Shear strength of reinforced concrete beams with a fiber concrete matrix

Canadian Journal of Civil Engineering - Tập 33 Số 6 - Trang 726-734 - 2006
Fariborz Majdzadeh, Sayed Mohamad Soleimani, Nemkumar Banthia

Tóm tắt

The purpose of this study was to investigate the influence of fiber reinforcement on the shear capacity of reinforced concrete (RC) beams. Both steel and synthetic fibers at variable volume fractions were investigated. Two series of tests were performed: structural tests, where RC beams were tested to failure under an applied four-point load; and materials tests, where companion fiber-reinforced concrete (FRC) prisms were tested under direct shear to obtain material properties such as shear strength and shear toughness. FRC test results indicated an almost linear increase in the shear strength of concrete with an increase in the fiber volume fraction. Fiber reinforcement enhanced the shear load capacity and shear deformation capacity of RC beams, but 1% fiber volume fraction was seen as optimal; no benefits were noted when the fiber volume fraction was increased beyond 1%. Finally, an equation is proposed to predict the shear capacity of RC beams.Key words: shear strength, fiber-reinforced concrete, RC beam, stirrups, energy absorption capacity, steel fiber, synthetic fiber.

Từ khóa


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Thông tin
Thông tin xuất bản

Canadian Journal of Civil Engineering

Tập 33 Số 6

726-734

Thông tin tác giả