不同配筋率的再生混凝土柱抗震性能试验研究

An Experimental Study on the Seismic Behavior of Recycled Concrete Columns with Different Reinforcement Ratio

本文对1根普通混凝土柱和4根全再生混凝土柱模型进行了低周反复荷载试验研究,模型按1/2缩尺。在试验基础上,分析了其承载力、刚度及其退化过程、滞回特性、延性、耗能能力、破坏形态等。研究表明:随着配筋率的增加,再生混凝土柱的承载力、刚度、耗能能力均有提高;同时,建立了基于再生混凝土强度折减的承载力实用计算方法,其计算结果与试验结果符合较好。

A series of laboratory experiments of five 1 / 2 scale columns under cyclic loading action were performed. Among 5 columns, one is a natural concrete column and four are recycled concrete columns. Load-carrying capacity, stiffness and its deterioration process, hysteretic loop, ductility, energy dissipation and failure patterns were analyzed on the basis of the experiments. A practical method of load-carrying capacity calculation based on concrete strength reduction was proposed. Our results show that, with the increase of reinforcement ratio, load-carrying capacities, stiffness, and dissipation of the columns were improved. A practical method of load-carrying capacity calculation based on concrete strength reduction was proposed in this paper, and the calculatied results are in good agreement with experimental results.