应用新型延性纤维增强聚合织物对混凝土梁的加固

An innovative, uniaxial ductile fiber-reinforced polymer (FRP) fabric has been researched, developed, and manufactured (in the ductility of the developed fabric has been investigated by strengthening and testing eight concrete beams under flexural load. Similar beams strengthened with currently available uniaxial carbon fiber sheets, fabrics, and plates were also tested to compare their behavior with those strengthened with the developed fabric. The fabric has been designed so that it has the potential to yield simultaneously with the steel reinforcement of strengthened beams and hence, a ductile plateau similar to that for the nonstrengthened beams can be achieved. The beams strengthened with the developed fabric exhibited higher yield loads and achieved higher ductility indexes than those strengthened with the currently available carbon fiber strengthening systems. The developed fabric shows a more effective contribution to the strengthening mechanism.