Nonlinear Analysis Of Reinforced Concrete Beams Bonded With Carbon Fiber

Those years, more and more existing buildings are transformed to pursue rational use ofthe building features. Construction techniques and materials, a variety of high-strengthmaterials are emerging and structural reinforcement methods have continued to increase bythis trend influence. But carbon fiber material as the new building materials with theadvantages of economic,efficient, high, strength, simple construction are widely used bydesigners. In this paper, there are analysis of secondary beams which had been increased largeload in the renovation of a large mall. The bearing capacity of beam were checked based onincreasing load and the beams should be reinforced. The second beams should beconcentrated opening holes and anchored with high-strength anchor bolt,but those would leadto stress concentration at the local of the beams, so nonlinear analysis of beams withconcentration openings were studied by ABAQUS. The results as follows: the local stressconcentration at the opening of the beam was obvious and the stiffness and ultimate bearingcapacity of beams were decreased; carbon fiber reinforcement of the secondary beams werecalculated considering the effect of openings and increasing load to bearing capacity. At last,the method of numerical simulation were used to analyze the different between the originalbeams and reinforced beams. It proved that carbon fiber reinforcement could increase thebearing capacity of the secondary beams obviously and the reinforced beams could satisfyoperating requirements. But the carbon fiber reinforcement affected the deflection of beamsvery little and the load when the reinforced beams appeared cracks was increased.