废弃纤维再生混凝土力学性能及受压本构关系研究

Study on Mechanical Properties and Constitutive Relationship of Waste Fiber Recycled Concrete

对废弃纤维再生混凝土力学性能及其单轴受压本构关系进行了试验研究。通过8组废弃纤维再生混凝土配合比试验,研究了抗压强度、弹性模量、泊松比和峰值应变随纤维长度、骨料用量和纤维掺量改变时的变化规律;采用数据拟合的方法建立了废弃纤维再生混凝土抗压强度、弹性模量、泊松比和峰值应变随纤维长度、骨料用量和纤维掺量而改变的函数关系式,并与GB 50010—2010《混凝土结构设计规范》给出的单轴受压应力-应变关系曲线进行了对比。

The mechanical properties and constitutive relationship of single axial compression of waste fiber recycled concrete were experimentally studied. Through 8 groups of waste fiber recycled concrete mix proportion tests, the change rules of compressive strength, elastic modulus, Poisson＇s ratio and peak strain along with the change of fiber length, aggregate content and fiber content are studied. Data fitting method is adopted to establish the waste fiber recycled concrete compressive strength, elastic modulus, Poisson＇s ratio and peak strain with fiber length, aggregate content and fiber content changed by the function relation formula, and the calculated values are compared with the single axial compression stress-strain curves besed on GB 50010-2010 code for design of concrete structures.