Flexural rigidity EI of RC slender columns under axial force and bending of rectangular section for the moment magnifier meted

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Title: Flexural rigidity EI of RC slender columns under axial force and bending of rectangular section for the moment magnifier meted

Author(s): Bonet Senach, J.L.; Miguel Sosa, P.F.; Fernández Prada, M.A.

Publication: ACHE

Volume: 55

Issue: 231

Appears on pages(s): 35 - 48

Keywords:

Date: 1/1/2004

Abstract:
In this paper, a new expression is proposed for the flexure rigidity EI of RC slender columns under instantaneous and sustained axial force and bending, with rectangular cross-section, symmetrically reinforced in both axes, valid not only for normal strength concrete but for high strength concrete. The proposed expression has been derived from the results of a numeric simulation and has been checked against 238 experimental tests. This proposed expression has been compared with the ACI- 318 and EC-2 proposals. It has been observed a remarkable improvement in the accuracy with the proposed expression with regard to the proposed by both cases. The proposal allows verification and design of slender columns with enough accuracy for the professional practice. This method is applicable to an important percentage of columns in buildings.


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