Behaviour Model And Experimental Study For
The Torsion Of Reinforced Concrete Members
Author(s)
C. E. Chalioris
Abstract
The typical behavioural curve of a reinforced concrete element with longitudinal
bars and stirrups under torsion comprises two distinct regions; the elastic part
until the first cracking and the part after cracking. The different character of the
response in these regions reveals the different nature of the load resisting
mechanism in each case. The present work addresses an approach that combines
two different analytical models in order to predict the entire torsional behaviour.
The prediction of the elastic part until the first cracking is achieved using a
smeared crack analysis for plain concrete in torsion, whereas for the description
of the post-cracking response the softened truss model is used. Further, the
results of an experimental investigation on the behaviour of 15 reinforced
concrete beams subjected to pure torsion are also presented in this paper. The
reported results include the behavioural curves and the values of the initial
torsional stiffness, the cracking torque moment and the ultimate torque capacity
of the beams. Analyses for the torsional behaviour of the tested beams using the
proposed approach were performed and analytical curves are produced and
compared with the experimental ones. A good agreement between predicted and
experimental results is observed.
Keywords: beams, reinforced concrete, smeared crack model, softened truss
model, torsion, tests.
1 Introduction
Several theoretical and experimental researches have emphasized the differences
between the pre-cracking and post-cracking behaviour of reinforced concrete
members in pure torsion [1]. The first, pre-cracking part is characterized by the
Keywords
beams, reinforced concrete, smeared crack model, softened truss
model, torsion, tests.
Related Book
Other papers in this volume
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