Theoretical and Numerical Study on Stress Intensity Factors for FRP-Strengthened Steel Plates with Double-Edged Cracks

Wang, Haitao; Wu, Gang; Pang, Yanjun

doi:10.3390/s18072356

Cited by 35 publications

(27 citation statements)

References 42 publications

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“…e test and analysis results show that the crack growth rate increases with the increase in the stress level, and a calculation model was proposed to describe the change law between the crack growth rate and the stress level [6]. Numerical and theoretical investigations were conducted on a CFRP-strengthened cracked steel plate by considering the stress intensity factors, and numerical results and theoretical results were compared to validate the proposed expressions [7]. In addition, the bond behavior of FRP-concrete interface under sustained loading was studied for reliability analysis, and the CFRP-concrete fracture energy of the bond behavior was directly obtained by the measured local bond-slip curves.…”

Section: Introductionmentioning

confidence: 99%

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

Yuan

Zhu

Zheng³

et al. 2020

Mathematical Problems in Engineering

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This paper investigates the flexural behavior of CFRP plate-strengthened concrete structures. Specimens of the CFRP plate-reinforced beam were designed and tested by the four-point flexural test. The load-deflection relationship, failure modes, and crack propagation were analyzed. The results showed that the postcracking stiffness and bearing capacity of the test beams can be improved by the additional anchoring measures for CFRP strengthening. The relationship between flexural moment and curvature was analyzed by introducing a MATLAB program. The calculation model between curvature, flexural moment, and stiffness was derived for the CFRP plate-strengthened structure. The recommended calculation model was applied in the analysis of deflection, and the theoretical values were compared with the test results.

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Section: Introductionmentioning

confidence: 99%

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

Yuan

Zhu

Zheng³

et al. 2020

Mathematical Problems in Engineering

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“…In recent years, FRP has been widely used in the field of civil engineering [ 37 , 38 , 39 , 40 ] because of its advantages of high strength, corrosion resistance, light-weight, simple construction, and so on. Many experts began to use FRP to strengthen many kinds of materials [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. Wang [ 41 ] tried to strengthen double-edged cracked steel plates by FRP.…”

Section: Introductionmentioning

confidence: 99%

“…Many experts began to use FRP to strengthen many kinds of materials [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. Wang [ 41 ] tried to strengthen double-edged cracked steel plates by FRP. Liu [ 42 ] presented a crack monitoring method for an FRP-strengthened steel structure deploying a microstrip antenna sensor.…”

Section: Introductionmentioning

confidence: 99%

AFRP Influence on Parallel Bamboo Strand Lumber Beams

Zhang

Corbi

et al. 2018

Sensors

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The mechanical properties of parallel bamboo strand lumber beams could be improved by aramid fiber reinforced polymer (AFRP). So far, no investigation has been conducted on the strengthening of engineering bamboo beams using AFRP. In order to study the efficiency of AFRP reinforcement on parallel bamboo strand lumber beams, 13 beams had been tested and analyzed. Strain gauges and Laser Displacement Sensors were used for the tests. By sensing the strain and deformation data for the specimens under the applied loads, the results showed that AFRP can effectively improve the flexural mechanical properties of parallel bamboo strand lumber beams. However, this reinforcement cannot increase the deflection of bamboo beams indefinitely. When the cloth ratio was 0.48, the deflection of the specimens reached its maximum. With the increase of cloth ratio, the stiffness of parallel bamboo strand lumber beams was increasing. When the cloth ratio reached 0.72%, compared with the un-reinforced specimen, the stiffness increased by 15%. Therefore, it can be inferred that bonding AFRP on the considered specimens can increase the stiffness of parallel bamboo strand lumber beams. The ductility of the specimen can be effectively enhanced by adopting the AFRP provision.

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“…Fiber-reinforced polymer (FRP) composites have become a favorite material of professionals in both engineering and construction due to its advantages. Major ones include lightweight, high strength, and construction convenience [ 8 , 9 , 10 , 11 , 12 , 13 ]. FRP composites provide excellent corrosion resistance, which keeps costs down and increases the service life of structural materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aggregate Types on the Stress-Strain Behavior of Fiber Reinforced Polymer (FRP)-Confined Lightweight Concrete

Sui

Xing

et al. 2018

Sensors

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The realization of reducing concrete self-weight is mainly to replace ordinary aggregates with lightweight aggregates; such replacement usually comes with some intrinsic disadvantages in concrete, such as high brittleness and lower mechanical properties. However, these shortages can be effectively remedied by external confinement such as fiber reinforced polymer (FRP) jacketing. To accurately predict the stress-strain behavior of lightweight concrete with lateral confinement, it is necessary to properly understand the coupling effects that are caused by diverse aggregates types and confinement level. In this study, FRP-confined lightweight concrete cylinder with varying aggregate types were tested under axial compression. Strain gauges and linear variable displacement transducers were used for monitoring the lateral and axial deformation of specimens during the tests. By sensing the strain and deformation data for the specimens under the tri-axial loads, the results showed that the lateral to axial strain relation is highly related to the aggregate types and confinement level. In addition, when compared with FRP-confined normal weight aggregate concrete, the efficiency of FRP confinement for lightweight concrete is gradually reduced with the increase of external pressure. Replace ordinary fine aggregate by its lightweight counterparts can be significantly improved the deformation capacity of FRP-confined lightweight concrete, meanwhile does not lead to the reduction of compressive strength. Plus, this paper modified a well-established stress-strain model for an FRP-confined lightweight concrete column, involving the effect of aggregate types. More accurate expressions pertaining to the deformation capacity and the stress-strain relation were proposed with reasonable accuracy.

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Theoretical and Numerical Study on Stress Intensity Factors for FRP-Strengthened Steel Plates with Double-Edged Cracks

Cited by 35 publications

References 42 publications

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

AFRP Influence on Parallel Bamboo Strand Lumber Beams

Effects of Aggregate Types on the Stress-Strain Behavior of Fiber Reinforced Polymer (FRP)-Confined Lightweight Concrete

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