Ferdous Wahid, Manalo Allan, AlAjarmeh Omar S, Zhuge Yan, Mohammed Ali A, Bai Yu, Aravinthan Thiru, Schubel Peter
University of Southern Queensland, Centre for Future Materials (CFM), Toowoomba, QLD 4350, Australia.
Tafila Technical University, Department of Civil Engineering, Al Tafila 66110, Jordan.
Polymers (Basel). 2021 Jul 29;13(15):2500. doi: 10.3390/polym13152500.
An innovative beam concept made from hollow FRP tube with external flanges and filled with crumbed rubber concrete was investigated with respect to bending and shear. The performance of the rubberised-concrete-filled specimens was then compared with hollow and normal-concrete-filled tubes. A comparison between flanged and non-flanged hollow and concrete-filled tubes was also implemented. Moreover, finite element simulation was conducted to predict the fundamental behaviour of the beams. The results showed that concrete filling slightly improves bending performance but significantly enhances the shear properties of the beam. Adding 25% of crumb rubber in concrete marginally affects the bending and shear performance of the beam when compared with normal-concrete-filled tubes. Moreover, the stiffness-to-FRP weight ratio of a hollow externally flanged round tube is equivalent to that of a concrete-filled non-flanged round tube. The consideration of the pair-based contact surface between an FRP tube and infill concrete in linear finite element modelling predicted the failure loads within a 15% margin of difference.
研究了一种由带外部法兰的空心纤维增强塑料（FRP）管制成并填充碎橡胶混凝土的创新梁概念在弯曲和剪切方面的性能。然后将填充橡胶混凝土的试件性能与空心和填充普通混凝土的管进行比较。还对带法兰和不带法兰的空心及填充混凝土的管进行了比较。此外，进行了有限元模拟以预测梁的基本性能。结果表明，填充混凝土对弯曲性能有轻微改善，但显著提高了梁的抗剪性能。与填充普通混凝土的管相比，在混凝土中添加25%的碎橡胶对梁的弯曲和剪切性能影响不大。此外，空心外部带法兰圆管的刚度与FRP重量比与填充混凝土不带法兰圆管的相同。在线性有限元建模中考虑FRP管与填充混凝土之间的基于对的接触面，预测的破坏荷载相差在15%以内。
