性能增强再生混凝土框架中节点非线性分析

Nonlinear analysis of performance enhanced recycled concrete frame joints

再生混凝土作为一种再生资源近年来被广泛应用,在此基础上加入钢纤维和tank纤维制成性能增强再生混凝土,使结构的安全可靠性得到了进一步保证。采用有限元软件ABAQUS对3个混杂纤维掺量分别为0、0.5%、1%的再生混凝土框架中节点进行低周反复试验分析,得到了它们的滞回曲线和骨架曲线,并进行了对比分析。研究表明:相较于普通再生混凝土而言,性能增强再生混凝土框架中节点的耗能性能可提高20%、32%,抗开裂性能及极限承载力性能也更为优异,能够应用于实际工程之中。

Recycled concrete as a renewable resource has beenr widely used in recent years, on the basis of adding steel fibers and tank fiber to make performance - enhanced recycled concrete, safety and reliability of the structure may be further guaranteed. In this paper, using the finite element software ABAQUS, the low - cyclic reversed loading tests analysis of three recycled concrete frame joints with different hybrid fiber content of 0, 0.5% , 1% were conducted and their hysteresis curves and skeleton curves, were obtained and contrast. The research show that compared to the ordinary recycled concrete, the energy dissipation capacity of the performance enhanced recycled concrete frame joints can increase 20% ,32% for different fiber mixed amount, cracking -resistant capacity and ul- timate bearing capacity are also more excellent, which can be applied in practical engineering.