CFRP加固混凝土柱在重复荷载作用下的性能研究

Experimental Research on Properties of Concrete Column Strengthened with CFRP under Repeating Load

以深圳市黄山岗立交维修项目A匝道曲线桥为研究对象 ,采用碳纤维布不同的粘贴方式对加固的 4根钢筋混凝土柱进行重复荷载试验 ,研究了试件在重复荷载作用下的性能 .试验结果表明 ,应用碳纤维复合材料加固混凝土结构 ,不仅能有效提高混凝土结构的抗重复荷载能力 ,延长结构的低周疲劳寿命 ,而且大大改善了混凝土柱的延性 .

Taking into account a curvilinear cloverleaf junction in Shenzhen City and through the experiments with four reinforced concrete columns strengthened with Carbon Fiber Reinforced Plastic (CFRP) sheets in different orientation, we studied the property of concrete columns strengthened with CFRP under repeating load. The experimental results showed that CFRP could improve effectively not only the fatigue bearing capacity of concrete column, but also the ductility of concrete column greatly. In addition, some propositions are put forward about the technique of sticking CFRP sheets and the conclusions obtained in the paper have some reference values to strengthen the practical engineering.