Abstract
The performance of Concrete Filled Steel Tube (CFST) was investigated under the effect of Alkali-Silica Reaction damage and the confinement strengthening by Carbon Fiber Reinforced Polymer CFRP using the Nonlinear Finite Element Analysis (NLFEA) technique. A total of twenty-eight simulated models were utilized to examine the effect of CFRP strengthening (strengthened and un-strengthened), CFRP layers number (0, 5, 6, 7, 8, 9, and 10), and ASR damage level (0, 1, 2, and 3) were evaluated after a well validation against experimental work data from the literature. The hysteretic loop behavior, maximum load-carrying, and drift capabilities were also tackled. The column’s strengthening efficiency, stiffness, energy dissipation, steel, and CFRP strains at failure were evaluated under the combined effect of axial and cyclic loading. The findings indicated that strengthening CFST columns with CFRP wrapping at their ends reduced the local buckling phenomenon at the column's ends in the outward direction. Therefore, strengthened columns experienced higher strength and net drifting with higher energy absorption and performance factor, lower stiffness degradation, steel and CFRP strains. In addition, a total of 6, 7, and 8 CFRP layers is appropriate for restoring the original behavior after being exposed to ASR damage levels of 1, 2, and 3, respectively. It has been found that increasing the number of CFRP plates improves the load and its associated net drift capacity for all ASR levels. The maximum improvement percentages for ASR levels 0, 1, 2, and 3 are 55, 41, 30, and 12% for horizontal net drift and 48, 34, 26, and 11% for vertical net drift. In addition, strengthening with CFRP sheets increases the strain values by 2% for each additional layer regardless of its ASR stage. Generally, the findings of this study could be used to estimate the behavior of circular columns under ASR damage and CFRP strengthening effects.
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Data availability
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- ASR:
-
Alkali-silica reaction
- CFRP:
-
Carbon fiber-reinforced polymer
- NLFEA:
-
Nonlinear finite element analysis
- CFST:
-
Concrete-filled steel tube
- FRP:
-
Fiber reinforced polymer
- RC:
-
Reinforced concrete
- ANSYS:
-
Analysis of systems
- \({\beta }_{t}\) :
-
Shear transfer coefficient
- ASCE:
-
American society of civil engineering
- \({f}_{c}^{^{\prime}}\) :
-
Compressive strength of concrete
- \({f}_{t}\) :
-
Tensile strength of concrete
- ACI:
-
American concrete institute
- \({\varepsilon }_{50u}\) :
-
Strain value corresponding to a \(0.5{f}_{c}^{^{\prime}}\)
- \({\Delta }_{net}\) :
-
The maximum horizontal displacement
- P:
-
The maximum horizontal load
- SF:
-
Strength factor
- DF:
-
Deformation factor
- PF:
-
Performance factor
- EA:
-
Energy absorption
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The authors acknowledge the technical and financial support provided by the Jordan University of Science and Technology (JUST).
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Al-Rousan, R.Z., Alnemrawi, B.R. Cyclic Behavior of CFRP Confined Circular CFST Damaged by Alkali-Silica Reaction. Int J Civ Eng 21, 1159–1180 (2023). https://doi.org/10.1007/s40999-023-00820-w
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DOI: https://doi.org/10.1007/s40999-023-00820-w