Experimental study on the fatigue behaviour of cracked steel beams repaired with CFRP plates

Colombi, Pierluigi; Fava, Giulia

doi:10.1016/j.engfracmech.2015.04.009

Cited by 84 publications

(49 citation statements)

References 12 publications

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“…To continue this study consider the crack growth data presented in [64] which tested edge cracked steel beams that were reinforced using pultruded CFRP doublers. The pultruded CFRP doublers (Sika CarboDur M614) had a width of 60 mm and a length of 800 mm.…”

Section: Crack Growth In Steel Structures Repaired With Cfrp Patchesmentioning

confidence: 99%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

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Section: Crack Growth In Steel Structures Repaired With Cfrp Patchesmentioning

confidence: 99%

Composite repairs to bridge steels demystified

Ali

Raman

Zhao

et al. 2017

Composite Structures

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“…H, [13] used the experimental impact testing to estimate the modal parameters of beam like structure, structural health monitoring and damage detection. Colombi P et al [14] conducted experiments to analyze the fatigue behavior of repaired and cracked steel beams. Ahmet Can Altunõsüõk et al [15] analyzed the circular cross-sectional steel cantilever beam in Ansys.…”

Section: Influence Of Crack On Modal Parameters Of Cantilever Beam Usmentioning

confidence: 99%

Influence of Crack on Modal Parameters of Cantilever Beam Using Experimental Modal Analysis

Chinka¹,

Adavi²,

Putti

2018

J. Mod. Sim. Mater.

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In this paper, the dynamic behavior of a cantilever beam without and with crack is observed. An elastic Aluminum cantilever beams having surface crack at various crack positions are considered to analyze dynamically. Crack depth, crack length and crack location are the foremost parameters for describing the health condition of beam in terms of modal parameters such as natural frequency, mode shape and damping ratio. It is crucial to study the influence of crack depth and crack location on modal parameters of the beam for the decent performance and its safety. Crack or damage of structure causes a reduction in stiffness, an intrinsic reduction in resonant frequencies, variation of damping ratios and mode shapes. The broad examination of cantilever beam without crack and with crack has been done using Numerical analysis (Ansys18.0) and experimental modal analysis. To observe the exact higher modes of beam, discretize the beam into small elements. An experimental set up was established for cantilever beam having crack and it was excited by an impact hammer and finally the response was obtained using PCB accelerometer with the help sound and vibration toolkit of NI Lab-view. After obtaining the Frequency response functions (FRFs), the natural frequencies of beam are estimated using peak search method. The effectiveness of experimental modal analysis in terms of natural frequency is validated with numerical analysis results. This paper contains the study of free vibration analysis under the influence of crack at different points along the length of the beam.

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“…Studies show that the debonding between a steel structure and the reinforcing CFRP plate is one of the main failure modes [22], which can affect the reinforcement effectiveness [23] and even cause brittleness and sudden failure of strengthened structures [24]. The debonding defects mainly occur in four areas [25]: the CFRP plate, the steel/epoxy interface, the CFRP/epoxy interface, and the epoxy layer.…”

Section: Introductionmentioning

confidence: 99%

Detecting Debonding between Steel Beam and Reinforcing CFRP Plate Using Active Sensing with Removable PZT-Based Transducers

Jiang

Deng

et al. 2019

Sensors

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Carbon fiber reinforced polymer (CFRP) plates are widely used to retrofit or reinforce steel structures, and the debonding damage between the steel structure and the CFRP plate is a typical failure in strengthening steel structures. This paper proposes a new approach to detecting debonding between a steel beam and a reinforcing CFRP plate by using removable lead zirconate titanate (PZT)-based transducers and active sensing. The removable PZT-based transducers are used to implement the active sensing approach, in which one transducer, as an actuator, is used to generate stress wave, and another transducer, as a sensor, is used to detect the stress wave that propagates across the bonding between the steel beam and the reinforcing CFRP plate. The bonding condition significantly influences the received sensor signal, and a wavelet-packet-based energy index (WPEI) is used to quantify the energy of the received signal to evaluate the severity of debonding between the steel beam and the reinforcing CFRP plate. To validate the proposed approach, experimental studies were performed, and two removable PZT-based transducers were designed and fabricated to detect the debonding between a steel beam and the reinforcing CRFP plate. The experimental results demonstrate the feasibility of the proposed method in detecting the debonding between a steel beam and the reinforcing CFRP plate using removable PZT-based transducers.

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Experimental study on the fatigue behaviour of cracked steel beams repaired with CFRP plates

Cited by 84 publications

References 12 publications

Composite repairs to bridge steels demystified

Composite repairs to bridge steels demystified

Influence of Crack on Modal Parameters of Cantilever Beam Using Experimental Modal Analysis

Detecting Debonding between Steel Beam and Reinforcing CFRP Plate Using Active Sensing with Removable PZT-Based Transducers

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