Keywords and Phrases
Buckling; Concrete; Element; FRP; Steel; Thin-Walled
“The hollow core Fiber-Reinforced-Polymer (FRP) concrete circular-steel (HC-FCS) column consists of an outer circular fiber reinforced polymer (FRP) tube, an inner thin-walled circular steel tube concentrically aligned, and a concrete shell between them. Research has been performed on the performance of the member as a whole, but to date, there has been no investigation into the behavior of the steel tube confined in the column. 17 small-scale columns were tested under axisymmetric axial compressions applied directly to the steel tube under displacement control. The conducted parametric study examined the effects of diameter-to-thickness (D/t) ratio, concrete unconfined compressive strength, FRP thickness, and concrete shell thickness. Ductility is improved in all cases with the concrete adding a positive second curve. Increasing the D/t ratio led to the column not reaching yield if D/t exceeded 118. Concrete strength and thickness had little effect on capacity. Finally, Increasing FRP thickness had a powerful influence on stiffness. The experimental tests were used to the development and validate a numerical model of a steel tube with an original end condition under axial compressive loading which will be used in future modeling of the HC-FCS column. A three-dimensional numerical model was developed using the software LS_DYNA to model local buckling of steel. Validation of the behavior, stiffness, and failure of the model was based upon tests performed on four thicknesses of steel with diameter-to-thickness ratios (D/t) ranging from 40 to 280”--Abstract, page iv.
Yan, Guirong Grace
Civil, Architectural and Environmental Engineering
M.S. in Civil Engineering
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Local Buckling of Axially Loaded Steel Tubes Confined by Concrete and FRP
- Numerical and Experimental Perturbation-Based Analysis of Thin-Walled Steel Tubes Buckling Under Compression
xii, 86 pages
© 2018 Nicholas Brian Colbert, All rights reserved.
Thesis - Open Access
Electronic OCLC #
Colbert, Nicholas, "Numerical and experimental analysis of local buckling of axially loaded steel tubes confined by concrete and FRP" (2018). Masters Theses. 8042.