Deflection and Cracking of High-Strength Concrete Beams and Slabs

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Title: Deflection and Cracking of High-Strength Concrete Beams and Slabs

Author(s): H. Lambotte and Luc R. Taerwe

Publication: Special Publication

Volume: 121

Issue:

Appears on pages(s): 109-128

Keywords: beams (supports); concrete slabs; cracking (fracturing); tension; crack width and spacing; deflection; flexural strength; high-strength concretes; modulus of elasticity; stiffness; tests; Structural Research

Date: 11/1/1990

Abstract:
Six reinforced concrete beams and four slabs with different reinforcement ratios were tested to failure. The behavior of specimens manufactured with normal strength concrete (fc = 36 MPa) and high-strength concrete (fc = 83 MPa) was compared with respect to cracking and deflections. It was found that crack widths and crack spacings were fairly comparable for both concrete types in the region of stabilized cracking. Deflections decreased by using high-strength concrete due to the increased modulus of elasticity and cracking moment. However, for the beams, this gain diminishes at higher load levels.