Abstract Composite floor systems, when compared to reinforced concrete slabs, are a more cost-effective structural solution. The overall behaviour of these composite members depends on the shear connection between steel and the concrete encasement. The pre-cast composite flooring system with hollow-core section presents an efficient and useful solution that helps to reduce the flooring height. This paper reports the results of composite connection push-out and the associated composite beams full-scale tests. The system was composed of a partially encased asymmetric steel beam, and the shear transfer mechanism was established through an innovative shear connection by chemical bonding, friction, and dowel action (by transversal reinforcing bars passing through the web's holes). The tests results indicated that a rigid connection was produced by the chemical bonding and friction of the embedded flange profile in the concrete slab, as well as the composite beam's ability to develop its plastic bending moment capacity. The proposed analytical model provides an efficient way for analysing and designing a composite beam with encased compression flanges. Based on the results from the ultimate flexural resistance analytically obtained, a sensitivity study was also developed to evaluate the most competitive cases in terms of structural efficiency.

中文翻译：

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新型钢-混凝土复合地板的分析研究与试验测试

摘要 与钢筋混凝土板相比，复合楼板系统是一种更具成本效益的结构解决方案。这些复合构件的整体行为取决于钢和混凝土外壳之间的剪切连接。具有空心截面的预制复合地板系统提供了一种有效且有用的解决方案，有助于降低地板高度。本文报告了复合连接推出和相关复合梁全尺寸测试的结果。该系统由部分包裹的非对称钢梁组成，剪切传递机制是通过化学结合、摩擦和销钉作用（通过穿过腹板孔的横向钢筋）的创新剪切连接建立的。测试结果表明，刚性连接是由混凝土板中嵌入式翼缘型材的化学结合和摩擦产生的，以及组合梁发挥其塑性弯矩能力的能力。所提出的分析模型为分析和设计带有封闭压缩翼缘的复合梁提供了一种有效的方法。根据分析获得的最终抗弯强度的结果，还进行了敏感性研究，以评估在结构效率方面最具竞争力的情况。所提出的分析模型为分析和设计带有封闭压缩翼缘的复合梁提供了一种有效的方法。根据分析获得的最终抗弯强度的结果，还进行了敏感性研究，以评估在结构效率方面最具竞争力的情况。所提出的分析模型为分析和设计带有封闭压缩翼缘的复合梁提供了一种有效的方法。根据分析获得的最终抗弯强度的结果，还进行了敏感性研究，以评估在结构效率方面最具竞争力的情况。