混凝土双向板碳纤维布加固的受力性能研究

Load-bearing capability study of two-way reinforced concrete slabs reinforced with CFRP

为了给碳纤维布(CFRP)加固钢筋混凝土双向板设计提供理论依据,采用千斤顶加载,应变仪和百分表采集数据,进行了双向板的CFRP二次受力加固试验,证实了CFRP加固钢筋混凝土双向板是一种有效的加固方法,可以使板的承载力和刚度有很大的提高.通过试验结果与塑性铰线理论计算的对比,发现采用塑性铰线理论计算CFRP加固双向板的极限承载力时,中部刚性区域宽度须小于40cm,其计算结果才偏于安全.

In order to support the theory on designing the Reinforced Concrete (RC) two-way slabs reinforced with Carbon Fiber Reinforced Polymer (CFRP), the twice-loading reinforcing experiments with CFRP on two-way slabs were carried out, with jacks used for loading, and strain gauges and centigrade scales used for data collecting. The experiments prove that reinforcing the RC two-way slabs with CFRP is an effective method for reinforcement, which can greatly improve the carrying capability and rigidity of slabs. By comparing the experimental results with calculated ones obtained according to the Yield Line Method, it is found that only when the value in the rigid region is less than 40 cm, is the calculated result in safe range.