Experimental study of concrete-filled CHS stub columns with inner FRP tubes

Long, Yue; Li, Wen Tao; Dai, Jian‐Guo; Gardner, Leroy

doi:10.1016/j.tws.2017.10.046

Cited by 41 publications

(3 citation statements)

References 48 publications

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“…A relevant part of previous studies was focused on stainless steel composite columns [16][17][18][19][20][21][22][23][24][25][26][27][28]. Hassanein et al [29][30][31][32][33][34][35][36][37][38] Reduction factor for the distortional buckling resistance 𝛽 Reliability index short and slender concrete-filled stainless steel tubular columns using experimental tests and the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Buckling resistance of concrete-filled cold-formed steel (CF-CFS) built-up short columns under compression

Rahnavard

Craveiro

Simões

et al. 2022

Thin-Walled Structures

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Section: Introductionmentioning

confidence: 99%

Buckling resistance of concrete-filled cold-formed steel (CF-CFS) built-up short columns under compression

Rahnavard

Craveiro

Simões

et al. 2022

Thin-Walled Structures

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“…Past research has shown that concrete subjected to the demands of both FRP tubes and steel tubes (STT) has a remarkable ductile functioning that is vital and eye-catching in seismic locations [ 34 , 35 , 36 , 37 ]. FRP-concrete-steel double-skin tube confined columns evaluate all of the components of such composite sections, which comprise two tubes and inner concrete [ 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Recycled Aggregate Geopolymer Concrete-Filled Double Skin Tubular Columns with Internal Steel and External FRP Tube

Alashker

Raza

2022

Polymers

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The large production of cement is resulting in a high-carbon footprint, which is essential to minimize for sustainable concrete construction. Moreover, the large quantity of recycled coarse aggregate (RCA) from the demolition of old concrete structures is creating problems for landfill and disposal. The primary goal of this study is to investigate the seismic efficiency of innovative fiber-reinforced polymer (FRP)-recycled aggregate geopolymer concrete (RAGC) steel-tubed columns (FGSTCs) with an internal steel tube (STT), an external glass-FRP tube (GLT), and RAGC located between the two-tubed components to develop a serviceable structural element. To study their seismic functioning under axial load and lateral repeated load, five FGSTC specimens were manufactured and analyzed under quasi-static loads. The influence of three variables on the performance of FGSTC specimens, consisting of STT reinforcing ratio, compression ratio, and recycled coarse aggregate (RCA) replacement ratio, was investigated in this investigation. The produced specimens’ ductility, hysteretic loops, strain distribution, skeleton curves, stiffness functioning, energy capacity dissipation, damaging functioning, and strength loss were all assessed and discussed. The results of this investigation revealed that percentage substitution of RCA had a minor impact on the seismic functioning of FGSTCs; however, the compression-load ratio depicted a substantial impact. The energy loss of the FGSTCs was 24.5% higher than that of their natural aggregate equivalents. FGSTCs may have a 16.9% lower cumulative failure rate than their natural aggregate counterparts.

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“…In recent years, composite structures encased with GFRP tubes have also been widely used in civil engineering. An experimental study on axial compressive behavior of concretefilled circular hollow section stub columns with inner FRP was carried out by Long et al [32], and the ultimate load-bearing capacity of the composite columns was slightly overpredicted by a simple superposition theory; finally, by introducing a reduction coefficient, a reasonable formula for calculating the ultimate axial compression-bearing capacity was proposed. In 2019, experimental research and numerical analysis of FRP-confined concrete coreencased rebar for RC columns under seismic load were conducted by Wang et al [33], and by considering the compressive behavior enhancement effect, the minimum FRP tube diameter required for the composite columns was calculated.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Special-Shaped Reinforced Concrete Composite Columns Encased with GFRP Core Columns

Jiang

et al. 2022

Buildings

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In order to investigate the mechanical behavior of special-shaped reinforced concrete composite columns encased with GFRP core columns (EGCSSCs) subjected to axial load, twenty-seven full-scale EGCSSCs were designed with varying parameters: axial compressive strength of core concrete (fcc), axial compressive strength of peripheral concrete (fco), thickness of GFRP tube (tgfrp), ratio of longitudinal reinforcement (ρv), stirrup ratio (ρs) and GFRP ratio in the cross-section (α). The three-dimensional finite element refined models of EGCSSCs were established by ABAQUS finite element software, and the response of EGCSSCs under axial load was studied based on the verification of finite element modeling. The influence of different parameters on the ultimate axial compressive strength (Nus), initial stiffness (K), and ductility index (µ) of EGCSSCs was obtained, and the typical failure mode of EGCSSCs was clearly described. The results showed that the main failure mode of the EGCSSCs subjected to axial load was bulging outward at the middle of the EGCSSCs, showed yielding of the longitudinal steel bars, and was crushing both ends of the peripheral concrete. When the column was damaged, the peripheral concrete reached peak stress earlier than the core concrete. All specimens exhibited excellent load-carrying capacity and good ductility. Moreover, with the existence of GFRP core columns, the Nus and µ of the columns were increased by 11.61% and 140.86%. In addition, K increased with the increase in fcc, fco, tgfrp and α, and the largest increments were 23.99%, 50.54%, 21.77%, and 34.19%, respectively. µ decreased with the increase in fcc and fco, which decreased by 14.05% and 40.28%, respectively. By using statistical regression and introducing the constraint effect coefficients and the reduction coefficient, the calculation formula for the axial compression-bearing capacity of EGCSSCs was derived, which could lay a foundation for the popularization and application of this kind of composite column in practical engineering.

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Experimental study of concrete-filled CHS stub columns with inner FRP tubes

Cited by 41 publications

References 48 publications

Buckling resistance of concrete-filled cold-formed steel (CF-CFS) built-up short columns under compression

Buckling resistance of concrete-filled cold-formed steel (CF-CFS) built-up short columns under compression

Seismic Performance of Recycled Aggregate Geopolymer Concrete-Filled Double Skin Tubular Columns with Internal Steel and External FRP Tube

Mechanical Behavior of Special-Shaped Reinforced Concrete Composite Columns Encased with GFRP Core Columns

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