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Numerical Modelling and Analysis on Structural Behaviour of Composite Slim-Floor Beams

Xu, Xinxin
Publication Date
End of Embargo
Supervisor
Dai, Xianghe
Lam, Dennis
Keywords
Composite slim floor beams, Concrete dowel shear connector, Finite element analysis, Parametric study, Simple resistance prediction method, Structural behaviour, Modelling
Rights
Creative Commons License
The University of Bradford theses are licenced under a Creative Commons Licence.
Peer-Reviewed
Open Access status
Accepted for publication
Institution
University of Bradford
Department
School of Built Environment, Architecture & Creative Industries. Faculty of Engineering and Digital Technologies
Awarded
2024
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Theses
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PhD Thesis
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Abstract
This thesis aims to investigate the behaviour of composite slim-floor beams based on numerical modeling and analysis. This dissertation summaries the developments and prospects of composite floor beams, includes investigation of push-out tests, shear beam tests, flexural beam tests. The most important result in this research includes two main parts. Part 1: Based on push out tests of shear connectors, FE model developed and validated, parameter study conducted, and a simple design calculation method (the Correlation Strain Method and the Direct Stress Method) is proposed to predict the load bearing capacity of concrete dowel shear connector. Part 2: Based on test results of shear beams and flexural beams, FE models developed and validated, and parametric studies were carried out. According to FE results, the shear (in a weak cross-section) and bending resistance prediction methods (stress block method) with related classifications and limitations were proposed. The validity and accuracy of both the finite element (FE) models and simple predictive methods were verified. In both shear connector and beam studies, the mechanical behaviour and effective parameters of composite beam were explained in detail based on the FE parametric studies, that cover concrete strength, diameter of concrete dowel, diameter of reinforcement rebar passing through the concrete dowel, and even the shear connection degree in the flexural beam.
URI
https://bradscholars.brad.ac.uk/handle/10454/20736
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Type
Thesis
Qualification name
PhD
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