Theoretical and numerical analysis on the ultimate bearing capacity of CFRP-confined CFSST stub columns

Tang, Hongyuan; Chen, Junlong; Yue, Zhaoyang; Jia, Yigang; Yuan, Zhao

doi:10.1007/s43452-021-00346-9

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…When modeling the CFRP wrap, it is considered as linear elastic composite plate “LAMINA”, and the strength and damage characteristics of CFRP sheets were modeled using Hashin damage model in ABAQUS software. In this study, the CFRP parameters were determined according to Tang et al (2021). Parameters required for modeling CFRP are shown in Table 5.…”

Section: Finite Element Modelingmentioning

confidence: 99%

“…According to Section Design of inner tube, the minimum thickness to prevent local buckling of the inner steel tube before the outer steel tube (ti,min=0.86mm) is much smaller than the thickness of the inner steel tube (4 mm) used in this study. To make the calculated results of the formula safer, the strength of the inner steel tube is partially multiplied by a reduction factor of 0.85 (AIJ, 2008; Tang et al, 2021) to obtain Equation (22):…”

Section: Prediction Of Ultimate Bearing Capacitymentioning

confidence: 99%

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Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Tang

Qin

Hong

et al. 2023

Advances in Structural Engineering

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Concrete-filled double-skin steel tubes (CFDSTs) are widely used in civil engineering. During the service life of CFDSTs, their bearing capacity can be easily weakened by the corrosion of outer steel tubes. This study investigated the interaction mechanism and reinforcement effects of carbon fiber-reinforced plastic (CFRP)-confined CFDSTs under axial compression. Typical failure modes, axial load-shortening curves, and axial load-strain behaviors of CFDST and CFRP-confined CFDST (CFRP-CFDST) specimens were obtained. The test results showed that the ultimate bearing capacity of stub columns with concrete strength of C40 and C60 increased by 19.78% and 15.12%, respectively, when wrapped with two layers of CFRP sheets, and by 41.60% and 37.99%, respectively, when wrapped with four layers of CFRP sheets. In addition, the FE modeling of CFRP-CFDSTs was established and validated by experimental results. On this basis, the parametric analysis was conducted. To avoid local buckling and yield failure of the inner steel tubes before the outer steel tubes, a calculation formula was proposed for predicting the minimum wall thickness of the inner tube. Furthermore, the prediction formulas for the bearing capacity of CFDSTs and CFRP-CFDSTs were proposed.

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Section: Finite Element Modelingmentioning

confidence: 99%

Section: Prediction Of Ultimate Bearing Capacitymentioning

confidence: 99%

Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Tang

Qin

Hong

et al. 2023

Advances in Structural Engineering

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“…The repair and strengthening of seismically damaged columns needs to be thoroughly studied if the columns are made of recycled concrete. At present, external clad steel strengthening, increased section method strengthening, and carbon fiber composite materials (CFRP) strengthening are the main methods of strengthening seismically damaged members [5][6][7][8]. Among them, CFRP strengthening has been widely used because of its high strength, light weight, good durability, and easy construction [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage

Song,

Tian,

Zhao

et al. 2023

Buildings

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To study the strengthening effect of carbon fiber composite materials (CFRP) on recycled concrete columns subjected to different levels of seismic damage, four column specimens were designed for pseudo-static tests. The four specimens were categorized as non-destructive without strengthening (prototype), non-destructive strengthening, medium seismic damage strengthening, and severe seismic damage strengthening based on the replacement rate of recycled aggregates and the level of seismic damage. The characteristics of the deformation damage and seismic performance indicators of each specimen were compared and analyzed. The results were verified on the OpenSees platform. A decrease was observed in the initial stiffness of the seismically damaged recycled concrete column specimens strengthened with CFRP, while the ductility, peak bearing capacity, and energy dissipation capacity of the specimens were improved. In addition, with the reduction in seismic damage, the ductility and energy dissipation capacity of the strengthened seismically damaged recycled concrete column specimens were enhanced to different degrees. In particular, the cumulative energy dissipation of the strengthened specimens exposed to medium seismic damage increased most significantly, by 32.5%. In general, the hysteretic curves of the strengthened specimens were full, and the average ductility coefficients were 4.1–6.8. CFRP strengthening was more effective for restoring and enhancing the performance of the recycled concrete column specimens with medium and lower seismic damage levels (displacement ratio ≤ 3%).

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Analysis on axial compressive capacity of hybrid fiber cement-based composites encased CFST columns

Sun

2022

Archiv.Civ.Mech.Eng

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Theoretical and numerical analysis on the ultimate bearing capacity of CFRP-confined CFSST stub columns

Cited by 5 publications

References 36 publications

Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Experimental Study on Seismic Performance of CFRP-Strengthened Recycled Concrete Columns with Different Levels of Seismic Damage

Analysis on axial compressive capacity of hybrid fiber cement-based composites encased CFST columns

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