Highstrength concrete (structural) / New material & Construction (structural)

[2225] SHEAR BEHAVIOR OF UFC-RC HYBRID BEAMS WITH PBO FIBER

Chihhsuan CHANG¹, Takuro NAKAMURA², Shinichi USUBA³, Junichiro NIWA² (1.Tokyo Institute of Technology 2.東京工業大学 3.NIPPON CONCRETE INDUSTRIES CO., LTD.)

Keywords:bond stress, fiber length, hybrid beam, PBO, shear capacity, UFC, volume content of fiber

The UFC is a cementitious composite reinforced by fiber with excellent properties. And PBO has the highest tensile strength among the organic fibers. This study is aimed to use PBO fiber reinforced UFC to strengthen the RC beams. And it investigates the shear behavior of UFC-RC hybrid beams with the parameters of different kinds of fiber. In addition, the method for evaluating the shear capacity of UFC-RC hybrid beams was proposed. The calculated values showed good agreement with the experimental results.