外贴碳纤维布加固钢筋混凝土空心板现场对比性试验研究

Study of Field Comparative Tests of Reinforced Concrete Hollow Slabs Strengthened with Bonded CFRP Texture

为深入研究碳纤维布加固钢筋混凝土梁的效果,结合湖北省某高速公路某既有桥梁加固工程,在其空心板底面粘贴2层碳纤维布进行了加固前后的对比试验。结果表明,粘贴碳纤维布可显著降低空心板应力,增加抗弯刚度,有效抑制混凝土开裂。

To further study the effect of reinforced concrete girders strengthened with bonded carbon fiber reinforced polymer （CFRP） texture, the authors in this paper conduct field comparative tests for the girders of an existing bridge on an expressway in Hubei Province before and after the bottom of the hollow slabs of the girders is strengthened with two layers of the bonded CFRP texture. The results of the tests and study indicate that the texture can obviously reduce the stress level of the hollow slabs, enhance flexural rigidity and efficiently suppress concrete cracking.