关键词: 碳纤维, 加固, 力法

Abstract: This article analyses the new complex stress system of the carbon fiber reinforcement beam "steel beam-concrete-carbon fiber" and sets up the simplified mechanical model of the reinforcement beam system. It explains the reinforcement mechanism of the concrete beam by introducing the distribution coefficient of section moment. It also gives us the incidence formula which related to the material, geometric demension, steel area radio of the beam and the amount of carbon fiber, and we can get the moment which the concrete beam and the carbon fiber bears apart. The arthor also gives the reinforcement engineering of the prestressed hollow slab bridge which has the 3*80 m long span and located in one highway as an example,it surely improved that the carbon fiber reinforcement technology used for the bridge reinforcement engineering is easy and reliable.

Key words: carbon fiber, reinforcement, force method