An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams

Khagehhosseini A.H., Porhosseini R., Morshed R. and Eslami A. (2013) An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams. Structural Engineering and Mechanics, 47 2: 247-263. doi:10.12989/sem.2013.47.2.247

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Author Khagehhosseini A.H.
Porhosseini R.
Morshed R.
Eslami A.
Title An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams
Journal name Structural Engineering and Mechanics   Check publisher's open access policy
ISSN 1225-4568
1598-6217
Publication date 2013-07
Year available 2013
Sub-type Article (original research)
DOI 10.12989/sem.2013.47.2.247
Open Access Status
Volume 47
Issue 2
Start page 247
End page 263
Total pages 17
Place of publication Daejeon, Republic of Korea
Publisher Techno-Press
Collection year 2014
Language eng
Abstract It is evident that torsional resistance of a reinforced concrete (RC) member is attributed to both concrete and steel reinforcement. However, recent structural design codes neglect the contribution of concrete because of cracking. This paper reports on the results of an experimental and numerical investigation into the torsional capacity of concrete beams reinforced only by longitudinal rebars without transverse reinforcement. The experimental investigation involves six specimens tested under pure torsion. Each specimen was made using a cast-in-place concrete with different amounts of longitudinal reinforcements. To create the torsional moment, an eccentric load was applied at the end of the beam whereas the other end was fixed against twist, vertical, and transverse displacement. The experimental results were also compared with the results obtained from the nonlinear finite element analysis performed in ANSYS. The outcomes showed a good agreement between experimental and numerical investigation, indicating the capability of numerical analysis in predicting the torsional capacity of RC beams. Both experimental and numerical results showed a considerable torsional post-cracking resistance in high twist angle in test specimen. This post-cracking resistance is neglected in torsional design of RC members. This strength could be considered in the design of RC members subjected to torsion forces, leading to a more economical and precise design. Copyright
Keyword Cracking torque
FE analysis
Longitudinal rebars
Post-cracking torsional resistance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2014 Collection
 
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Created: Thu, 28 Nov 2013, 17:43:19 EST by System User on behalf of School of Civil Engineering