Matching The Design Of Hybrid Fiber Composites And An Experimental Study On Mechanical Behavior Of Strengthening Structures

To pre-existing structure of the detection testing and maintenance to strengthen reform has become the main of investment and development in some developed country civil construction. Carbon composite strengthening structures begin prevail in the early 1990s, as yet has deep and widespread. But for the present single fiber composite (FRP) to the strengthening efficiency of concrete structures is lower, make use of carbon fiber reinforced plastic (CFRP) high intensity and high elastic modulus, and glass fiber reinforced plastic (GFRP) have the nice elongation rates and cheap. Take various fiber reinforced plastic, coordination and having complementary advantages, both exert the carbon composite high intensity and high elastic modulus, overcome the low elongation rates and high price. The paper in the different sides of density of the alkali free glass fiber reinforced plastic and carbon fiber reinforced plastic hierarchical mixed together, forming the interlaminated hybrid fiber reinforced plastic, a study on mechanical behavior of interlaminated hybrid fiber reinforced plastic (HFRP) , strengthening structures optimization of the matching and the application of research in Strengthening concrete structures.In a comprehensive, on the basis of analysis the composition of HFRP and mechanical properties, selection of the economic and suitable, performance complementary match of CFRP and GFRP, one, from theoretical analysis study of t hybrid fiber reinforced plastic to the role of the mechanism, matching, tensile strength and the estimate method of elongation rates. On the other hand, based on design 10 group HFRP test of the tensile properties performance of comparative experiments, research the different sides of density, thickness, hybrid proportion for the effect of tensile properties and analysis. On the premise of ensure the tensile strength consistent, find out the most reasonable matching design scheme of the interlaminated hybrid fibers. At last discussions the interlaminated hybrid fiber reinforced plastic strengthening of concrete beams the working mechanism role of bending resistance and design method, compared with the strengthening effect of HFRP and CFRP. To interlaminated hybrid fiber reinforced plastic strengthening of concrete structures supply theoretical basis and technology means, at the same time the strengthening technology for the practical engineering applications offer the theoretical basis and technical advice.