Title: Reliability of load-Deformation Estimate for High-Strength Reinforced Concrete Beams

Author(s): S. Otani and S. Nagai

Publication: Symposium Paper

Volume: 176

Issue:

Appears on pages(s): 179-196

Keywords: Beams (supports); cracking (fracturing); deformation; high-strength; concrete; loads forces; reinforced concrete; stiffness; tests

DOI: 10.14359/5899

Date: 10/1/1998

Abstract:
The applicability of methods, routinely used in Japan in evaluating the force-deformation relationship of normal reinforced concrete (RC) members, was examined for high-strength RC beams. The member end moment-rotation relationship was idealized into a trilinear relation with stiffness change at “cracking” and “yielding.” The routine methods overestimate significantly the observed initial stiffness and underestimate yield deformation. A wide scatter is reported in the observed cracking moment. Yield and ultimate resistance can be conservatively estimated by the routine procedure.