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- Confinement effect and stress-strain model for concrete of multi-cell . . .
Furthermore, leveraging the modified confinement effect coefficient proposed in this study, in conjunction with calculation method outlined in GB 50936, an effective method to predict axial capacity of MC-CFST column was established, demonstrating a higher accuracy in prediction
- Frontiers | Confinement Effect of Concrete-Filled Steel Tube Columns . . .
The index of equivalent confining pressure was used to quantify the level of passive confinement provided by the steel tube in CFST columns Based on the test results, a method to quickly quantify the confining pressure provided by the steel tube was proposed
- Research on the confinement mechanism and calculation method of axial . . .
Therefore, based on the confinement mechanisms of square steel tubes and steel reinforcements on concrete, this paper calculates the effective lateral confining stress to determine the strength enhancement factors for concrete in various confined regions
- Simplified Modeling of Concrete Confinement
Equivalent Confining Pressure for square cross sections The evaluation of different contributions of confining stresses not uniform and variable in the two transverse directions allows to develop a refined model accounting for the meshing of the cross section and point wise evaluation
- Mechanism-based unified design formula for axially loaded CFST columns . . .
Motivated by the research gap, this study developed a mechanism-based unified design formula suitable for CFST columns with various profiles This study was based on a theoretical analysis of circle profiles, through which the relationship between confining stress and cross-section geometric material parameters was established
- Refinement of unified design formula for CFST stub columns under axial . . .
A general formulation of the unified design formula for CFST stub columns with various profiles was established, with which institutions and researchers can develop customized theoretical formulas
- Inside to outside confinement effects and sectional load-bearing . . .
This leads to local buckling of the steel tube, preventing full utilization of the steel's strength Therefore, compared to circular CFST columns with the same cross-sectional area, square CFST columns have lower load-bearing capacity and ductility, which somewhat limits their application
- A unified formulation for circle and polygon concrete-filled steel tube . . .
Eq (2-8) proposes an equivalent system that requires introduction of an effectiveness coefficient that accounts for the effect of the hollow and polygonal section profile on the confining pressure
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