Analytical Solution for Fracture Analysis of CFRP Sheet–Strengthened Cracked Concrete Beams

Wu, Zhenlin; Yang, Shizhong; Hu, Xiaozhi; Zheng, Jianjun; Fan, Xinping; Shan, Jingsong

doi:10.1061/(asce)em.1943-7889.0000157

Cited by 18 publications

(15 citation statements)

References 18 publications

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“…The maximum shear stress s bM is obtained by plugging F, which has been obtained from the above-described structural analysis, into a bond-slip model, which can be borrowed from literature, where there is a rich supply of papers on the bond behavior [1,4,6,7,9,11,12,[16][17][18][19][20][21]37,38].…”

Section: From the Macroscale To The Mesoscalementioning

confidence: 99%

“…According to fracture mechanics of brittle materials, the velocity da/dt (t denotes the time) at which the crack propagates in a given concrete depends on the ratio between K II and K IIC only [4,6,9,[18][19][20]25,29,34,35,[40][41][42]. In brittle materials there are three regimes of crack growth as K II varies from 0 to its critical value K IIC .…”

Section: Dynamics Of Fracture Propagation At the Mesoscalementioning

confidence: 99%

“…There are many models in the literature to calculate the s b distribution and their maximum, which is herein denoted by s bM [2][3][4]6,9,[11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analytical model to predict the lifetime of concrete members externally reinforced with FRP

Foraboschi

2015

Theoretical and Applied Fracture Mechanics

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Section: From the Macroscale To The Mesoscalementioning

confidence: 99%

Section: Dynamics Of Fracture Propagation At the Mesoscalementioning

confidence: 99%

See 1 more Smart Citation

Analytical model to predict the lifetime of concrete members externally reinforced with FRP

Foraboschi

2015

Theoretical and Applied Fracture Mechanics

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“…It is worth noting that since FRP laminate can hinder the crack propagation in concrete and thus reduce the crack width, some analytical and numerical investigations have been conducted through finite element analysis (FEA) on the strengthening and fracture behavior of conventional concrete beams [16,17].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification and simulation of fracture behavior of CFRP reinforced self-consolidating concrete beams with initial notch

et al. 2020

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The current study presents numerical and experimental approaches in the assessment of fracture behavior of self-consolidating concrete beams strengthened with carbon fiber-reinforced polymer (CFRP) lamina. The failure modes, mid-span displacement, and the load-bearing capacity of specimens with initial notches at mid-span are analyzed by varying the notch length and the beam height. Furthermore, the effects of variations in CFRP and concrete mechanical properties, bond strength, and notch location are examined by using the non-linear finite element analysis. Findings reveal that stress concentration in concrete and CFRP, in the vicinity of initial notch, as well as the failure of specimens occur as a result of CFRP debonding and crack extension. Moreover, it is observed that load-mid-span displacement curves are characterized by two peak load points strength. At the first stage, the applied load increases up to one peak value and then at the second stage there is a drop in the load-caring capacity. The applied load is then improved to another peak value due to the relatively high cohesive effect of the CFRP sheet at the third stage. Among different variables, the second peak load shows higher sensitivity to variations of the elastic modulus of CFRP, and bond strength at interface. As the notch approaches the beam support, and hence the relative distance from mid-span changes from 0 to 2/3, the two peak loads are respectively escalated by 116 and 58%, and thus the inclined crack propagates toward mid-span.

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“…Wu and Yin 19 performed a Enite element analysis to investigate different types of debonding propagation along the FRP-concrete interface and crack growth in concrete with the smeared crack model. Wu et al 20 proposed an analytical method for the loadbearing capacity of FRP-strengthened cracked concrete beams. In their method, the tensile-softening behavior of concrete was considered and interfacial debonding was modeled.…”

Section: Introductionmentioning

confidence: 99%

Modeling of debonding and fracture process of FRP-strengthened concrete beams via fracture mechanics approach

Fan

Zheng

et al. 2013

Journal of Reinforced Plastics and Composites

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Fiber-reinforced polymer (FRP) composite materials have been widely used in the field of retrofitting. To estimate their service reliability, it is necessary to conduct a theoretical analysis of FRP-strengthened concrete beams. In this paper, a fracture mechanics approach is presented to model the cracking behavior of and interfacial debonding process in FRP-strengthened concrete beams. The K-superposition method is adopted to calculate the net stress intensity factor at the crack tip. After the validity of the proposed approach is verified with experimental results obtained from the literature, the effects of various factors on the load-bearing capacity and crack growth resistance of FRP-reinforced concrete beams are quantitatively evaluated. It is found that the first peak load increases as the beam height and compressive strength of concrete increase or the ratio of the initial crack length to beam height decreases, whereas the second peak load is an increasing function of the FRP sheet thickness and width. It is also found that the crack growth resistance increases with an increase in ratio of the initial crack length to beam height and FRP sheet thickness and width but is seldom influenced by the beam height and compressive strength of concrete.

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Analytical Solution for Fracture Analysis of CFRP Sheet–Strengthened Cracked Concrete Beams

Cited by 18 publications

References 18 publications

Analytical model to predict the lifetime of concrete members externally reinforced with FRP

Analytical model to predict the lifetime of concrete members externally reinforced with FRP

Experimental verification and simulation of fracture behavior of CFRP reinforced self-consolidating concrete beams with initial notch

Modeling of debonding and fracture process of FRP-strengthened concrete beams via fracture mechanics approach

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