Experimental Behavior of Concrete-Filled Steel Tube Columns Using Ultrahigh-Strength Steel

Skalomenos, Konstantinos A.; Hayashi, Kazuhiro; Nishi, Ryoichi; Inamasu, Hiroyuki; Nakashima, Masayoshi

doi:10.1061/(asce)st.1943-541x.0001513

Cited by 71 publications

(25 citation statements)

References 17 publications

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“…Many quasi‐static cyclic loading tests have been conducted to investigate the seismic behavior of conventional circular CFST columns, but they concentrated mainly on NS concrete and NS steel . Meanwhile, Elremaily and Azizinamini studied the seismic behavior of six circular CFST columns with a concrete cylinder compressive strength varying from 40 to 104 MPa and NS steel ( f y = 372 MPa) with D / t ratios of 51 and 34.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, Elremaily and Azizinamini studied the seismic behavior of six circular CFST columns with a concrete cylinder compressive strength varying from 40 to 104 MPa and NS steel ( f y = 372 MPa) with D / t ratios of 51 and 34. Skalomenos et al investigated the hysteretic behavior of three circular CFST columns ( D / t = 25) with f c values between 42.4 and 82.3 MPa and f y values varying from 387 to 788 MPa. Their studies revealed that the use of HS steel tubes could provide a larger elastic deformation capacity and a better confining effect than NS steel tubes under small‐ D / t ratios and that HS core concrete could delay local buckling until the occurrence of a large rotation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and analytical investigation on seismic behavior of Q690 circular high‐strength concrete‐filled thin‐walled steel tubular columns

Wang

Sun

et al. 2019

Structural Design Tall Build

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This paper proposed a new Q690 circular high-strength concrete-filled thin-walled steel tubular (HCFTST) column comprising an ultrahigh-strength steel tube (yield strength f y ≥ 690 MPa). A quasi-static cyclic loading test was conducted to examine the seismic behavior, and the obtained lateral load-displacement hysteresis curves, skeleton curves, and ductility were analyzed in detail. Then, a numerical model based on a nonlinear fiber beam-column element incorporating the modified uniaxial cyclic constitutive laws for concrete and steel was developed mainly to predict the seismic behavior of the tested Q690 circular HCFTST columns. The effects of the concrete cylinder compressive strength ( f c ), steel yield strength ( f y ), axial compression ratio (n), and diameter-to-thickness (D/t) ratio on the seismic behavior were investigated through a parametric study. Finally, a simplified hysteretic model incorporating the moment-resisting capacity and deterioration of the unloading stiffness in addition to a normalized skeleton curve and hysteretic criterion was established. The results indicate the following: the proposed Q690 circular HCFTST columns can display reasonable hysteretic behaviors to some extent; the use of high-strength steel can lead to a significantly larger elasto-plastic deformation capacity and delay the appearance of post-peak behavior, even if a lower ductility capacity is provided; moderately loosening the limitations on the D/t ratio can also result in ideal hysteretic behaviors; and the established numerical model and simplified hysteretic model can satisfactorily predict the experimentally observed load-displacement hysteretic curves, including the deterioration of the strength and stiffness and can, thus, offer design references for the elasto-plastic analysis of circular HCFTST columns. KEYWORDS deteriorating behavior, modified uniaxial cyclic constitutive model, nonlinear fiber element method, Q690 circular high-strength concrete-filled thin-walled steel tubular (HCFTST) columns, seismic behavior, simplified hysteretic model

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and analytical investigation on seismic behavior of Q690 circular high‐strength concrete‐filled thin‐walled steel tubular columns

Wang

Sun

et al. 2019

Structural Design Tall Build

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“…However, it is noteworthy that no HS materials were adopted in their tests [20][21][22]. On the other hand, the aforementioned researches [15][16][17][18] mainly aim at hysteretic behavior of the traditional concrete-filled thickwalled steel tubular columns using HS materials. Therefore, more experimental studies are needed to examine the hysteretic performance of CFTST columns using HS materials, namely the HCFTST columns.…”

Section: Introductionmentioning

confidence: 99%

“…Varma et al [16,17] examined the seismic behavior of HS square CFST columns filled with HS concrete (fc =110 MPa) and steel yield strength (fy) ranging from 269 to 660 MPa. Skalomenos et al [18] investigated the hysteretic behavior of circular and square CFST columns with fc varying from 42.4 to 82.3 MPa and fy varying from 387 to 788 MPa. For the CFST columns, the HS steel tube can provide a larger elastic deformation capacity and better confined effect, while the application of HS core concrete can delay local buckling of steel tube.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier significant experimental researches conducted by many scholars [4][5][6][7][8][9][10][11][12][13][14] do have great importance on the understanding of hysteretic performance of CFST columns. Recently, using the high strength (HS) materials in concretefilled steel tubular (CFST) columns is the effective way and popular tendency to promote the seismic behavior in anti-seismic design [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Hysteretic performance research on high strength circular concrete-filled thin-walled steel tubular columns

Wang

Sun

2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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Under violent earthquake motions, the severe damage in critical regions of structures could be ascribed to cumulative damage caused by cyclic loading. Using the high strength (HS) materials in concrete-filled steel tubular (CFST) columns is the effective way and popular tendency to promote the seismic behavior in anti-seismic design. In this paper, an experimental study on the hysteretic performance of high strength circular concrete-filled thin-walled steel tubular columns (HCFTST) columns was carried out. A total of six specimens were tested under constant axial compression combining cyclic lateral loading. The tested parameters were the different combinations of diameter-to-thickness (D/t) ratio, axial compression ratio (n) and concrete cylinder compressive strength (fc).The failure modes, load-displacement hysteretic curves, skeleton curves, dissipated energy and stiffness degradation were examined in detail. Through the experiment analysis result, it indicates that the ultimate limit state is reached as the severe local buckling and rupture of the steel tubes accompanying the core concrete crushing occur. Using high strength materials could have a larger elastic deformation capacity and the higher axial compression ratio within test scopes could motivate the potential of HS materials. In brief, the HCFTST columns with ultra-large D/t ratios under reasonable design could perform excellent hysteretic performance, which can be applied in earthquake-prone regions widely.

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Cyclic Behavior of Tubular Steel Columns with High Yield‐to‐Tensile Strength Ratio under Asymmetric Loading Protocols

Hamauzu

Skalomenos²

2021

ce papers

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This paper investigates the cyclic behavior of steel columns subjected to single‐sided cyclic loading protocols driven by residual deformations. First, nonlinear time‐history analyses are performed to steel framed structures using a set of repeated earthquakes. Then, based on the dynamic analysis results, a set of single‐sided loading protocols is developed to envelop the asymmetric seismic behavior of the examined frames. The developed protocols are used to identify the new single‐sided capacity margins of steel columns in terms of strength and ductility as well as evaluate the potential of using novel high‐strength materials. In this paper: (a) the new asymmetric loading protocols are proposed based on the seismic behavior of three medium‐rise frame buildings with different beam‐to‐column strength ratios (i.e. Mpc/Mpb) which are analyzed with the aid of the finite element analysis (FEA) software ABAQUS; (b) a computational databank of the inelastic responses of square tubular steel columns with high yield‐to‐tensile (YT) strength ratio is developed by subjecting column FEA models with various width‐to‐thickness ratio and axial loads to both conventional and asymmetric cyclic loading protocols. Due to the asymmetrical nature of the cyclic protocols, a lower post‐peak strength deterioration was observed in columns that enables the definition of new, extended, ductility capacity margins. The ductility capacity ratios under the asymmetric loading protocols were found to be 1.15 to 1.71 higher than those obtained under the conventional protocols enabling the use of high‐strength steels in steel columns of smaller width‐to‐thickness ratio.

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Experimental Behavior of Concrete-Filled Steel Tube Columns Using Ultrahigh-Strength Steel

Cited by 71 publications

References 17 publications

Experimental and analytical investigation on seismic behavior of Q690 circular high‐strength concrete‐filled thin‐walled steel tubular columns

Experimental and analytical investigation on seismic behavior of Q690 circular high‐strength concrete‐filled thin‐walled steel tubular columns

Hysteretic performance research on high strength circular concrete-filled thin-walled steel tubular columns

Cyclic Behavior of Tubular Steel Columns with High Yield‐to‐Tensile Strength Ratio under Asymmetric Loading Protocols

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