STUDY ON BEARING CAPACITY OF CONCRETE COLUMN REINFORCED BY CFRP AND ANGLE STEEL
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摘要: 碳纤维和角钢约束混凝土可以显著提高其承载力和延性。在对已有的试验数据分析的基础上,研究碳纤维和角钢复合加固混凝土柱的约束机理和受力模型,引入有效约束区域的概念,分别提出碳纤维和角钢加固混凝土柱截面有效约束面积的计算方法。在此基础上,考虑碳纤维层数、角钢面积、纵向配筋、混凝土柱的截面形状等因素的影响,建立碳纤维和角钢复合加固方形混凝土柱的承载力计算模型。模型的计算结果与已有的试验数据吻合较好,并可为工程实践提供参考。Abstract: The bearing capacity and ductility can be obviously increased by the confinement of CFRP and angle steel.Based on the existing experimental data,the mechanical model and the confinement mechanism of concrete column reinforced by CFRP and angle steel are studied,the concept of effective confinement zone is introduced,and then the calculating method of effective confinement area of concrete column reinforced by CFRP or angle steel are respectively proposed.Therefore,the effect of CFRP layer,the area of angle steel,the rebar,and the shape of concrete column on bearing capacity are well considered,the calculating model for the bearing capacity of concrete column reinforced by CFRP and angle steel is established.The predictions of the model agree well with the experimental results,which may also provide the references for engineering practice.
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Key words:
- carbon fiber /
- angle steel /
- reinforcement /
- concrete column /
- bearing capacity
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