Carbon fiber-reinforced polymer(CFRP)has been widely used in structural strengthening due to its light weight,high strength and anti-corrosion.Specifically,in strengthening RC beams,various strengthening techniques,such as external bonding,near-surface mounting and prestressing,have been de-veloped so far.However,due to the brittle nature of the CFRP material and the interface of concrete bond-ed with CFRP plates,strengthened beams used to exhibit brittle failure at low ductility.Therefore,a novel strengthening method with high ductility and prestressed CFRP plates was proposed based on previous find-ings on the mid-span-supported strengthening technique by changing the mid-span deviators to elastic-plas-tic devices.The effectiveness of the proposed strengthening method was verified by finite element analysis.The finding indicated the new method could maintain the CFRP at a high stress level and increase the ulti-mate deflection up to 137%in limited loss of ultimate strength.The results could be reference to further de-velopment of structural strengthening methods.
关键词
CFRP/预应力/加固/混凝土梁/延性/有限元分析
Key words
CFRP/prestress/strengthening/concrete beams/ductility/finite element analysis
维普
万方数据