Flexural Behavior of Fire-Damaged Prefabricated RC Hollow Slabs Strengthened with CFRP versus TRM

Sui, Zheng-ang; Dong, Keyan; Jiang, Jitong; Yang, Shutong; Hu, Kexu

doi:10.3390/ma13112556

Cited by 8 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study reported an increase in cracking resistance by over 90-105% compared to control specimens. In one of its kind, hollow core one-way slabs were strengthened using CTRM post-fire exposure and the results indicate that CTRMs increased cracking load post-fire exposure (Sui et al, 2020). In addition to Carbon and PBO fibres, Basalt fibres were used to strengthen reinforced concrete slabs in this study carried out by (He et al, 2021).…”

Section: Mmms 191mentioning

confidence: 91%

See 1 more Smart Citation

Finite element modelling of reinforced concrete one-way slabs strengthened using basalt textile reinforced mortars

Revanna

Moy

2022

MMMS

View full text Add to dashboard Cite

PurposeThis paper employs a textile reinforcement strain comparison to study the response of Textile Reinforced Mortars (TRM) strengthened reinforced concrete one-way slab members in flexure using the finite element method. Basalt TRM (BTRM) is a relatively new composite in structural strengthening applications. Experimental data on BTRMs are limited in the literature and numerical analyses can help further the understanding of this composite. With this notion, Abaqus finite element software is utilised to create a numerical method to capture the mechanical response of strengthened slab members instead of time-consuming laboratory experiments.Design/methodology/approachA numerical method is developed and validated using existing experimental data set on one-way slabs strengthened using Basalt TRMs from the literature. An explicit solver is utilised to analyse the finite element model created using calibrated Concrete Damage Plasticity (CDP) parameters according to the experimental requirements. The generated model is applied to extract load, deflection and rebar strains sustained by strengthened reinforced concrete slabs as observed from the experimental reference chosen. The applicability of the developed model was studied beyond parametric studies by comparing the generated finite element tensile strain by the textile fibre with available formulae.FindingsCDP calibration done has shown its adaptability. The predicted results in the form of load versus deflection, tensile and compressive damage patterns from the numerical analysis showed good agreement with the experimental data. A parametric study on various concrete strength, textile spacing and TRM bond length obtained shows TRM’s advantages and its favourability for external strengthening applications. A set of five formulae considered to predict the experimental strain showed varied accuracy.Originality/valueThe developed numerical model considers strain sustained by the textile fibre to make results more robust and reliable. The obtained strain from the numerical study showed good agreement with the experiment results.

show abstract

Section: Mmms 191mentioning

confidence: 91%

“…The study reported an increase in cracking resistance by over 90–105% compared to control specimens. In one of its kind, hollow core one-way slabs were strengthened using CTRM post-fire exposure and the results indicate that CTRMs increased cracking load post-fire exposure (Sui et al. , 2020).…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of reinforced concrete one-way slabs strengthened using basalt textile reinforced mortars

Revanna

Moy

2022

MMMS

View full text Add to dashboard Cite

show abstract

“…Abdulah (2015) reported that the ultimate loads and capacity of the externally reinforced concrete two-way slabs with bonded CFRP sheets significantly increased when compared to the un-strengthened (control) slabs, increasing by around 7-45% depending on the type of strengthening [5]. Sui et al (2020) investigated the flexural behavior of CFRPversus-TRM-strengthened fire-damaged prefabricated RC hollow slabs. They strengthened fire-damaged prefabricated concrete hollow slabs using CFRP and textile reinforced mortar (TRM) techniques, and they revealed that both CFRP and TRM strengthening techniques can greatly raise the cracking load, peak load, and initial stiffness of fire-damaged hollow slabs [6].…”

Section: Introductionmentioning

confidence: 99%

“…Sui et al (2020) investigated the flexural behavior of CFRPversus-TRM-strengthened fire-damaged prefabricated RC hollow slabs. They strengthened fire-damaged prefabricated concrete hollow slabs using CFRP and textile reinforced mortar (TRM) techniques, and they revealed that both CFRP and TRM strengthening techniques can greatly raise the cracking load, peak load, and initial stiffness of fire-damaged hollow slabs [6]. Huang et al (2020) present one control steel-reinforced concrete (RC) slab and five CFRP-reinforced concrete slabs that were included in the six full-scale 1600 × 1600 × 150 mm slab specimens that were constructed and tested under monotonic stress until failure.…”

Section: Introductionmentioning

confidence: 99%

Post Fire Behavior of Structural Reinforced Concrete Member (Slab) Repairing with Various Materials

Elsheikh,

Alzamili

2023

Civ Eng J

View full text Add to dashboard Cite

One of the most significant building materials used to build a variety of infrastructure, military, and civil structures is concrete. It can effectively withstand fire mishaps for a long period of time. This study employs a finite element simulation approach in Three steps: the first involves applying mechanical loading, the second involves applying mechanical and thermal loading; and the third involves strengthening the damaged model. Two different strengthening procedures were used to evaluate the performance of the fire-damaged slab. Two types of strengthening techniques—carbon-fiber-reinforced polymer (CFRP) sheet and slurry-infiltrated fibrous concrete (SIFCON) jacketing—were used. Studying the performance of SIFCON and CFRP together and in two different thicknesses of each for repairing both normal and high-strength concretes after fire exposure is considered limited. An investigation of their behavior can provide insights into how effective the restoration of strength is. The study aims to assess how well various repair materials perform in restoring the durability and strength of reinforced concrete members after being exposed to fire. This will assist in determining the best materials for concrete repair after a fire. Results show that the enhancements by SIFCON with a thickness of 30 mm significantly improved many indices, including load displacement behavior, ductility, and absorption energy of the slab. Doi: 10.28991/CEJ-2023-09-08-013 Full Text: PDF

show abstract

“…Sui et al compared the bending behaviors of concrete slabs containing FRP and TRC under fire condi-tions by using the four-point bending test [8]. The results showed that reinforced hollow plates containing TRC had a higher cracking load, smaller cracking deflection, smaller peak load and larger failure deflection after exposure to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of Textile Reinforced Concrete Containing Steel Fibers and Basalt Fibers Subjected to High Temperatures

Xu¹

2021

Ceramics - Silikaty

View full text Add to dashboard Cite

Textile reinforced concrete (TRC) was prepared from high-alumina cement mixed with short-cut basalt fiber or steel fiber for the objective to analyze the mechanical performance and deterioration mechanism at high temperature. The results show that the high-temperature resistance of TRC matrix concrete can be improved by adding steel fibers and basalt fibers, but the compressive strength of concrete decreases with the increase of temperature in a quadratic parabolic law, while the flexural strength decreases in a linear law. The addition of basalt fiber significantly improves the bending bearing capacity of the TRC plates. In comparison, the addition of steel fiber significantly improves the flexural strength of TRC thin-plates above 600 °C. The scanning electron microscopy indicates that when the temperature surpasses 600 °C, the addition of basalt fiber and the steel fiber surface are significantly damaged by high-temperature deterioration. The deterioration of the mechanical performance of TRC thin-plates at high temperatures is caused mainly by changes in the chemical composition of the concrete matrix, deterioration of the fiber and damage of the bonding surface. The results obtained in this study can provide the theoretical support for the design and application of TRC in a high-temperature environment.

show abstract

Flexural Behavior of Fire-Damaged Prefabricated RC Hollow Slabs Strengthened with CFRP versus TRM

Cited by 8 publications

References 38 publications

Finite element modelling of reinforced concrete one-way slabs strengthened using basalt textile reinforced mortars

Finite element modelling of reinforced concrete one-way slabs strengthened using basalt textile reinforced mortars

Post Fire Behavior of Structural Reinforced Concrete Member (Slab) Repairing with Various Materials

Mechanical Performance of Textile Reinforced Concrete Containing Steel Fibers and Basalt Fibers Subjected to High Temperatures

Contact Info

Product

Resources

About