建筑结构

2000, (07) 40-43+64

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碳纤维布约束混凝土应力-应变全曲线的试验研究
Research on Compressive Stress-strain Relationship of Concrete Confined with Continuous CFS

赵彤,谢剑,戴自强
Zhao Tong Xie Jian Dai Ziqiang

摘要(Abstract):

在合理评定碳纤维布有关力学指标的基础上 ,进行了碳纤维布约束混凝土的受压性能试验。根据试验研究了碳纤维布使用量对普通混凝土抗压强度和变形性能的影响。试验研究发现 :试件包裹碳纤维布后可以提高混凝土的抗压强度 ,并可有效地改善混凝土的变形性能 ,其效果随碳纤维布用量的增加而增大 ;在碳纤维布用量相同的情况下 ,分条包裹的效果要优于整条包裹的效果 ,即碳纤维布在实际工程应用中有个利用效率的问题。将碳纤维布用量折换成等效箍筋用量 ,同时根据理论分析和试验结果提出了碳纤维布约束混凝土的受压应力 应变全曲线方程
Based on reasonably determining the tensile strength and modulus of elasticity for carbon fiber sheet(CFS),the compressive stress strain curve of concrete confined by CFS is also studied experimentally and analytically.The test results indicate that the confinement of CFS,which is similar to that of transverse reinforcement,can increase the ductility and compressive strength of concrete remarkably.It is also found that the confining effect of wrapping CFS strips is better than that of wrapping CFS fabric,when the quantity of CFS is constant.Based on the test data analyses,the compressive stress strain relationship of concrete confined by CFS is proposed.The calculating curves agree well with the experimental curves.

关键词(KeyWords): 碳纤维布;应力;应变
carbon fiber sheet; stress; strain

Abstract:

Keywords:

基金项目(Foundation): 国际合作研究项目! (日本文部省 No .10 0 45 0 5 5 );; 天津市青年科学基金! (No .99370 2 0 11)

作者(Author): 赵彤,谢剑,戴自强
Zhao Tong Xie Jian Dai Ziqiang

Email:

DOI: 10.19701/j.jzjg.2000.07.009

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