Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns

To investigate the applicability of the methods for calculating the bearing capacity of high-strength steel-reinforced concrete (SRC) composite columns according to specifications and the effect of confinement of stirrups and steel on the bearing capacity of SRC columns. The axial compression tests...

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Autores principales:	Jun Wang, Yuxin Duan, Yifan Wang, Xinran Wang, Qi Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	high-strength steel steel-reinforced concrete column axial bearing capacity confinement effect simulation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/07b8ded2efb3462a85019939714ff98f
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spelling	oai:doaj.org-article:07b8ded2efb3462a85019939714ff98f2021-11-25T18:14:12ZAnalysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns10.3390/ma142268601996-1944https://doaj.org/article/07b8ded2efb3462a85019939714ff98f2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6860https://doaj.org/toc/1996-1944To investigate the applicability of the methods for calculating the bearing capacity of high-strength steel-reinforced concrete (SRC) composite columns according to specifications and the effect of confinement of stirrups and steel on the bearing capacity of SRC columns. The axial compression tests were conducted on 10 high-strength SRC columns and 4 ordinary SRC columns. The influences of the steel strength grade, the steel ratio, the types of stirrups and slenderness ratio on the bearing capacity of such members were examined. The analysis results indicate that using high-strength steel and improving the steel ratio can significantly enhance the bearing capacity of the SRC columns. When the slenderness ratio increases dramatically, the bearing capacity of the SRC columns plummets. As the confinement effect of the stirrups on the concrete improves, the utilization ratio of the high-strength steel in the SRC columns increases. Furthermore, the results calculated by AISC360-19(U.S.), EN1994-1-1-2004 (Europe), and JGJ138-2016(China) are too conservative compared with test results. Finally, a modified formula for calculating the bearing capacity of the SRC columns is proposed based on the confinement effect of the stirrups and steel on concrete. The results calculated by the modified formula and the finite element modeling results based on the confinement effect agree well with the test results.Jun WangYuxin DuanYifan WangXinran WangQi LiuMDPI AGarticlehigh-strength steelsteel-reinforced concrete columnaxial bearing capacityconfinement effectsimulation analysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6860, p 6860 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-strength steel steel-reinforced concrete column axial bearing capacity confinement effect simulation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	high-strength steel steel-reinforced concrete column axial bearing capacity confinement effect simulation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Jun Wang Yuxin Duan Yifan Wang Xinran Wang Qi Liu Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
description	To investigate the applicability of the methods for calculating the bearing capacity of high-strength steel-reinforced concrete (SRC) composite columns according to specifications and the effect of confinement of stirrups and steel on the bearing capacity of SRC columns. The axial compression tests were conducted on 10 high-strength SRC columns and 4 ordinary SRC columns. The influences of the steel strength grade, the steel ratio, the types of stirrups and slenderness ratio on the bearing capacity of such members were examined. The analysis results indicate that using high-strength steel and improving the steel ratio can significantly enhance the bearing capacity of the SRC columns. When the slenderness ratio increases dramatically, the bearing capacity of the SRC columns plummets. As the confinement effect of the stirrups on the concrete improves, the utilization ratio of the high-strength steel in the SRC columns increases. Furthermore, the results calculated by AISC360-19(U.S.), EN1994-1-1-2004 (Europe), and JGJ138-2016(China) are too conservative compared with test results. Finally, a modified formula for calculating the bearing capacity of the SRC columns is proposed based on the confinement effect of the stirrups and steel on concrete. The results calculated by the modified formula and the finite element modeling results based on the confinement effect agree well with the test results.
format	article
author	Jun Wang Yuxin Duan Yifan Wang Xinran Wang Qi Liu
author_facet	Jun Wang Yuxin Duan Yifan Wang Xinran Wang Qi Liu
author_sort	Jun Wang
title	Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
title_short	Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
title_full	Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
title_fullStr	Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
title_full_unstemmed	Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns
title_sort	analysis and modification of methods for calculating axial load capacity of high-strength steel-reinforced concrete composite columns
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/07b8ded2efb3462a85019939714ff98f
work_keys_str_mv	AT junwang analysisandmodificationofmethodsforcalculatingaxialloadcapacityofhighstrengthsteelreinforcedconcretecompositecolumns AT yuxinduan analysisandmodificationofmethodsforcalculatingaxialloadcapacityofhighstrengthsteelreinforcedconcretecompositecolumns AT yifanwang analysisandmodificationofmethodsforcalculatingaxialloadcapacityofhighstrengthsteelreinforcedconcretecompositecolumns AT xinranwang analysisandmodificationofmethodsforcalculatingaxialloadcapacityofhighstrengthsteelreinforcedconcretecompositecolumns AT qiliu analysisandmodificationofmethodsforcalculatingaxialloadcapacityofhighstrengthsteelreinforcedconcretecompositecolumns
_version_	1718411420193783808

Analysis and Modification of Methods for Calculating Axial Load Capacity of High-Strength Steel-Reinforced Concrete Composite Columns

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