Effects of Uniform Load on Externally Post-tensioning Composite Beams under Multiple Degrees of Shear Connection

Composite beams (steel and concrete) are used widely as the main structural elements in flexure in bridges and buildings. Such structures' design life would be decreased if the loads increased or if environmental deterioration could occur. Such modifications can reduce the strength of these mem...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2022-05, Vol.1026 (1), p.12024
Main Authors: Hassanin, A I, Shabaan, H F
Format: Article
Language:English
Subjects:
Building design
Capacitance
Composite beams
Composite Beams External
Composite materials
Connectors
Environmental degradation
Finite element method
Finite Element Modelling
Flexing
Mathematical analysis
Mathematical models
Model accuracy
Partial Interaction
post-tension
Post-tensioning
Retrofitting
Shear
Slip
Steel beams
Structural members
Tendons
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Summary:Composite beams (steel and concrete) are used widely as the main structural elements in flexure in bridges and buildings. Such structures' design life would be decreased if the loads increased or if environmental deterioration could occur. Such modifications can reduce the strength of these members and therefore need to be considered for replacement or retrofitting.The current study presents an evaluation of the effect of shear connection with its different degrees from partial to full for the composite beams strengthened with post-tensioning tendons. It is known by design that the use of partial shear connection in composite beams requires that the sliding capacitance of the shear connectors shouldn’t be less than the maximum slip so that the composite section can reach the ultimate design load. The degree of shear connection over which the composite section is designed, as well as the span length of the beam, are the most important factors governing the maximum slip limit. This study was performed using numerical modelling by the finite element analysis method to simulate the bending behaviour of composite steel beams under uniform loading cases which were strengthened with three shapes of tendons profiles. The results of two finite element models have been compared with experimental results obtained from previous literature related to the same topic. This comparison was made to ensure the efficiency, effectiveness, and accuracy of the model used, using ANSYS Workbench Software.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1026/1/012024