Effect of Strain Rates on the Stress–Strain Behavior of FRP-Confined Pre-Damaged Concrete

Cao, Yugui; Liu, Muyu; Zhang, Yang; Hu, Jun; Yang, Shengchun

doi:10.3390/ma13051078

Cited by 10 publications

(13 citation statements)

References 31 publications

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“…Figure 5 shows that the strain rate

\overset{ε}{true}

has a great influence on the stress–strain relationship of FRP‐confined concrete 22 . With increasing strain rate, the stiffness and compressive strength of the stress–strain curve increase.…”

Section: Strength Model For Frp‐confined Damaged Concrete Under Diffe...mentioning

confidence: 99%

“…In this article, 350 experimental data were collected from published literature 12,19–23,32–36 . Part of the test data is used to fit unknown parameters, and part of the data is used to verify the accuracy of the model.…”

Section: Databasementioning

confidence: 99%

“…Where

{\overset{true¯}{f}}_{italiccc . d}

is the compressive strength of FRP‐confined damaged concrete columns under different strain rates, the strain rate of ε o is 3.3 × 10 −5 /s, and f 30 indicates a concrete strength of 30 MPa 22 …”

Section: Strength Model For Frp‐confined Damaged Concrete Under Diffe...mentioning

confidence: 99%

“…The existing literature has shown that the strain rate has a significant effect on the compressive strength of FRP-confined undamaged concrete columns. [22][23][24][25][26] Zhang et al 24,25 carried out dynamic loading tests on FRP-confined concrete columns under different strain rates and established empirical strength model that considered strain rates. Zhang 26 carried out uniaxial compression tests and a theoretical analysis on 84 FRP-confined concrete columns under strain rates, studied the influence of different wrapping layers, concrete strengths and different strain rates on the compressive strength of CFRP-confined concrete columns, and established a strength model considering the strain rate based on the test data.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a compressive strength model for FRP‐confined damaged concrete columns based on the Drucker–Prager yield criterion

Zhang

Xiong

Musa

et al. 2022

Structural Concrete

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Fiber reinforced polymer (FRP) has been widely used in repairing and strengthening of damaged concrete columns due to its excellent material properties. Most of the existing compressive strength models for FRP-confined concrete columns have been established through regression analyses of experimental data, and only a few models were established based on theoretical derivation. Therefore, to extend these compressive strength models based on theoretical derivation, a new strength model based on the Drucker-Prager yield criterion was established in this article, which is suitable for predicting the strength of FRP-confined circular and square concrete columns with loaddamaged, fire-damaged and strain rate. To study the strength model of FRPconfined concrete columns, the author collected 675 test data from published literature and built a large database containing cross-section type, damage type, damage degree and strain rate. In this database, most of the existing strength models in the published literature and the model proposed in this article were evaluated. The evaluation results show that the model can accurately predict the compressive strength of FRP-confined circular and square concrete columns with undamaged, load-damaged, fire-damaged and strain rate.

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“…Figure 5 shows that the strain rate

\overset{ε}{true}

Section: Strength Model For Frp‐confined Damaged Concrete Under Diffe...mentioning

confidence: 99%

Section: Databasementioning

confidence: 99%

“…Where

{\overset{true¯}{f}}_{italiccc . d}

Section: Strength Model For Frp‐confined Damaged Concrete Under Diffe...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of a compressive strength model for FRP‐confined damaged concrete columns based on the Drucker–Prager yield criterion

Zhang

Xiong

Musa

et al. 2022

Structural Concrete

Self Cite

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show abstract

“…_ ε s is the strain rate and _ ε s0 the strain rate at the quasi-static state, _ ε s0 � 50 × 10 − 5 s − 1 . It should be noted that as the character of the strain rate effect of FRP is still not evident now [25], the change of strength for FRP under high strain rate is neglected.…”

Section: Materials Modelmentioning

confidence: 99%

Effect of CFRP Shear Strengthening on the Flexural Performance of the RC Specimen under Unequal Impact Loading

Liu

Al-Bukhaiti

Abas

et al. 2020

Advances in Materials Science and Engineering

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Strengthening with externally bonded CFRP reinforcement is widely used in structural reinforcement and attractive to stakeholders and engineers because of ease and speed of construction, corrosion resistance, lightweight, high strength, and versatility stiffness which can be oriented according to the need. Numerous research studies were carried out to explore RC beams’ flexural and shear performance when subjected to dynamic impact loading. The results were auspicious in using such a technique of strengthening. Regular square section reinforced concrete frame members strengthened by CFRP material is taken as the research object. However, little attention to the impact behavior of CFRP-shear-strengthened square reinforced concrete (RC) specimens has been paid. The dynamic response of CFRP to reinforced concrete members under unequal cross-impact is discussed. This paper investigates the effectiveness of CFRP strengthening on the square RC specimen in preventing shear failure and evaluation of the flexural performance of the strengthened specimen under the impact load. The drop hammer impact test is firstly conducted on RC specimens with and without CFRP strengthening. The results show that using CFRP to strengthen the RC specimen in shear is very effective at preventing shear failure and leading the specimen’s response to flexural domination. This result is also the motivation for developing a numerical model supported by experimental tests to study the flexural performance of strengthened RC specimens. It is found that the strengthened specimen is prone to exhibit pure bending deformation under the impact load in terms of dynamic amplification factor (DAF) for section moment. Then, an extensive parameter study is carried out to evaluate further the influence of impact velocity, reinforcement ratio, and concrete strength on the flexural performance of the strengthened specimen and CFRP layers. Such a holistic study may provide preliminary research regarding the use of CFRP to strengthen RC specimens in shear under impact loads and will enhance the current state of knowledge in this area; also, the optimal value of the CFRP reinforcement layer was proposed.

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Unified strength model based on the Hoek-Brown failure criterion for fibre-reinforced polymer-confined pre-damaged concrete columns with circular and square cross sections

Zhang

Cao

2020

J. Cent. South Univ.

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Effect of Strain Rates on the Stress–Strain Behavior of FRP-Confined Pre-Damaged Concrete

Cited by 10 publications

References 31 publications

Analysis of a compressive strength model for FRP‐confined damaged concrete columns based on the Drucker–Prager yield criterion

Analysis of a compressive strength model for FRP‐confined damaged concrete columns based on the Drucker–Prager yield criterion

Effect of CFRP Shear Strengthening on the Flexural Performance of the RC Specimen under Unequal Impact Loading

Unified strength model based on the Hoek-Brown failure criterion for fibre-reinforced polymer-confined pre-damaged concrete columns with circular and square cross sections

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