Effect of reinforcement ratio on the flexural performance of hybrid FRP reinforced concrete beams

Qin, Renyuan; Zhou, Ao; Lau, Denvid

doi:10.1016/j.compositesb.2016.09.054

Cited by 151 publications

(83 citation statements)

References 26 publications

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“…To predict the structural behaviour of FRP bonded in a macroscale manner, the interfacial parameters generated by MD simulation can be converted into finite element simulation using cohesive zone model (CZM), which is widely used in simulating the fracture process in polymers, metals and composites [116][117][118]. CZM was first introduced as a technique to study the fracture in quasi-brittle materials such as ceramic and concrete.…”

Section: Macroscale Model Using Finite Element Methodsmentioning

confidence: 99%

Evaluation of the Moisture Effect on the Material Interface Using Multiscale Modeling

Qin

Lau

2019

Multiscale Sci. Eng.

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Layered material systems are widely seen in various engineering applications such as thin films circuit boards in electronic engineering, lipid bilayer in biological engineering, and adhesive bonding in aerospace and civil engineering applications. However, the durability of the material interface can be seriously affected due to the prolonged exposure to water. Although the experimental studies have shown the reduction in terms of ultimate bond strength and fracture toughness for material interface, the shift in failure mode found in experiment cannot be explained using conventional fracture theory, which is related to the interaction between the water and material interface. To understand the debonding mechanism from a fundamental and comprehensive aspect and bridge knowledge from the atomistic scale to continuum scale, multiscale modeling approach has been proposed to study the debonding behavior of material interface under moisture effect. A number of studies have been conducted using multiscale modeling approach to investigate the debonding of material interface, and it is necessary to summarize these studies to understand the role of water molecules in weakening and diffusing at the material interface using different atomistic models, force fields and upscaling techniques. This paper provides a comprehensive review on the multiscale modeling of interfacial and delamination behavior of layered material system under moisture attack with the focus on the molecular dynamics simulation and finite element modeling. The FRP bonded concrete system is used as a representative to demonstrate the approach of multiscale modeling. The future research direction is recommended, which involves the consideration of roughness of substrate and structural voids at interface for the better understanding of durability issue for interface in layered material system under different environmental conditions.

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Section: Macroscale Model Using Finite Element Methodsmentioning

confidence: 99%

Evaluation of the Moisture Effect on the Material Interface Using Multiscale Modeling

Qin

Lau

2019

Multiscale Sci. Eng.

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“…In other words, the compatibility between the modelling used in this study and the test results of static push-over tests conducted by Cho et al (2012), for general studs, has already been examined. Many studies based on numerical analyses using computers (Duarte et al, 2016;Kim et al, 2016;Lim et al, 2016;Ozcelik and Clayton, 2017;Qin et al, 2017;Ren et al, 2015) have been carried out. The professional FEA program Abaqus, which reasonably analyses the non-linear behaviour of SC shear walls, was utilised in the current study.…”

Section: Finite-element Analyses Of Sc Shear Wallsmentioning

confidence: 99%

Research on steel-plate–concrete walls with inclined studs under combined loads

Lim¹,

2018

Proceedings of the Institution of Civil Engineers - Structures

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A numerical study was conducted to investigate the effect of the shape and spacing of developed inclined studs on the behaviour of steel-plate-concrete shear walls subject to combined loads of axial force, bending moment and shear. Finite-element analyses considering different shapes and stud spacings were carried out. The results showed that the compressive strength of the steel-plate-concrete walls was approximately three times higher than their tensile strength. Comparing the numerical analyses with designs based on the Korean electric power industry code confirmed that all specimens had higher capacities than the design strengths. However, using the design code, the moment capacity and shear strength were not influenced by an axial force of 0·1-0·2 times the axial strength. Finiteelement analysis confirmed that, with higher axial force, the moment capacity and shear strength decreased.

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“…Therefore, serviceability limit state is generally controlling the design of FRP reinforced concrete structures [6][7][8][9][10][11][12] . Hybrid reinforced concrete structures [21][22][23][24][25][26][27][28] , where FRP reinforcement located closer to the external environment and steel bars embedded in concrete with largest possible cover, combine the advantage of ductility and durability of steel or FRP reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flexural behavior of ECC-concrete composite beams reinforced with FRP bars

Ashour

Cao

et al. 2019

Composite Structures

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This paper presents test results of fifteen reinforced engineered cementitious composite (ECC)-concrete beams. The main parameters investigated were the amount and type of reinforcement, and ECC thickness. All reinforced ECC-concrete composite beams tested were classified into four groups according to the amount and type of main longitudinal reinforcement used; three groups were reinforced with FRP, steel and hybrid FRP/steel bars, respectively, having similar tensile capacity, whereas the fourth group had a larger amount of only FRP reinforcement. In each group, four height replacement ratios of ECC to concrete were studied. The test results showed that the moment capacity and stiffness of concrete beams are improved and the crack width can be well controlled when a concrete layer in the tension zone is replaced with an ECC layer of the same thickness. However, the improvement level of ECC-concrete composite beams was controlled by the type and amount of reinforcement used. Based on the simplified constitutive relationships of materials and plane section assumption, three failure modes and their discriminate formulas are developed. Furthermore, simplified formulas for moment capacity calculations are proposed, predicting good agreement with experimental results.

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Effect of reinforcement ratio on the flexural performance of hybrid FRP reinforced concrete beams

Cited by 151 publications

References 26 publications

Evaluation of the Moisture Effect on the Material Interface Using Multiscale Modeling

Evaluation of the Moisture Effect on the Material Interface Using Multiscale Modeling

Research on steel-plate–concrete walls with inclined studs under combined loads

Experimental study on flexural behavior of ECC-concrete composite beams reinforced with FRP bars

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