FRP 筋混凝土梁的抗剪承载力

doi:10.12066/j.issn.1007-2861.2027

Abstract

Abstract:

171 test beams reinforced with fiber-reinforced polymer (FRP) bars including with and without FRP stirrups were analyzed by using shear bearing capacity's formulas recommended by the Technical Code for Infrastructure Application of FRP Composites (GB 50608—2010). By comparing each beam's predicted shear strength with its corresponding experimental value, the result showed that the method adopted by the Code was highly conservative. Therefore, main factors affecting the shear capacity of FRP reinforced concrete members with shear reinforcement were analyzed by adopting the grey relational analysis. The results showed that the most important factor was effective depth of the cross section, followed by longitudinal reinforcement ratio, concrete compressive strength, the shear span ratio and so on. Accordingly, it was analyzed that the formulas in the Code underestimated the effect of effective depth of the cross section and ignored its impact on shear span ratio and so on. The formulas were revised on the basis of previous analyses and their rationality verified by using aforementioned 171 beams test data. Compared with the unrevised provision, the mean of ratio of the test to the predicted shear strength of the beams without shear reinforcement went from 4.78 down to 1.49, whereas in the case of those beams with stirrups the figure went from 2.18 down to 1.40.

Key words: fiber-reinforced polymer (FRP) bars, concrete beams, shear bearing capacity, effective depth of the cross section, shear span ratio

CLC Number:

TU37

ZHANG Zhimei, CHEN Gang, WANG Zhuo. Shear bearing capacity for concrete beams with FRP reinforcement[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(2): 301-310.

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References 21

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Shear bearing capacity for concrete beams with FRP reinforcement

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