高性能精细混凝土单轴受压性能试验研究

纤维编织网增强混凝土(TRC)结构因其良好的承载能力、高韧性、不腐蚀、防磁化和薄壁轻质而被认为21世纪最有前途的结构形式之一.作为TRC基体的精细混凝土,没有直接的方法来研究它的力学特性,像σ-ε曲线,抗压、弯曲及张拉强度等.为配合纤维编织网增强混凝土的推广应用,对精细混凝土的单轴受压性能及应力-应变关系进行了试验研究.试验结果表明,精细混凝土的弹性模量比相同抗压强度的普通混凝土低,但极限荷载处应变较大;当用试验得出的模型参数值替代同等强度普通混凝土的参数值,试验曲线和模拟曲线吻合得比较好.

Experimental study of uniaxial compression properties of high performance fine grained concrete

As a result of high bearing capability, excellent ductility, resistance to corrosion, no magnetizing, thin wall and light weight, the textile reinforced concrete (TRC) is expected as one of the most promising structural elements in the 21st century. For the fine grained concrete used as matrix for TRC, there are currently no straightforward methods to research into the mechanical properties such as a-e curves, compressive, flexural and tensile strengths. For popularization and application of TRC, the compressive properties and stress-strain curve of the fine grained concrete under uniaxial compression are studied by experiments. The experimental results show that compared with ordinary concrete with similar compressive strength, the Young's modulus of fine grained concrete is lower, and the strain at ultimate load is higher. When the experimentally determined control parameters are used, experimental curves show very good agreement with the calculated curves.