Craveiro Hélder D, Rahnavard Rohola, Henriques José, Simões Rui A
Department of Civil Engineering, ISISE, University of Coimbra, Rua Luís Reis Santos, 3030-790 Coimbra, Portugal.
Faculty of Engineering Technology, CERG, University of Hasselt, BE 3590 Diepenbeek, Belgium.
Materials (Basel). 2022 Mar 15;15(6):2159. doi: 10.3390/ma15062159.
Concrete-filled composite columns are widely used in the construction industry, exploiting the benefits of combining steel and concrete, providing, for instance, high load-bearing capacities and enhanced fire resistance. These solutions are extensively used in high-rise buildings and/or when high fire resistance performance requirements are imposed. In this exploratory research, a new type of concrete-filled composite column is investigated using fire resistance tests. Promoting the use of cold-formed steel products and developing innovative solutions for low-rise buildings with lower passive fire protection requirements led to the solutions presented in this research. Hence, a set of fire-resistance tests were undertaken on concrete-filled closed built-up cold-formed steel columns, where single cold-formed steel shapes are combined and fastened to create a box-shaped cross-section. The experimental results were then compared with the corresponding bare steel solutions to assess, in detail, the observed enhancements. Additionally, the effect of restraint on thermal elongation was assessed.
钢管混凝土组合柱在建筑行业中被广泛应用，它利用了钢与混凝土结合的优势，例如具有较高的承载能力和增强的耐火性。这些解决方案广泛应用于高层建筑和/或对耐火性能有较高要求的场合。在这项探索性研究中，通过耐火试验对一种新型钢管混凝土组合柱进行了研究。推广冷弯型钢产品的使用，并为被动防火要求较低的低层建筑开发创新解决方案，从而产生了本研究中提出的解决方案。因此，对钢管混凝土封闭式冷弯型钢组合柱进行了一系列耐火试验，其中将单个冷弯型钢形状组合并固定以形成箱形截面。然后将实验结果与相应的裸钢解决方案进行比较，以详细评估观察到的增强效果。此外，还评估了约束对热伸长的影响。
