Effect of Loading Type on the Effective Moment of Inertia of Reinforced Concrete Beams

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Title: Effect of Loading Type on the Effective Moment of Inertia of Reinforced Concrete Beams

Author(s): Rajeh Z. Al-ZaidD, Abdulrahman H. Al-Shaikh, and Mustafa M. Abu-Hussein

Publication: Structural Journal

Volume: 88

Issue: 2

Appears on pages(s): 184-190

Keywords: beams (supports); deflection; load-deflection curve; loads (forces); moments of inertia; reinforced concrete; Structural Research

Date: 3/1/1991

Abstract:
The deflection of cracked reinforced concrete beams tested under various types of loading is investigated, and the effect of the type of loading on their effective moment of inertia is discussed. Four types of loading were considered in this study, which include: midspan and third-point concentrated loads, uniformly distributed load, and a combination of midspan concentrated and uniformly distributed loads. The value of the effective moment of inertia was found to be significantly affected by the type of loading used. Therefore, to account for such an effect, a newly developed model for estimating the effective moment of inertia of cracked reinforced concrete beams under any type of symmetrical loading is proposed.