Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Wu, Yu-Fei; Wei, Youyi

doi:10.1016/j.engstruct.2009.08.012

Cited by 299 publications

(99 citation statements)

References 21 publications

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“…Wu and Wei [33] presented the results of an experimental study on the behavior of axially loaded short rectangular columns that have been strengthened with CFRP wrap. The parameters considered were the aspect ratio, defined as the depth (longer side)/width (shorter side) of the cross-section, and the number of CFRP layers.…”

Section: Wu and Wei [33]mentioning

confidence: 99%

“…The reliability of such models is linked to a correct definition of the effective confining pressure on the concrete member. In fact, results of several uniaxial compression tests performed on FRP and FRCM wrapped specimens have shown that the ultimate hoop strain reached in the jacket, which the maximum confining pressure depends of, is generally smaller than the ultimate strain found for flat coupon tensile tests [27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Simplified analytical models for compressed concrete columns confined by FRP and FRCM system

et al. 2017

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In order to consider the response of concrete columns confined by FRP and FRCM system, proper models have to be formulated. In this context the present paper shows a generalized criterion for the determination of the increase in strength, in ductility and in dissipated energy for varying corner radius ratio of the cross section and fiber volumetric ratio. The procedure is based on the best fitting of several experimental data and unlike the usual empirical approaches available in the literature, the proposed technique relates the confinement effectiveness to a single parameter representative of the relative stiffness between the original concrete core and the reinforcement system. Furthermore, the proposed analytical models overcomes the limit of many empirical or semi-empirical models given in the literature that are applicable only to specific cases. A comparison with same available models confirm the reliability of the proposed procedure.

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Section: Wu and Wei [33]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simplified analytical models for compressed concrete columns confined by FRP and FRCM system

et al. 2017

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“…Xiang, Deng [3] studied durability of CFRP-concrete joints under freeze-thaw cycling. Bond-slip behaviors of joints were also intensively investigated [4][5][6][7][8][9][10]. Xu, Chen [11] presented a study on seismic-induced damage assessment of three-dimensional joints connected with T-shaped steel SRC column-steel beams.…”

Section: Introductionmentioning

confidence: 99%

Structural Performances of Steel Reinforced Concrete Special Shaped Column-Beam Joints Under Bidirectional Low-Cyclic Reversed Loading

Xiang¹

2017

AJCE

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Steel reinforced concrete special-shaped column is a new structural form. It has all priorities of steel reinforced structure and special-shaped column structure. Bearing capacity and ductility of this new structure are very good. It also has very excellent applicable quality and pleasing to the eye. But there are still few experimental and research results relevant to this new structure. The design of steel reinforced concrete special-shaped column joints is a most important problem that must be solved to ensure that this new structural could be widely used in the future. This research focuses the attention on the seismic behavior of this kind of joints, and adopts the new joint design style. The pseudo-static test is carried out on joint specimens. Hysteresis loop of all the specimens have been drawn. The energy dissipating capacities are evaluated. Based on the results of experimental research, the behavior of high resistant capacity, excellent ductility and reliability of the joint design method have been manifested. Taking into account all these facts, this article also put forward practical design suggestions on this structure.

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“…External confinement of concrete with fiber reinforced polymer (FRP) composites has become widely accepted as a technique for enhancing strength and ductility of normal-(e.g., [1][2][3]) and highstrength (e.g., [4][5][6][7][8][9]) concretes (NSC and HSC). A large number of experimental studies into axial compressive behavior have been performed over the last two decades producing over 3000 test results, as discussed and assessed in recent comprehensive review studies [10,11].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Shrinkage Strains of Normal- and HighStrength Concrete-Filled FRP Tubes

Vincent¹

2018

Nanomaterials, Functional and Composite Materials

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Abstract.It is now well established that concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) are an attractive construction technique for new columns, however studies examining concrete shrinkage in CFFTs remain limited. Concrete shrinkage may pose a concern for CFFTs, as in these members the curing of concrete takes place inside the FRP tube. This paper reports the findings from an experimental study on concrete shrinkage strain measurements for CFFTs manufactured with normal-and high-strength concrete (NSC and HSC). A total of 6 aramid FRP (AFRP)-confined concrete specimens with circular cross-sections were manufactured, with 3 specimens each manufactured using NSC and HSC. The specimens were instrumented with surface and embedded strain gauges to monitor shrinkage development of exposed concrete and concrete sealed inside the CFFTs, respectively. All specimens were cylinders with a 152 mm diameter and 305 mm height, and their unconfined concrete strengths were 44.8 or 83.2 MPa. Analysis of the shrinkage measurements from concrete sealed inside the CFFTs revealed that embedment depth and concrete compressive strength only had minor influences on recorded shrinkage strains. However, an analysis of shrinkage measurements from the exposed concrete surface revealed that higher amounts of shrinkage can occur in HSC. Finally, it was observed that shrinkage strains are significantly higher for concrete exposed at the surface compared to concrete sealed inside the CFFTs.

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Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Cited by 299 publications

References 21 publications

Simplified analytical models for compressed concrete columns confined by FRP and FRCM system

Simplified analytical models for compressed concrete columns confined by FRP and FRCM system

Structural Performances of Steel Reinforced Concrete Special Shaped Column-Beam Joints Under Bidirectional Low-Cyclic Reversed Loading

An Experimental Study on Shrinkage Strains of Normal- and HighStrength Concrete-Filled FRP Tubes

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