不同轴压比下碳纤维混凝土柱滞回性能研究  

Study on Hysteretic Behavior of Carbon Fiber Reinforced Concrete Column under Different Axial Compression Ratio

作　　者：徐亚丰[1] 陈谦[1] 张晓平[1] 

机构地区：[1]沈阳建筑大学土木工程学院,110168

出　　处：《混凝土与水泥制品》2014年第12期60-64,共5页China Concrete and Cement Products

基　　金：国家留学基金项目(201308210105)

摘　　要：采用C30混凝土按碳纤维体积掺量2‰进行配合比设计,制作了3个试验试件柱,对其进行水平低周往复加载,分析其在轴压比0.4、0.5、0.6下试件的滞回曲线、骨架曲线及位移延性系数;同时采用ABAQUS软件对碳纤维混凝土柱的滞回性能进行有限元分析,得到碳纤维柱的滞回曲线和应力云图。结果表明,轴压比的变化对试件滞回曲线的饱满程度影响不大,不同轴压比下试件的滞回曲线均比较饱满,没有出现捏拢现象,到达极限承载力后,曲线下降平缓;随着轴压比的增大,试件的极限承载力降低,所对应的极限位移和延性系数均减小。采用ABAQUS软件模拟得到的曲线与试验所得曲线吻合较好。Three specimens of carbon fiber reinforced concrete columns with C30 concrete strength grade and 2‰carbon fiber are tested to study their hysteresis curve, skeleton curve and displacement ductility coefficient when the axial compressive ratios are 0.4, 0.5 and 0.6. And carbon fiber concrete columns are analyzed by using the finite element software ABAQUS, the hysteretic curve and stress nephogram of the columns are achieved. The results show that the change of axial compression ratio has little influence on the full extent of the hysteretic curves. The hysteretic curves under different axial compression ratios are full without significant pinch phenomenon. When the limit bearing capacity of the columns is reached, the skeleton curve decreases slowly. With the increase of axial load ratio, the ultimate bearing capacity and limit displacement decrease. The simulation curve and experimental curve are in good agreement which proved the rationality of simulation.

关 键 词：碳纤维混凝土柱 轴压比 滞回性能 有限元分析 

分 类 号：TU528.572[建筑科学—建筑技术科学]