Shear Performance of FRCC Beam-Column Joints Using Various Polymer Fibers

摘要

cqvip:Brittle shear failure should be avoided in beam-column joint of a reinforced concrete(RC)frame during the earthquake.Fiber-reinforced cementitious composite(FRCC)which presents a remarkable deformability especially under tensile and bending load with a large energy absorption capacity is expected to be used in the crucial part of a RC frame.With the development of polymer material,various synthetic fibers have become the best selection to improve concrete capacity and failure resistance without the corrosion of fibers.The objective of this study is to investigate the influence of fiber bridging effect on the shear capacity of FRCC beam-column joint.The main parameter of the test in the present study is the fiber types:aramid,polypropylene(PP)and polyvinyl alcohol(PVA)fiber.To evaluate shear capacity quantitatively,a new calculation method using FRCC tensile characteristics confirmed by the uniaxial tension test is newly proposed.The difference of below 7%between calculated value and experimental value demonstrates that the calculation method is feasible.