Experimental investigation on square steel tubular columns with initial crack defects

Abstract: 7 square steel tubular columns were tested to discuss the ultimate axial bearing capacity, ductility performance and the steel consumption under stiffened by steel belts and binding bars of different cross-sections. Test results indicate that only by increasing fewer amounts of steel usage, stiffened square CFST columns with binding bars can not only improve the overall effects of restraint and alleviate regional local buckling between the binding bars, but also improve the bearing capacity of concrete filled square steel tubular columns. The utility benefits and the economical benefit is considerable, deserving extensive use.

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Experimental investigation on tubular columns infilled with ultra-high strength concrete

Tubular Structures XIII ◽

10.1201/b10564-88 ◽

2010 ◽

pp. 637-645 ◽

Cited By ~ 6

Author(s):

J Liew ◽

D Xiong

Keyword(s):

Experimental Investigation ◽

High Strength Concrete ◽

High Strength ◽

Strength Concrete ◽

Tubular Columns

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Experimental investigation on the fire behaviour of rectangular and elliptical slender concrete-filled tubular columns

Thin-Walled Structures ◽

10.1016/j.tws.2015.03.018 ◽

2015 ◽

Vol 93 ◽

pp. 137-148 ◽

Cited By ~ 25

Author(s):

A. Espinos ◽

M.L. Romero ◽

E. Serra ◽

A. Hospitaler

Keyword(s):

Experimental Investigation ◽

Fire Behaviour ◽

Tubular Columns

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Experimental Investigation on Behavior of Rectangular Concrete-Filled Tubular Columns Considering Diaphragms

Materials ◽

10.3390/ma13194412 ◽

2020 ◽

Vol 13 (19) ◽

pp. 4412

Author(s):

Sang-Lyul Cha ◽

Jung-Soo Lee ◽

Chan-Kyu Park ◽

Jin-Keun Kim ◽

Seung-Hee Kwon

Keyword(s):

Experimental Investigation ◽

High Strength ◽

Failure Behavior ◽

High Ductility ◽

Inelastic Behavior ◽

Structural Members ◽

Sectional Area ◽

Cross Sectional ◽

Tubular Columns ◽

Energy Dissipation Capacity

Concrete-filled tubular (CFT) columns have been widely used as structural members because CFT columns synergize the advantages of steel and concrete resulting in high strength, high ductility, and large energy dissipation capacity. Numerous studies have been performed to understand the behavior of CFT columns. However, the behavior of CFT columns remains uncertain due to their inelastic behavior and uncertain confinement effects, especially when failure occurs. In addition, diaphragms, which are generally installed, make it more complicated to understand the behavior of CFT columns. The purpose of this study is to investigate the effects of the diaphragms on the failure behavior of the CFT columns. To this end, eighteen rectangular CFT columns were tested with five different loading cases. The experimental results suggest that the size of the diaphragm has significant effects on the compressive strength and toughness of the CFT columns. In order to facilitate the proper composite actions of steel and concrete, the size of a diaphragm has to be at least three-quarters of the cross-sectional area.

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Axial Strength of Concrete-Filled Square Steel Tubular Columns Reinforced by Inner Circular Steel Tube

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.4542 ◽

2010 ◽

Vol 163-167 ◽

pp. 4542-4545 ◽

Cited By ~ 2

Author(s):

Xin Zhong Li ◽

Xue Ying Wei ◽

Jun Hai Zhao

Keyword(s):

Experimental Investigation ◽

Steel Tube ◽

Experimental Results ◽

Test Results ◽

Strength Theory ◽

Unified Strength Theory ◽

Axial Strength ◽

Tubular Columns ◽

Circular Steel Tube ◽

Good Agreement

This paper presents the theoretical and experimental results of concrete-filled steel tube columns subjected to axially compression. A total of 6 specimens with outer square sections reinforced by inner cicular steel tube were constructed for experimental investigation. The ultimate strengths of the columns from tests were obtained. The theoretical strengths of the columns were also investigated based on unified strength theory, and compared with the test results. Good agreement can be observed from the comparison.

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