Title: Creep Model for Reinforced Concrete Columns

Author(s): Raed M. Samra

Publication: Structural Journal

Volume: 86

Issue: 1

Appears on pages(s): 77-82

Keywords: beams (supports); columns (supports); creep properties; deflections; reinforced concrete; serviceability; Structural Research

DOI: 10.14359/2661

Date: 1/1/1989

Abstract:
A rational approach for calculating the serviceability structural effects of creep on reinforced concrete columns and beams is proposed. The approach uses creep properties as input, exemplified by the creep coefficient, and produces deflections of members and stresses in concrete and steel as output. The approach defines an effective modulus of elasticity for the reinforced section and uses a trial-and-error approach for its solution. The application of the method is made simple by the use of a microcomputer. The results of a specific example, solved by means of this approach and compared with procedures given in the ACI Building Code (318M-83) and British Standards Institution Standard BS 8110, point toward good correlation and, considering the degree of uncertainty associated with the problem, confirm that the method is reasonably accurate.