This research paper discusses the influence of the flexibility of girders in Slim Floor structures on the reduced load capacity of prestressed HC slabs. The current state of knowledge in the field of the transverse behaviour of hollow core slabs is presented. Contradictory information provided in the literature as well as the computational comparative analysis of the existing theoretical models has demonstrated the need for better recognition of the issue of the effect of reinforced concrete topping layer on the load capacity of HC slabs. The paper includes the presentation of experimental tests, the purpose of which was to reproduce the actual work conditions of hollow core slabs depending on their location on the floor and the numerical analyses supplemented these studies. As a result of the conducted tests and analyses, it was found that the increased flexibility of the support beam resulted in an adverse change in the stress state of the hollow core slab, which may lead to the exceedance of the limit state of shear capacity, while laying an additional layer of structural topping on precast hollow core slabs significantly increased the shear capacity of the floor, and thus safety of the structure. The research also indicates that in all the tested topped elements full composite action up to the failure was shown.

本文探讨了超薄楼板结构中的大梁的柔韧性对预应​​力HC平板降低的承载能力的影响。介绍了空心板横向性能领域的最新知识。文献中提供的矛盾信息以及对现有理论模型的计算比较分析表明，需要更好地认识钢筋混凝土顶层对HC板的承载能力的影响。本文包括实验测试的介绍，目的是根据空心板在地板上的位置来再现空心板的实际工作条件，并通过数值分析对这些研究进行补充。作为进行测试和分析的结果，结果发现，支撑梁的挠性增加导致空心板的应力状态发生不利变化，这可能会导致超过极限剪切状态，同时在预制件上铺上一层附加的结构顶层空心板大大提高了地板的剪切能力，从而提高了结构的安全性。研究还表明，在所有测试的顶部元素中，均显示出直至失效为止的完整复合动作。因此结构的安全性。研究还表明，在所有测试的顶部元素中，均显示出直至失效为止的完整复合动作。因此结构的安全性。研究还表明，在所有测试的顶部元素中，均显示出直至失效为止的完整复合动作。