（1 长安大学基建处， 西安 710064； 2 长安大学建筑工程学院， 西安 710061）

［摘要］采用统一强度理论，对碳纤维布(CFRP)和角钢复合加固钢管混凝土叠合柱的轴心受压机理和约束模型进行分析，考虑CFRP和角钢材料的特点及其对混凝土的约束作用，提出了复合加固钢管混凝土叠合柱的轴心受压承载力计算公式，并进行有限元数值模拟，将公式计算结果与有限元计算结果进行对比，验证了该计算公式的正确性，并得出CFRP厚度、角钢套箍指标以及统一强度理论参数b等因素对承载力的影响规律。该结果为此类复合加固钢管混凝土叠合柱轴心受压承载力的计算提供了一定的理论依据。

［关键词］统一强度理论； 钢管混凝土叠合柱； 碳纤维布； 角钢； 复合加固

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2018)17-0096-08

Analysis of axial compression bearing capacity of CFRP and angle steel composite reinforced concrete-filled steel tubular columns

Dai Yan1,2, Zhao Junhai2, Zhang Changguang2

(1 Department of Infrastructure Management, Chang′an University, Xi′an 710064, China; 2 School of Civil Engineering, Chang′an University, Xi′an 710061, China)

Abstract:The axial compression mechanism and constraint model of carbon fiber reinforced plastic(CFRP) and angle steel composite reinforced concrete-filled steel tubular columns were analyzed by unified strength theory. Considering the material characteristics of CFRP and angle steel and their restraining effects on concrete, the calculation formulae of axial compression bearing capacity of composite reinforced concrete-filled steel tubular columns was proposed and finite element numerical simulation was carried out. The comparisons between the calculation results and finite element calculations were carried out and the correctness of the theory formulae was verified. The effects rules of  CFRP thickness, hoop index of angle steel and  parameter b in the unified strength theory were obtained. The results provide a theoretical basis for the calculation of such composite reinforced concrete-filled steel tubular columns strengthened with both CFRP and angle steel.

Keywords:unified strength theory; concrete-filled steel tube reinforced concrete column; carbon fiber reinforced plastic(CFRP); angle steel; combination strengthening

*国家自然科学基金项目（41202191，51508028），陕西省社会发展科技攻关项目（2015SF272），陕西省自然科学基础项目（2015JM4146），长安大学中央高校基本科研业务费专项基金项目（2014G1281071， 310826161007）。

作者简介：代岩，硕士，助理工程师，Email: daiyan1211@163.com。