Bending and time-dependent responses of RC beams strengthened with bonded carbon fiber composite laminates

Sobuz, Md. Habibur Rahman; Ahmed, Ehsan; Sutan, Norsuzailina Mohamed; Hasan, Noor; Uddin, Md. Alhaz; Uddin, Md. Jahir

doi:10.1016/j.conbuildmat.2011.11.006

Cited by 25 publications

(19 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e FE model in this paper has been further validated against the test results in other literatures [42,43]. Totally, seven specimens are selected herein: four of them are from Sobuz et al [42] including one control beam (not strengthened) and three CFRP-strengthened beams and the other three are from Tan and Saha [43]. Sobuz et al [42] Advances in Materials Science and Engineering studied the e ects of strengthening scheme and level of sustained load on long-term response of RC beam strengthened by CFRP.…”

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

“…Totally, seven specimens are selected herein: four of them are from Sobuz et al [42] including one control beam (not strengthened) and three CFRP-strengthened beams and the other three are from Tan and Saha [43]. Sobuz et al [42] Advances in Materials Science and Engineering studied the e ects of strengthening scheme and level of sustained load on long-term response of RC beam strengthened by CFRP. Four representative specimens are selected herein to demonstrate the accuracy of the proposed FE approach, namely, CBC (not strengthened, the control beam), FBC-1L, FBC-2L, and FBC-3L.…”

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

“…According to Sobuz et al [42] and Tan and Saha [43], the viscoelasticity of FRP plate was ignored. e aging e ect of concrete was considered based on the aforementioned method in Section 3.2.…”

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

“…e aging e ect of concrete was considered based on the aforementioned method in Section 3.2. For the specimens from Sobuz's test [42], the ultimate creep coe cient and ultimate shrinkage strain of concrete were 1.87 and 418 με, which were determined through 3. [42].…”

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

See 3 more Smart Citations

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

Jiang

Yao

Chen

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

External bonding of FRP laminates to the tension soffit of concrete members has become a popular method for flexural strengthening. However, the long-term field performance of FRP-strengthened RC members under service conditions is still a concern, and more work needs to be done. Based on concrete smeared-crack approach, this paper presents a finite-element (FE) model for predicting long-term behavior of FRP-strengthened RC beam, which considers the time-dependent properties of all components including the aging effect of concrete. According to the comparison between theoretical predictions and test results, the validity of the FE model is verified. The interfacial edge stresses in adhesive layer were determined through appropriate mesh refinement near the plate end, and their time-dependent characteristics were investigated. The results show that creep of concrete and epoxy resin cause significant variations of the edge stresses with time. According to the research in this paper, the FE approach is found to be able to properly simulate the long-term behavior of the FRP-strengthened beam and help us better understand the complex changes in the stress state occurring over time.

show abstract

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

Section: Verification Of the Recommended Fe Model Under Instantaneoumentioning

confidence: 99%

See 2 more Smart Citations

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

Jiang

Yao

Chen

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…The creep of the widened new bridge develops as a result of the effect of self-weight without the constraint of the old bridge. However, reinforcement constraint will result in stress redistribution (Sobuz et al, 2012;Tan and Saha, 2006). …”

mentioning

confidence: 98%

Numerical simulation of creep and shrinkage in widened concrete bridges

Wen

Jing

2014

Magazine of Concrete Research

View full text Add to dashboard Cite

Creep and shrinkage of concrete can cause cracking or damage when original old bridges that are widened directly by new bridges in a lateral direction experience constrained stress and deformation. This paper presents a numerical method to evaluate creep and shrinkage based on Newmark's methods. In addition, an example of an actual bridge widening process was analysed to obtain displacement and stress redistribution and compared with calculations from a finite-element method. The results validate the precision of the numerical method and show that the displacement of the new and old bridges, as well as the stress exerted on them, will not lead to concrete cracking.However, creep and shrinkage make significant contributions in the first 3 months and therefore it is suggested that bridge widening is carried out when new bridges are 3 months old. NotationA s area of reinforcement A y area of prestressing tendons b 1 width of the box girder b 2 width of flange slabs of the box girder c height from centre of tendons to bottom slab E(t, t 0 ) equivalent elastic modulus of concrete from initial time t 0 to any time t E c (t ) elastic modulus of concrete at time t E c (t 0 ) elastic modulus of concrete at time t 0

show abstract

Creep analysis of E‐glass/vinyl‐ester laminated composites for underground vault structures

Youssef

2020

Polymer Composites

View full text Add to dashboard Cite

Creep is eminent in fiber reinforced polymer matrix composite materials given the susceptibility of polymers to constant loading. The response of polymer matrix composites used in retrofitting vital infrastructure to long‐term flexural loadings is investigated to elucidate the effect of creep. The experimental approach consisted of first establishing a benchmark of the quasi‐statically tested flexural properties. A fresh set of samples were then flexural tested for an extended period. Failure was determined to be strain‐driven in both quasi‐static and long‐term testing conditions. The mechanical properties were found to be insensitive to the strain rate (in the low strain regime), while being mildly sensitive to creep loading. The flexural response also showed dependence on the historic creep loading. The creep strain was successfully fitted into Baily‐Norton power law, which allowed for forecasting the creep life based on the critical strain failure criteria. The overall results explicate the interrelation between long‐term loading and fidelity of composites‐based infrastructures.

show abstract

Bending and time-dependent responses of RC beams strengthened with bonded carbon fiber composite laminates

Cited by 25 publications

References 18 publications

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

Finite Element Modeling of FRP‐Strengthened RC Beam under Sustained Load

Numerical simulation of creep and shrinkage in widened concrete bridges

Creep analysis of E‐glass/vinyl‐ester laminated composites for underground vault structures

Contact Info

Product

Resources

About