Structural Behaviour of Steel-Fibre-Reinforced Lightweight Concrete
Structural Behaviour of Steel-Fibre-Reinforced Lightweight Concrete
复制标题
钢纤维轻质混凝土的结构性能
DOI：
10.1007/978-3-030-58482-5_65
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
A. Abbas
中科院分区：
文献类型：
--
作者：
H. Al;A. Abbas
本文评估的影响，添加钩端三维纤维再生轻质混凝土梁和无抗剪钢筋。所用的轻质混凝土来自回收的粉煤灰，可以减少结构的质量。然而，它通常比正常重量的混凝土更脆。为了提高延性，使用钢纤维和完全和部分取代箍筋纤维进行了研究。研究了三点荷载作用下有足够、不合格和无剪力配筋的钢纤维混凝土梁的抗弯和抗剪性能。试验包括Vf= 0%、1%和2%，箍筋间距为120 mm、240 mm和∞。文中给出了强度、延性、裂纹形态和破坏性质的计算结果。结果表明，纤维增强材料能够部分替代箍筋，但当箍筋被完全去除时，破坏变得脆性。使用ABAQUS的非线性有限元分析（NLFEA）也被用来验证SFRLC本构模型，其属性来自压缩和拔出试验。
This paper evaluates the influence of adding hooked-end 3D fibres to recycled lightweight concrete beams with and without shear reinforcement. Lightweight concrete used is from recycled fly ash and can lead to reductions in the mass of the structure. However, it is typically more brittle than normal weight concrete. To enhance ductility, steel fibres were used and the complete and partial substitution of stirrups with fibres was investigated. The flexural and shear behaviour of SFRLC beams under 3-point loading with adequate, substandard and no shear reinforcement are studied. The experimental study includes Vf= 0%, 1% and 2% as well as stirrups spacing of 120 mm, 240 mm and ∞. The results in this paper are given in terms of strength, ductility, crack patterns and nature of failure. It was found out that fibre reinforcement is capable of partially replacing stirrups, however, when stirrups were completely removed the failure became brittle. Nonlinear finite element analysis (NLFEA) using ABAQUS is also used to validate a SFRLC constitutive model whose properties were derived from compressive and pullout-tests.