Load Carrying of Eccentrically Loaded Reinforced Concrete Panels under Sustained Load

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Title: Load Carrying of Eccentrically Loaded Reinforced Concrete Panels under Sustained Load

Author(s): E. Z. Tatsa

Publication: Structural Journal

Volume: 86

Issue: 2

Appears on pages(s): 150-155

Keywords: columns (supports); concrete panels; creep properties; deformation; eccentric loads; loads (forces); reinforced concrete.

Date: 3/1/1989

Abstract:
A long-term loaded reinforced concrete panel undergoes deformations due to shrinkage and creep effects. The deformations due to shrinkage are assumed to be distributed uniformly for symmetrical reinforcement and thus do not cause additional curvature to that developed at loading. The creep deformations vary along the column, increasing the initial eccentricity in different sections of the element. The phenomenon, which is of a progressive nature with an accumulating effect, lasts as long as creep deformations develop and may cause a considerable reduction of the bearing capacity, The paper reports a series of tests carried out on 1.9 scale model columns and proposes a numerical procedure suitable for computer programming. The method is based on a linear creep assumption and takes into consideration the time-dependent changes (aging) of the material properties.