纤维布加固高轴压混凝土柱抗震性能

设计了 3个高轴压混凝土柱试件 ,其中 1个为对比试件 ,2个为采用了不同包裹形式的纤维布加固试件 ;在低周反复荷载作用下 ,通过对试验现象和测试数据详细的描述与对比分析 ,研究了纤维布加固法对高轴压混凝土柱抗震性能的改善情况 ;利用通用有限元计算程序 ,对低周反复试验进行了全过程仿真模拟 .研究表明 ,适宜的纤维布加固方式 ,可以大幅度提高高轴压混凝土柱的抗震性能 ,同时利用考虑纤维布约束混凝土本构关系的有限元计算方法能够较为准确地模拟纤维布加固高轴压混凝土柱的非线性性能 .

Study on Seismic Behavior of High-level Axial Compression Concrete Columns Strengthened with FRP

This paper engages in the seismic behavior of concrete columns strengthened with fiber reinforced polymer (FRP).Three concrete columns with high axial compressive stress ratio are designed,including one control specimen and two specimens with different types of FRP-encased pattern. Under low frequency cyclic loading, test phenomena are described in details. Furthermore,the seismic behaviors of the columns are analyzed and compared.With the aid of finite element program,the tests are non-linearly simulated by computer.It is concluded from this investigation that the seismic behavior of high-level axial compression concrete columns strengthened with FRP can be improved obviously.Moreover,the results indicate that the finite element program concerning the FRP-confined effect can simulate properly the nonlinear character of concrete columns strengthened with FRP.