Axial Compression Behavior of Concrete Filled Steel Tubular Stub Columns Using High Strength Materials

Fujimoto, Toshiaki; Mukai, Atsushi; Nishiyama, Isao; Inai, Eiichi; Kai, Makoto; Tanaka, Yoshinari; Tokinoya, Hiroyoshi; Noguchi, Takashi; Baba, Toshihide; Fukumoto, Noboru; Murata, Yoshiyuki; Sakino, Kenji; Morino, Syosuke

doi:10.3130/aijs.62.161

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…(2) The confined effect: When concrete is subjected to laterally confining pressure, the uniaxial compressive strength and the corresponding strain are much higher than those of According to Ref. [1,2,3,4,5,6,7,8], in case of CFT structures, steel tube and concrete is completely bonded, meanwhile the effect of shrinkageandcreep of concrete and local buckling of steel tube to the CFT structure can be neglected. If the same assumptionsare applied to the steel tube and reinforcement of RCFT structures, the ultimate bearing capacity of RCFT columns under axial compressionsimply may be assumed as follows:…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, concrete filled tubular steel (CFT)structures are widely used as a kind of composite structures in the field of engineering works and construction. A lot of these on CFT have been presented up to now [1,2,3,4,5,6,7,8] . According to those results CFT has better structural performance than that of bare steel tube or bare concrete: filled concrete controls the local buckling of steel tube, and steel tube can give play to own high mechanical performances; concrete strength, ductility and rigidity are improved greatly because filled concrete is confined by steel tube and it becomes tri-axial stress condition.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Reinforcement Ratio of RCFT Columns under Axial Compression

Xiamuxi

Hasegawa

2011

AMR

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It is clear from the former researches on reinforced concrete filled tubular steel (RCFT) structures that RCFT structures have better performance than concrete filled tubular steel (CFT) structures, in other words, because of the existence of reinforcement, the performance of RCFT differed from that of CFT. Therefore, to clarify the effect of axial reinforcement on mechanical properties of RCFT, compression tests of RCFT columns with different ratio of axial reinforcement were carried out, meanwhile, corresponding tests of CFT, reinforced concrete (RC), pure concrete, and steel tube columns were done to compare with RCFT. By a series of comparison and analysis, effect of axial reinforcement on RCFT columns were discussed, and following conclusions were drawn: reinforcement ratio has direct effect on performance of RCFT. Over arranged reinforcement will cause pre-failure of concrete without exerting strength of reinforcement, and not only may cause brittle-failure or lower performance of the structure, but also cause the increase of construction cost. On the contrary, proper ratio of reinforcement can make the RCFT possess better confined effect, improve overall performance of the RCFT structure; furthermore, whatever the ratio of reinforcement, RCFT has better performance than both CFT and RC, especially possesses more brittle-failure resistance than CFT.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Reinforcement Ratio of RCFT Columns under Axial Compression

Xiamuxi

Hasegawa

2011

AMR

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“…Brittle-ductile transition behaviour of the concrete core in CFSTs depends on both the D/t ratio of steel tube and fcp. In general, the CFSTs have two typical failure modes [22], as shown in Figure 10.…”

Section: Analytical Investigation Of Concretementioning

confidence: 99%

Axial Residual Capacity of Circular Concrete-Filled Steel Tube Stub Columns Considering Local Buckling

2018

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This paper proposes a superposition method considering local buckling to estimate the residual capacity of circular concrete-filled steel tube stub columns (CFSTs) under axial compression based on substantial experimental data, consisting of 3 recently conducted tests as well as 150 test results from available literature. The proposed approach accounts for the influence of local buckling of the steel tube on confining effect, by introducing a coefficient to reduce the compressive strength of concrete in the post-buckling stage. Three specimens, including a bare steel stub column with circular hollow section (CHS), a CHS with concrete restraint and a CFSTs, were tested to investigate the contribution of concrete on the local buckling. Further, the mechanical model of steel tube was established and the design equations for residual bearing capacity of the tube were derived. The nominal load-shortening curves of the concrete core are extracted from 150 collected experimental curves of the CFSTs, with different parameters such as diameter-to-thickness (D/t) ratio, yield strength fsy and concrete strength fcp. The variation of the stiffness degradation in the curves indicates that the effect of local buckling on both ductility and residual compressive strength of the concrete core are correlated with the section type of the steel tube. The residual compressive strength decreases exponentially with the increase of the generalized outer diameter-to-thickness ratio.

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Comprehensive stress-strain model of square steel tube stub columns under compression

Hua

Sun

Takeuchi

et al. 2017

Engineering Structures

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Axial Compression Behavior of Concrete Filled Steel Tubular Stub Columns Using High Strength Materials

Cited by 12 publications

References 2 publications

Experimental Study on Reinforcement Ratio of RCFT Columns under Axial Compression

Experimental Study on Reinforcement Ratio of RCFT Columns under Axial Compression

Axial Residual Capacity of Circular Concrete-Filled Steel Tube Stub Columns Considering Local Buckling

Comprehensive stress-strain model of square steel tube stub columns under compression

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