Shear Capacity Model with Variable Orientation of Concrete Stress Field for RC Beams Strengthened by FRP with Different Inclinations

The validation of an analytical model recently proposed for evaluation of the shear capacity in Reinforced Concrete (RC) beams containing multiple inclination of transverse stirrups is presented. The model is a suitable extension of that currently proposed in Eurocode 2 for the evaluation of the shear resistance, and it is derived by means of the the variable-inclination stress-field theory based on Nielsen’s plastic approach. Experimental and numerical data available in the literature on Hybrid Steel-Trussed Concrete Beams (HSTCBs) are used for model validation and result discussion. Finally, also the comparison with a different analytical approach for the assessment of the shear resistance of HSTCBs is provided.

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The New Proposed Method to Evaluate the Shear Capacity of Tapered RC Beams without Stirrups

IABSE Symposium Report ◽

10.2749/222137816819259095 ◽

2016 ◽

Vol 106 (6) ◽

pp. 708-715

Author(s):

Chenwei HOU ◽

Takuro NAKAMURA ◽

Takayuki IWANAGA ◽

Junichiro NIWA

Keyword(s):

Shear Capacity ◽

Rc Beams

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Experimental Response of RC Beams Strengthened in Shear by FRP Sheets

The Open Civil Engineering Journal ◽

10.2174/1874149501307010127 ◽

2013 ◽

Vol 7 (1) ◽

pp. 127-135 ◽

Cited By ~ 5

Author(s):

E. Grande ◽

M. Imbimbo ◽

A. Rasulo

Keyword(s):

Slenderness Ratio ◽

Shear Capacity ◽

Rc Beams ◽

Fiber Reinforced Plastic ◽

Frp Composites ◽

Reinforced Plastic ◽

Externally Bonded ◽

Experimental Response ◽

Transverse Steel ◽

Cracking Pattern

The paper discusses the results of an experimental investigation carried out on reinforced concrete (RC) beams strengthened in shear by externally bonded fiber reinforced plastic (FRP) sheets. The study is devoted to analyze the role that the transverse steel reinforcement and the beam slenderness ratio could play on the resistant mechanism of RC beams strengthened in shear by FRP composites. The results are summarized and analyzed in detail in the paper in terms of shear capacity, cracking pattern and shear resisting contribution of FRP.

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The effects of NSM CFRP reinforcements for improving the shear capacity of RC beams

Construction and Building Materials ◽

10.1016/j.conbuildmat.2010.12.016 ◽

2011 ◽

Vol 25 (5) ◽

pp. 2663-2673 ◽

Cited By ~ 19

Author(s):

H.M. Tanarslan

Keyword(s):

Shear Capacity ◽

Rc Beams

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Shear strength of reinforced concrete beams with a fiber concrete matrix

Canadian Journal of Civil Engineering ◽

10.1139/l05-118 ◽

2006 ◽

Vol 33 (6) ◽

pp. 726-734 ◽

Cited By ~ 32

Author(s):

Fariborz Majdzadeh ◽

Sayed Mohamad Soleimani ◽

Nemkumar Banthia

Keyword(s):

Shear Strength ◽

Reinforced Concrete ◽

Fiber Volume Fraction ◽

Volume Fraction ◽

Fiber Reinforcement ◽

Shear Capacity ◽

Fiber Reinforced Concrete ◽

Rc Beams ◽

Fiber Reinforced ◽

Fiber Volume

The purpose of this study was to investigate the influence of fiber reinforcement on the shear capacity of reinforced concrete (RC) beams. Both steel and synthetic fibers at variable volume fractions were investigated. Two series of tests were performed: structural tests, where RC beams were tested to failure under an applied four-point load; and materials tests, where companion fiber-reinforced concrete (FRC) prisms were tested under direct shear to obtain material properties such as shear strength and shear toughness. FRC test results indicated an almost linear increase in the shear strength of concrete with an increase in the fiber volume fraction. Fiber reinforcement enhanced the shear load capacity and shear deformation capacity of RC beams, but 1% fiber volume fraction was seen as optimal; no benefits were noted when the fiber volume fraction was increased beyond 1%. Finally, an equation is proposed to predict the shear capacity of RC beams.Key words: shear strength, fiber-reinforced concrete, RC beam, stirrups, energy absorption capacity, steel fiber, synthetic fiber.

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