Carbon Fiber Reinforced Concrete Column Test And Numerical Simulation Study

Concrete structures strengthening with CFRP technology has high value in our country, and it can promote concrete structures'strength and ductility. At present, many universities, scientific research administrations, civil engineering groups and institutes dive into huge ardor and interesting to do this job. In 2003,Chinese carbon fiber techniccommittee had promulgated Technical specification for strengthening concrete structures with carbon fiber reinforced polymer laminate, but this technical specification is not perfect with the seismic behavior of concrete column. So this subject does shake table research about CFRP strengthening concrete column.This test does four single layer flat-slab floor constructions. The frist model is wrapped transverse and vertical CFRP. At first, inputting single direction seismic EL-Centro (N-S) waves, which have different acceleration peak after, sticking one layer vertical CFRP sheet on the two sides of column, which perpendicular to seismic wave inputting direction ,use to improving column's flexural rigidity, and sticking two layer transverse CFRP sheets use to improving column's ductility. Inputting single the same direction seismic EL-Centro (N-S) waves, which have different acceleration peak, through displacement gauge and accelerometer measure displacement and acceleration of shaking table and the top of model.Other three medols, which difference layer numbers CFRP, study on strengthened columns'ductility by inputting single direction seismic EL-Centro (N-S) waves, through displacement gauge and accelerometer measure displacement and acceleration of shaking table and the top of model. At last, the model stiffness and CFRP layers test cuver are obtained by test result analysising to study ductility and flexural rigidity of concrete columns strengthening with CFRP.When this test is finished, processing test dates with MATLAB7.0 to get rela-tively true test covers, these dates include acceleration-time curves and displacement-time curves. Though analyzing test dates, we can get that vertical CFRP sheet can be well improving column's flexural rigidity and transverse CFRP can be well improving column's ductility.Finally, a complete numerical simulation of natural frequency and time history analysis are performed for this test process with ANSYS10.0 and the simulated results about displacement time curves are in good agreement with those from experiments.