Experimental and analytical studies on shear behaviors of FRP-concrete composite sections

Zou, Xingxing; Feng, Peng; Bao, Yi; Wang, Jingquan; Xin, Haohui

doi:10.1016/j.engstruct.2020.110649

Cited by 32 publications

(9 citation statements)

References 27 publications

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“…However, the design of such structures lies beyond the standard regulation field. At the same time, the bond problem complicates structural analysis and numerical modeling 18 , 19 . Still, studies 9 , 20 – 23 describe the typical analysis examples, neglecting the bond problem.…”

Section: Introductionmentioning

confidence: 99%

Developing a hybrid FRP-concrete composite beam

Garnevičius

Gribniak

2022

Sci Rep

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Current materials engineering trends put forward the development of efficient structural solutions. The steel replacement with fiber-reinforced polymers (FRP) exemplifies the key to the corrosion problem. However, the relatively low deformation modulus of typical FRP materials raises the deformations of the structural components. Together with the self-weight reduction increasing the kinematic displacements, the latter issue makes developing hybrid structures comprising compression-resistant concrete and high-performance in tension FRP profiles important. Although such hybrid systems are applicable for bridge engineering, the uncertainty of the inter-component bonding properties complicates developing these innovative structures, including the design models. The typical solution focuses on the local bond improvement, e.g., employing FRP profile perforation and mechanical anchorage systems. However, this study introduces an alternative solution, using the stress-ribbon bridge structural system for creating the hybrid beam prototype, which combines the synthetic fiber-reinforced concrete slab and pultruded FRP profile fixed on the supports. This work exemplifies the structural development concept when the finite element (FE) modeling outcome defines the target reference of the design procedure. Thus, on the one hand, this innovative structure simplifies the corresponding numerical (FE) model, which assumes the perfect bond between the components of the hybrid beam system. On the other hand, the solution to the support problem (resulting from a low resistance of pultruded FRP profiles to transverse loads) improves the structural performance of the bridge prototype, doubling the structure’s flexural stiffness and load-bearing capacity regarding the weak concrete supports’ system. The bending tests proved the adequacy of this solution in describing the design reference for further development of the proposed structural concept.

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Section: Introductionmentioning

confidence: 99%

Developing a hybrid FRP-concrete composite beam

Garnevičius

Gribniak

2022

Sci Rep

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“…The test results demonstrated that properly assembling of FRP and concrete produced excellent mechanical performance. Whereafter, the mimic composite beams were tested by Koaik et al (2017), Neagoe et al (2015) and Zou et al (2020), it was found that shear failure was occurred at the web or web-top flange joints of FRP elements at relatively low load levels. Fam and Honickman (2010) proposed the built-up trapezoidal box girder using a trapezoidal pultruded GFRP sheet pile in combination with a flat GFRP plate and concrete cast on the flat.…”

Section: Introductionmentioning

confidence: 99%

Study of the design and flexural performance of an innovative Fiber Reinforced Polymer/steel-concrete composite beam

Li¹,

Chen²,

Shi³

et al. 2022

Advances in Structural Engineering

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A novel FRP/steel-concrete composite beam consisting of concrete slab and innovative hybrid FRP/steel hollow box shell takes full advantage of inherent and complementary properties of FRP, steel and concrete. To facilitate the practical application of this novel FRP/steel-concrete composite beam, preliminary design concepts were offered while analytical equations were derived to evaluate the flexural performance of the composite beam based on analysis of typical failure modes. Three FRP/steel-concrete composite beams with different steel volume fraction had been devised by the proposed design method, and four-point bending tests were conducted to investigate the failure mode, ultimate flexural capacity, deflection and interface slip. The practical composite beams exhibited satisfying structural behavior during the tests, while a fairly good agreement with the experimental results and the estimated values confirmed the reliability and feasibility of the preliminary design method.

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“…Zhang et al [ 10 ] tested I-shaped pultruded GFRP profiles with the web strengthened by externally bonded CFRP sheets, comparing both common concrete and ultra-high concrete (UHPC) cases. Nordin et al [ 11 ] considered GFRP I-beams reinforced with CFRP in the bottom flange connected to a concrete head, while Zou et al [ 12 ] investigated the shear behavior of FRP–concrete composite sections using bending tests.…”

Section: Introductionmentioning

confidence: 99%

Flexible Fiber Fabric for FRP–Concrete Connection of Thin Hybrid Slabs

2021

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In order to combat corrosion issues, several studies on progressively replacing steel reinforcement elements with composite ones have been conducted in recent years. Hybrid steel–concrete thin slabs in which the steel acts as formwork are also candidates for update in the coming years. Achieving a reliable connection between fiber-reinforced polymer (FRP) and cast-in-place concrete is key to promoting this technology. This study analyzed different connection systems and proposes the novel approach of embedding a flexible fiber fabric as a superficially distributed connector between concrete and FRP. Eight specimens with four different connection strategies were tested using an experimental modal analysis and a quasi-static three-point bending test. The impact of the connection system on the vibrational response, flexural ultimate load, moment response, neutral axis position, shear and dissipated energy was obtained and compared. The results show that the use of an embedded mesh increases the frictional mechanism and produces the best performance in terms of load-bearing capacity and ductility.

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Experimental and analytical studies on shear behaviors of FRP-concrete composite sections

Cited by 32 publications

References 27 publications

Developing a hybrid FRP-concrete composite beam

Developing a hybrid FRP-concrete composite beam

Study of the design and flexural performance of an innovative Fiber Reinforced Polymer/steel-concrete composite beam

Flexible Fiber Fabric for FRP–Concrete Connection of Thin Hybrid Slabs

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