A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Length on Strength of CFST Columns
https://orcid.org/http://orcid.org/0009-0002-6407-313X
https://orcid.org/http://orcid.org/0000-0001-5178-8334
Concrete-Filled Steel Tube (CFST) columns have gained prominence in past two decades. But it is observed that, majority of the research work was concentrated on the stub CFST column. When the length of the column increases, failure of column changes from crushing to global buckling, hence it is required to study the effect of length on the strength of the CFST column. The main aim of the current paper is to investigate the effect of varying length on strength of slender CFST columns with varying confinement effect for the combination of high strength and normal strength material grades of steel and concrete. A finite element (FE) based study is performed on 48 slender CFST columns having length to external diameter (L/D) ratio of 10 and 20. CFST columns of diameter (D) of 250 mm and 350 mm with diameter to tube thickness (D/t) ratio of 25 and 40 are used for study. Concrete grades C30/37, C60/75 and steel grades S235, S550, S690 are used to study the effect of combinations of normal and high strength materials on strength of slender CFST columns. Standard hinge-roller boundary condition is considered for all FE analysis. Linear buckling analysis is performed to obtain the buckling modes of the CFST columns which then is used for perturbrating the geometry for performing the nonlinear buckling analysis to achieve the global failure mechanism. Column strength, load-deformation curves, deformation pattern and effect of confinement under varying length is evaluated. Strength of CFST columns obtained from the FE analysis is compared with the code predicted strength from EN 1994-1-1:2004 (EC4) and ANSI/AISC 360-05(AISC) provisions to examine their suitability for above considered geometric and material parameters.
Effect of Length on Strength of CFST Columns
https://orcid.org/http://orcid.org/0009-0002-6407-313X
https://orcid.org/http://orcid.org/0000-0001-5178-8334
Concrete-Filled Steel Tube (CFST) columns have gained prominence in past two decades. But it is observed that, majority of the research work was concentrated on the stub CFST column. When the length of the column increases, failure of column changes from crushing to global buckling, hence it is required to study the effect of length on the strength of the CFST column. The main aim of the current paper is to investigate the effect of varying length on strength of slender CFST columns with varying confinement effect for the combination of high strength and normal strength material grades of steel and concrete. A finite element (FE) based study is performed on 48 slender CFST columns having length to external diameter (L/D) ratio of 10 and 20. CFST columns of diameter (D) of 250 mm and 350 mm with diameter to tube thickness (D/t) ratio of 25 and 40 are used for study. Concrete grades C30/37, C60/75 and steel grades S235, S550, S690 are used to study the effect of combinations of normal and high strength materials on strength of slender CFST columns. Standard hinge-roller boundary condition is considered for all FE analysis. Linear buckling analysis is performed to obtain the buckling modes of the CFST columns which then is used for perturbrating the geometry for performing the nonlinear buckling analysis to achieve the global failure mechanism. Column strength, load-deformation curves, deformation pattern and effect of confinement under varying length is evaluated. Strength of CFST columns obtained from the FE analysis is compared with the code predicted strength from EN 1994-1-1:2004 (EC4) and ANSI/AISC 360-05(AISC) provisions to examine their suitability for above considered geometric and material parameters.
Effect of Length on Strength of CFST Columns
https://orcid.org/http://orcid.org/0009-0002-6407-313X
https://orcid.org/http://orcid.org/0000-0001-5178-8334
Concrete-Filled Steel Tube (CFST) columns have gained prominence in past two decades. But it is observed that, majority of the research work was concentrated on the stub CFST column. When the length of the column increases, failure of column changes from crushing to global buckling, hence it is required to study the effect of length on the strength of the CFST column. The main aim of the current paper is to investigate the effect of varying length on strength of slender CFST columns with varying confinement effect for the combination of high strength and normal strength material grades of steel and concrete. A finite element (FE) based study is performed on 48 slender CFST columns having length to external diameter (L/D) ratio of 10 and 20. CFST columns of diameter (D) of 250 mm and 350 mm with diameter to tube thickness (D/t) ratio of 25 and 40 are used for study. Concrete grades C30/37, C60/75 and steel grades S235, S550, S690 are used to study the effect of combinations of normal and high strength materials on strength of slender CFST columns. Standard hinge-roller boundary condition is considered for all FE analysis. Linear buckling analysis is performed to obtain the buckling modes of the CFST columns which then is used for perturbrating the geometry for performing the nonlinear buckling analysis to achieve the global failure mechanism. Column strength, load-deformation curves, deformation pattern and effect of confinement under varying length is evaluated. Strength of CFST columns obtained from the FE analysis is compared with the code predicted strength from EN 1994-1-1:2004 (EC4) and ANSI/AISC 360-05(AISC) provisions to examine their suitability for above considered geometric and material parameters.
Effect of Length on Strength of CFST Columns
Lecture Notes in Civil Engineering
Kumar, Ratnesh (editor) / Bakre, Sachin V. (editor) / Goel, Manmohan Dass (editor) / Chitlapally, Shiva Sai (author) / Khatri, Ashish P. (author)
Structural Engineering Convention ; 2023 ; Nagpur, India
2024-11-24
14 pages
Article/Chapter (Book)
Electronic Resource
English
Shape effect on axially loaded high strength CFST stub columns
| British Library Online Contents | 2018
Experimental and Numerical Investigations of Bolted CFST Beams–CFST Columns Connections
| Springer Verlag | 2018
Prediction of the plastic hinge length for square CFST stocky columns
| Elsevier | 2022
Nonlinear ANN Modeling for Predicting Ultimate Strength of CFST Columns
| Springer Verlag | 2024