Study on Crack Behavior of RC Beams Strengthened with CFRP Sheets and Steel Plate under Fatigue Loading

被引：0

作者：

Lu Y. ^{[1
]}

Hu L. ^{[1
]}

Li S. ^{[1
]}

Wang K. ^{[1
]}

机构：

[1] School of Civil Engineering, Wuhan University, Wuhan

来源：

| 1600年 / Science Press卷 / 43期

关键词：

CFRP; Composite strengthening; Crack; Fatigue loading; RC beams; Steel plate;

D O I：

10.3969/j.issn.1001-8360.2021.06.024

中图分类号：

学科分类号：

摘要：

Flexural fatigue loading tests were carried out on an unreinforced beam and five reinforced concrete(RC) beams strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and steel plate, to study the crack behaviors on RC beams strengthened with combined CFRP sheets and steel plate under different fatigue load ranges and different number of fatigue cycles. The distribution of flexural crack spacing and crack width in the pure bending section were analyzed. The results show that with the increase of the number of cracks in composite reinforced RC beams, crack spacing and crack width are significantly reduced after the beam is strengthened with combined CFRP sheets and steel plate. On the basis of the design formulas for average crack spacing and maximum crack width under normal service conditions of RC beams strengthened with CFRP sheets and steel plate under static loading, considering the influence of fatigue stress ranges and number of cycles on the crack performance of strengthened beams, the design formula for maximum crack width of the RC beams strengthened with combined CFRP sheets and steel plate under fatigue loading was proposed. The calculated results of crack width agree well with the experimental results. © 2021, Department of Journal of the China Railway Society. All right reserved.

引用

页码：181 / 188

页数：7

共 20 条

[1]

CERONI F., Experimental Performances of RC Beams Strengthened with FRP Materials, Construction and Building Materials, 24, 9, pp. 1547-1559, (2010)

[2]

OUDAH F, EL-HACHA R., A New Ductility Model of Reinforced Concrete Beams Strengthened Using Fiber Reinforced Polymer Reinforcement, Composites Part B: Engineering, 43, 8, pp. 3338-3347, (2012)

[3]

BAKIS C E, BANK L C, BROWN V L, Et al., Fiber-reinforced Polymer Composites for Construction-state-of-the-art Review, Journal of Composites for Construction, 6, 2, pp. 73-87, (2002)

[4]

APRILE A, SPACONE E, LIMKATANYU S., Role of Bond in RC Beams Strengthened with Steel and FRP Plates, Journal of Structural Engineering, 127, 12, pp. 1445-1452, (2001)

[5]

ARSLAN G, SEVUK F, EKIZ I., Steel Plate Contribution to Load-carrying Capacity of Retrofitted RC Beams, Construction and Building Materials, 22, 3, pp. 143-153, (2008)

[6]

AYKAC S, KALKAN I, AYKAC B, Et al., Strengthening and Repair of Reinforced Concrete Beams Using External Steel Plates, Journal of Structural Engineering, 139, 6, pp. 929-939, (2013)

[7]

LU Yiyan, ZHOU Ting, Experimental Research on Flexural Performance of Reinforced Concrete Beams Combination Strengthened with Bonded Carbon Fiber Reinforced Polymer and Steel Plates, Journal of the China Railway Society, 28, 1, pp. 80-87, (2006)

[8]

LU Yiyan, ZHOU Ting, ZHAO Guofan, Calculation Analysis of Resisting Flexural Strength of RC Beams Strengthened by Combination of CFRP and Steel Plate, Journal of Hydroelectric Engineering, 25, 3, pp. 77-83, (2006)

[9]

LU Yiyan, ZHOU Ting, Calculation of Sectional Stiffness of RC Beams Combination Strengthened with CFRP and Steel Plates, Journal of the China Railway Society, 29, 1, pp. 72-76, (2007)

[10]

LU Yiyan, ZHOU Ting, ZHANG Wei, Ductility Analysis of RC Beams Strengthened with Carbon Fiber Reinforced Polymer and Steel Plate, Journal of Harbin Institute of Technology, 38, 11, pp. 1939-1942, (2006)

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