Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns

Tao, Zhong; Han, Lin‐Hai; Zhao, Xiao‐Ling

doi:10.1016/j.jcsr.2003.11.008

Cited by 365 publications

(196 citation statements)

References 12 publications

(27 reference statements)

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“…In this line, the main contributions can be found in published works [1], [2], [3], [4] and [5]. Thus, Zhao and Grzebieta [1] and Elchalakani et al [4] carried out experimental campaigns on stub columns with SHS-SHS and CHS-SHS respectively.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

et al. 2017

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This paper presents the results of an experimental program where the load-bearing capacity at room temperature of 14 slender circular concrete-filled dual steel tubular (CFDST) columns under axial load was analysed. In this study, two specimens were prepared as ordinary concrete-filled steel tubular (CFST) columns to be used as references to evaluate the mechanical contribution of the inner steel tube and its infill in the CFDST columns. In addition, the effect of two types of concrete: normal strength concrete (NSC) and ultra-high strength concrete (UHSC) was assessed. Besides, in order to study the influence of the steel share between the inner and outer tube, different cross-sectional configurations were considered. Since the number of experimental results available in the literature on slender CFDST columns is scarce, this work provides novel results to this research field. The different influence of the steel distribution in the response of the specimens of each series was observed, with no influence in the case of columns with ultra-high strength concrete in the outer ring. Finally, the current provisions of Eurocode 4 for the design of composite columns were assessed by means of the results of these tests, being necessary more test data to extract solid conclusions about their accuracy and reliability.

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Section: Introductionmentioning

confidence: 99%

“…The first experimental program on double-skin CFDST with CHS-CHS section was developed by Tao et al [5]. The concrete compressive strength was 40 MPa and, for each specimen, the concentric steel tubes had the same thickness.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

et al. 2017

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“…The behavior of CFST columns and structural systems has been investigated. Tao et al experimentally investigated the behavior of CFST stub columns, and beam columns under various loading protocols have also been investigated [8][9][10][11][12][13][14][15]. They found that CFST demonstrated ductile behavior for the applications in seismic resistant structures.…”

Section: Simplified Fiber Element Modelsmentioning

confidence: 99%

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

et al. 2017

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This paper numerically studied the collapse capacity of high-rise steel moment-resisting frames (SMRFs) using various width-to-thickness members subjected to successive earthquakes. It was found that the long-period component of earthquakes obviously correlates with the first-mode period of high-rises controlled by the total number of stories. A higher building tends to produce more significant component deterioration to enlarge the maximum story drift angle at lower stories. The width-to-thickness ratio of beam and column components overtly affects the collapse capacity when the plastic deformation extensively develops. The ratio of residual to maximum story drift angle is significantly sensitive to the collapse capacity of various building models. A thin-walled concrete filled steel tubular (CFST) column is proposed as one efficient alternative to enhance the overall stiffness and deformation capacity of the high-rise SMRFs with fragile collapse performance. With the equivalent flexural stiffness, CFST-MRF buildings with thin-walled members demonstrate higher capacity to avoid collapse, and the greater collapse margin indicates that CFST-MRFs are a reasonable system for high-rises in seismic prone regions.

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“…Double-skinned CFST columns have some advantages over single-skinned CFST columns. From a structural point of view, double-skinned CFST columns have higher uni-axial strength (Han et al, 2011;Tao et al, 2004;Uenaka et al, 2010;Wright et al, 1991;Yang et al, 2008;, bending stiffness, moment capacity Lin and Tsai, 2001;Lu et al, 2009;Tao and Han, 2006), better ductility and excellent seismic performance (Zhao et al, 2010). The strength-to-weight ratio is largely improved owing to the cavity inside the inner steel tube.…”

Section: Introductionmentioning

confidence: 99%

Improving interface bonding of double-skinned CFST columns

Dong¹,

2013

Magazine of Concrete Research

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It has been demonstrated that high-strength concrete (HSC) is able to improve the strength-to-weight ratio of reinforced concrete columns and maximise the usable areas of tall buildings. However, closely spaced transverse reinforcement needs to be installed to provide stronger confinement for averting brittle failure of HSC. To resolve the problem, double-skinned concrete-filled-steel-tubular (CFST) columns have been advocated, which eliminates the steel congestion problem for better concrete placing and reduces the concrete arching action thus providing a more uniform confining pressure. Despite these advantages, a major shortcoming of double-skinned CFST columns is that imperfect interface bonding occurs in the elastic stage that reduces elastic strength and stiffness. Thus, the authors proposed to adopt external confinement to restrict the lateral dilation of the outer tube of double-skinned CFST columns. To verify the effectiveness of the proposed external rings, a total of 20 double-skinned normal-and high-strength CFST columns were tested. From the test results, it was observed that the stiffness, axial load-carrying capacity and ductility of ringconfined double-skinned CFST columns were significantly higher than the unconfined columns.

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Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns

Cited by 365 publications

References 12 publications

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

Influence of Ultra-high Strength Concrete on Circular Concrete-filled Dual Steel Columns

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

Improving interface bonding of double-skinned CFST columns

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