Monotonic property of steel–RC composite beams strengthened with externally pre-stressed tendons

This study presents an experimental investigation on composite beams (CB) to explore the effectiveness of adding external post-tensioning (EPT) force, as a strengthening technique, on the monotonic flexural performance of composite samples. Two experiments on CB were conducted under three-point load...

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Bibliographic Details
Published inCanadian journal of civil engineering Vol. 49; no. 7; pp. 1173 - 1183
Main Authors El-Zohairy, Ayman, Alsharari, Fahad, Salim, Hani, Arafa, Ibrahim T., Nawar, Mahmoud T.
Format Journal Article
LanguageEnglish
Published 1840 Woodward Drive, Suite 1, Ottawa, ON K2C 0P7 Canadian Science Publishing 01.07.2022
NRC Research Press
Canadian Science Publishing NRC Research Press
Subjects
Analysis
Composite beams
Composite materials
Concrete slabs
Dynamic testing
experimental
expérimental
Fatigue
Fatigue testing machines
finite element
Finite element method
High strength steels
Materials
Materials fatigue
Metal fatigue
Methods
monotone
monotonic
Optimization
post tension
Post-tensioning
poutres composites en acier et en béton
Reinforced concrete
Reinforcing steels
Slabs
Steel
steel and concrete composite beams
Steel beams
Tendons
Tension
Ultimate tensile strength
élément fini
United States
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Summary:This study presents an experimental investigation on composite beams (CB) to explore the effectiveness of adding external post-tensioning (EPT) force, as a strengthening technique, on the monotonic flexural performance of composite samples. Two experiments on CB were conducted under three-point loading. High-strength steel strands post-tensioned to 46% of the ultimate strength were used to apply the EPT. Moreover, a finite element (FE) model is developed to present numerical investigations on the monotonic and fatigue behaviors of the CB with and without EPT by considering the slip between the concrete slabs and steel beams as well as the fatigue deterioration in the concrete slabs. A FE parametric study is conducted using the proposed FE model to investigate the effect of steel beam grade, tendon eccentricity, span-to-depth ratio, and fatigue loading. The optimum span-to-depth ratio to obtain the maximum contribution of the EPT force in improving the CB capacities is 9.0.
ISSN:0315-1468
1208-6029
DOI:10.1139/cjce-2021-0237