Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Yu, Tao; Hu, Y. M.; Teng, Jinguang

doi:10.1016/j.jcsr.2016.05.006

Cited by 63 publications

(22 citation statements)

References 20 publications

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“…To improve the durability of the outer steel tube of CFT and STCC elements under aggressive environments, and to avoid or delay the early age local buckling of steel tube of CFT elements, several researchers proposed using FRP wrap to confine CFT (FRP-CFT, Fig. 1d) [20][21][22][23][24][25][26][27][28] or STCC (FRP-STCC, Fig. 1e) [29] elements.…”

Section: Monotonic Axial Compressive Behaviour and Confinementmentioning

confidence: 99%

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Wang

Cai

Larbi

et al. 2020

Engineering Structures

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Steel tube confined concrete (STCC) is widely used in the vertical members of high-rise buildings such as columns. The axial load is not directly resisted by the steel tube in STCC, but is resisted via the interfacial frictional stress between steel tube and concrete core, which is different with that of concrete filled steel tube (CFT) members and would effectively suppress the outward local buckling of steel tube at early stage. Recently, fibre-reinforced polymer (FRP) confined STCC presents a potential to enhance the ductility and durability of such vertical elements. This paper presents an experimental study on monotonic axial compressive behaviour of carbon FRP (CFRP) confined STCC (CFRP-STCC) stub column and an analytical study on the confinement mechanism of and the ultimate axial bearing capacity of the elements. A three-stage confinement mechanism involving the different contributions of the steel tube and the CFRP wrap in CFRP-STCC elements was proposed based on the test results. A prediction model of the ultimate axial bearing capacity of CFRP-STCC stub columns was developed subsequently. Results show that the presence of CFRP wrap enhances effectively the load-bearing capacity and the ductility of steel tube confined plain concrete and reinforced concrete elements, and significantly prevents the local buckling of the steel tubes in the elements. The proposed prediction model of ultimate axial bearing capacity assesses test results with a great agreement.

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Section: Monotonic Axial Compressive Behaviour and Confinementmentioning

confidence: 99%

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Wang

Cai

Larbi

et al. 2020

Engineering Structures

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“…In 2005, Xiao et al (2005 performed a study to introduce and experimentally validate FRP-confined CFST columns under axial and seismic loads and confirmed the excellent seismic performance of these columns. Recently, several studies were reported to examine the constitutive behaviour of FRP-confined CFST columns (Xiao et al 2005, Liu and Lu 2010, Park et al 2010, Tao et al 2011, Lin 2012, Teng et al 2013, Park and Choi 2013, Hu and Seracino 2013, Wang et al 2015,Yu et al 2016, but more studies are underway to examine details of the elements.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Circular Fiber-Reinforced Polymer–Steel-Confined Concrete Columns Subjected to Reversed Cyclic Loads: Experimental Studies and Finite-Element Analysis

et al. 2019

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This paper studies experimentally the behaviour of circular FRP-steel confined concrete columns subjected to reversed cyclic loads. The influence of main structural factors on the cyclic behaviour of the columns is discussed. Test results show the outstanding seismic performance of FRP-steel confined reinforced concrete (RC) and steel-reinforced concrete (SRC) columns. The lateral confinement effectiveness of GFRP tube and GFRP-steel tube was verified and a simplified OpenSees-based finite element method (FEM) model was developed to simulate the experimental results of the test columns. Based on the proposed FEM model, a parametric analysis was conducted for investigating the effects of main factors on the reversed cyclic behaviour of GFRP-steel confined RC columns. Based on the test and numerical analyses, the study discussed the influence of variables such as the lateral confinement on the plastic hinge region (PHR) height and peak drift ratio of the columns under reversed cyclic loads. Results indicate that the lateral confinement significantly affects the PHR height of the circular confined RC columns. Based on the analyses of the data from this study and literature, a simple model was suggested to predict the peak drift ratio of the confined RC columns.

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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%

“…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. Nevertheless, for circular HCFTST columns, an uncertainty in the composite action still exists due to out‐of‐code D / t ratios; very few experimental studies within the aforementioned literature considered the seismic behavior of circular HCFTST columns with out‐of‐code D / t ratios.…”

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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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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Cyclic lateral response of FRP-confined circular concrete-filled steel tubular columns

Cited by 63 publications

References 20 publications

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Behavior of Circular Fiber-Reinforced Polymer–Steel-Confined Concrete Columns Subjected to Reversed Cyclic Loads: Experimental Studies and Finite-Element Analysis

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

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