counterpart beams with angle connectors. It is also found that using upper steel reinforcement mesh enhances the stress distribution in the concrete slab until failure. It is found that increasing the reinforcement ratio of the concrete slab from 0.18% to 0.46% increases the flexural strength of the composite beams by 7.45%, while decreases the deflection values by 23%. Moreover, using upper steel reinforcement prevented the longitudinal cracking of the top surface of the concrete slab and allowed for full plastification of the steel cross-sections.

进行了一个实验程序来检查不同因素对组合梁中混凝土板的滑移和应力分布的影响。共测试了 10 根跨度为 4.80 m 的钢-混凝土组合梁，以找出剪力连接件类型和混凝土板配筋对组合梁性能的影响。所有梁均由连接到 120 厘米宽的混凝土板的单对称钢横截面组成。间距为 20 cm 的焊接剪力接头（角钢或槽钢）用于将混凝土板连接到钢梁。八根梁的混凝土板只设置下钢筋，而两根梁同时设置下钢筋和上钢筋。结果表明，带槽钢连接件的组合梁的极限承载能力比带角连接件的对应梁高14%，抗混凝土板滑移刚度提高30%。此外，与带角连接件的组合梁相比，带有通道连接件的组合梁在混凝土板和钢截面之间的界面处往往能更好地保持应变兼容性。还发现使用上部钢筋网增强了混凝土板中的应力分布直至破坏。结果表明，将混凝土板配筋率从0.18%提高到0.46%，组合梁的抗弯强度提高了7.45%，挠度值降低了23%。而且，