Effect of preload on the axial capacity of CFST reinforced concrete columns

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Abstract

The effect of the preload on the axial capacity of a CFST encased concrete column was modeled using a finite element model. The influence of the preload on the axial strength of the column was analyzed for various factors such as the section size, steel strength and concrete strength. The results show that the load versus deformation curve for the column with a preload move back with a slight increase in the axial strength. The preload ratio and the ratio of the outer concrete strength to the inner concrete strength significant affect the axial strength. Formulas are given to calculate the axial strength with a preload that considers the influence of these parameters as well as the confinement effect.

Keywords CFST concrete encased columns preload confinement factors axial compression bearing capacity

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Issue Date: 15 May 2014

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	Wu XU
	Qing YU
	Guohuang YAO

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Wu XU,Qing YU,Guohuang YAO. Effect of preload on the axial capacity of CFST reinforced concrete columns[J]. Journal of Tsinghua University(Science and Technology), 2014, 54(5): 556-562.

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http://jst.tsinghuajournals.com/EN/ OR http://jst.tsinghuajournals.com/EN/Y2014/V54/I5/556

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