الفهرس 
Torsional Behavior Of Reinforced Concrete Box Section Beams
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Abstract
A numerical study is conducted in order to study the behavior of the reinforced concrete hollow sections under pure torsion. Several parameters are studied. These parameters are divided into 6 different groups. Firstly, the effect of the concrete compressive strength in the beam behavior is studied in a group of 5 different models. Secondly, the effect of the yield stress of the reinforcement bars is studied in a group of 4 models. Thirdly, changing the transverse reinforcement ratio effect in the beam behavior is studied in a group of 5 models. Fourthly, A group of 5 models in order to study the change in beam behavior due to changing the cross-section wall thickness. Fifthly, the effect of adding upper flange to the beam cross section is studied in a group of 4 models. Finally, Changing the cross section from rectangle to square is the last parameter to study. This group contains 4 models. After analyzing all of these models, the results are compared firstly with experimental results. In order to ensure the validity of the theoretical models for ANSYS. Secondly, the results are compared with the manual calculations according to some international codes equations as ACI-318-19, ECP2018, and EN1992-1-2004