CFRP加固钢筋混凝土双向板抗裂性分析

Analysis on Crack Resistance of Two-way Reinforced Concrete Slabs Strengthened with CFRP Sheets

对简支条件下受均布荷载作用的CFRP布加固钢筋混凝土双向板进行了试验研究,并对其抗裂性能进行了理论分析,以Gergely和Nawy-Orenstein等人提出的钢筋混凝土双向板裂缝计算公式为基础,提出了正常使用阶段CFRP布加固钢筋混凝土双向板的最大裂缝宽度计算模型。计算结果表明,理论计算结果与试验值吻合较好,计算模型具有较好的精度。

This study investigates the two-way reinforced concrete slabs strengthened with externally bonded CFRP sheets,which is subject to uniform load under the simply supported conditions.An analytical study concerning the crack resistance was conducted,the calculating mode of the maximum crack width are established about the reinforced concrete slabs based on the calculating mode put forward by Gergely and Nawy-Orensteinnd.The results show that the value from this calculation formula is in good agreement with the experiment data,and the crack width formula has higher precision.