Axial load behaviour of high-strength rectangular concrete-filled steel tubular stub columns

Liu, Dalin; Gho, Wie Min

doi:10.1016/j.tws.2005.03.007

Cited by 178 publications

(56 citation statements)

References 8 publications

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“…The tests by Tan and Pu [9] show that compared with the ordinary CFST, the strength and plastic deformation of UHSC will be significantly improved due to the confinement effect of steel tube, the same as the bearing capacity of UHSCFST. The authors [10][11][12][13] also reached similar conclusions. However, Liew and Xiong [14,15] described that the UHSCFST has strong bearing capacity, but the load versus axial displacement curves tended to drop quickly after peak loads.…”

Section: Introductionsupporting

confidence: 59%

Experimental Study on Ultrahigh Strength Concrete Filled Steel Tube Short Columns under Axial Load

Zhou

Mou

Tang

et al. 2017

Advances in Materials Science and Engineering

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Based on the project of Modaoxi Bridge, an experimental study on the compressive behavior of ultrahigh strength concrete filled steel tube (UHSCFST) short column was conducted. A total of 9 UHSCFST specimens were tested, and the cube strength ( cu ) of the core concrete reached 115.4 MPa. Main parameters were the confining factor ( = 0.608, 0.919, and 1.015), steel ratio ( = 14.67%, 20.02%, and 21.98%), and steel strength ( = 349 MPa, 352 MPa, and 427 MPa). The axially loading test results showed that the visible damage of steel tube occurred under the ultimate load. The higher the confining effect, the less the damage features. And all specimens basically presented a drum-type failure mode. The confining effect of steel tube effectively changed the brittle failure mode of ultrahigh strength concrete (UHSC) and tremendously improved the load bearing capacity and ductility of specimens. Moreover, the higher the steel ratio and steel strength of the specimens, the stronger the confining effect. Meanwhile the excellent mechanical properties will be obtained. Also it is recommended that the UHSCFST prefers Q345 or above strength steel tube to ensure sufficient ductility, and the steel ratio should be more than 20%. Furthermore, the confining effect of steel tubes can improve the ultimate bearing capacity of the ultrahigh strength CFST short columns.

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Section: Introductionsupporting

confidence: 59%

Experimental Study on Ultrahigh Strength Concrete Filled Steel Tube Short Columns under Axial Load

Zhou

Mou

Tang

et al. 2017

Advances in Materials Science and Engineering

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“…본 장에서는 기존의 연구(Liu [11] , Liu 등 [12] , Liu와 Gho [13] , Varma 등 [14] )에 보고 된 실험 데이타베이스를 분석하여 각형강관이 제공하는 구 속효과를 평가 하였다. 이 분석에 사용된 실험 데이타베이스 는 아래와 같이 100MPa급 고강도콘크리트 및 834MPa급 고강도강재를 까지 넓은 범위를 포괄하고 있다:…”

Section: 기존 실험연구의 분석unclassified

“…RCFT기둥의 단주압축강도에 대한 Liu [11] , Liu 등 [12] 과 Liu와 Gho [13] 의 결과와 합치한다(Furlong [8] , Gourley 등 [9] , Schneider [16] ).…”

Section: 단주 압축강도unclassified

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Constitutive Relation of Concrete to Predict P-M Interaction Strength of Rectangular CFT Short Columns

Lee

Kang²,

Kim³

2015

Journal of Korean Society of Steel Construction

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-The plastic stress distribution method and the strain compatibility method are the two representative methods to calculate the P-M interaction strength of RCFT (rectangular concrete filled tube) columns. The plastic stress distribution method is approximate while the stress compatibility method should approach the exact solution if accurate constitutive relations of the materials involved are used. Recent study by the authors pointed out that, because of lack of accurate constitutive model for the concrete confined by the rectangular steel tube, no strain compatibility method according to the current structural provisions provides a satisfactory prediction of the P-M interaction strength of RCFT columns under various material combinations. An empirical constitutive model which can capture the stress-strain characteristics of the confined concrete of RCFT columns is proposed based on analyzing extensive exisitng test database. The key idea was to define the concrete crushing strain as a function of steel-to-concrete strength ratio and width-to-thickness ratio of steel tube. It was shown that the proposed model leads to more accurate and more consistent prediction of the P-M interaction strength of RCFT columns under general design conditions.

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“…Test results also indicated that the provisions in EC4, ACI and AISC conservatively predicted the failure loads by 1%, 9% and 11%, respectively. Based on the test data of 26 stub columns with f y = 300-495 MPa and f c = 55-106 MPa, Liu and Gho [10] proposed a numerical model to estimate the axial load-shortening response of high-strength rectangular CFT columns. Furthermore, Liu [11] presented results of eccentric loading tests on 12 CFT slender columns.…”

Section: Previous Researchmentioning

confidence: 99%

Axial load behaviour of high-strength rectangular concrete-filled steel tubular stub columns

Cited by 178 publications

References 8 publications

Experimental Study on Ultrahigh Strength Concrete Filled Steel Tube Short Columns under Axial Load

Experimental Study on Ultrahigh Strength Concrete Filled Steel Tube Short Columns under Axial Load

Constitutive Relation of Concrete to Predict P-M Interaction Strength of Rectangular CFT Short Columns

Behaviour of eccentrically loaded high-strength rectangular concrete-filled steel tubular columns

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