scholarly journals Experimental and Numerical Study of Shear Interface Response of Hybrid Thin CFRP–Concrete Slabs

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5184
Author(s):  
Amir Mahboob ◽  
Lluís Gil ◽  
Ernest Bernat-Maso ◽  
Amir Reza Eskenati
Keyword(s):  
Glass Fiber ◽  
Numerical Study ◽  
Strength Properties ◽  
Fiber Reinforced Polymer ◽  
Concrete Slabs ◽  
The Finite Element Method ◽  
Interface Shear ◽  
Reinforced Polymer ◽  
Fiber Mesh ◽  
Shear Interface

Hybrid slabs made of carbon-fiber-reinforced polymer (CFRP) and concrete provide a solution that takes advantage of the strength properties of both materials. The performance of the system strongly depends on the CFRP–concrete interaction. This study investigates the shear behavior in the interface of the two materials. Eight full-scale experiments were carried out to characterize the interface shear response of these hybrid elements using different connection solutions. An untreated surface is compared to a surface with aggregates, with a novel system comprising a flexible, straight glass fiber mesh and an inclined glass fiber mesh. The experimental results show that the fabric connection improves the friction between materials and is responsible for the pseudo-plastic performance of the specimens. The inclined mesh produces a more uniform tightening effect compared to the straight mesh. In simulations via the finite element method, we used an adjusted frictional model to reproduce the experiments.

Pipe Stiffness Prediction of Buried Glass Fiber Reinforced Polymer Plastic (GFRP) and Polymer Mortar Pipe

2017 ◽  
Vol 753 ◽  
pp. 3-7
Author(s):  
Jae Ho Lee ◽  
Sun Hee Kim ◽  
Won Chang Choi ◽  
Soon Jong Yoon
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Glass Fiber ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
The Finite Element Method ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Polymer Mortar

Recently, glass fiber reinforced polymer plastic (GFRP) pipes are widely used in the water-supply system because of their advantages such as light-weight, corrosion resistance, etc. In previous study, we present the equation to predict stiffness factor (EI) of GFRP pipe with two tape-winding FRP layers and polymer mortar layer in between two FRP layers. As a result, it was able to predict in the range of -3% to +7%. In addition to previous study, we attempted to predict stiffness factor (EI) of GFRP pipe by the finite element method (MIDAS Civil 2016). From the study it was found that the finite element method can be used to predict the pipe stiffness of GFRP pipe.

scholarly journals Influence of Bracing on Buckling Strength of Pultruded Glass Fiber Reinforced Polymer Frames

2020 ◽  
Vol 5 (10) ◽  
pp. 1237-1239
Author(s):  
Mojtaba B. Sirjani ◽  
Zia Razzaq
Keyword(s):  
Glass Fiber ◽  
Numerical Study ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Axis Orientation ◽  
Buckling Strength ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Column Bases

A numerical study of the influence of structural bracing on the buckling strength of pultruded Glass Fiber Reinforced Polymer (GFRP) frames is presented. Although the influence of bracing on frames made from other materials such as steel have been studied in the past, this paper investigates the performance of pultruded GFRP portal frames with pinned or fixed column bases. Each frame is constructed with pultruded GFRP I-section members. The influence of I-section column major and minor axis orientation is also investigated. The results demonstrate the practical significance of bracing pultruded GFRP frames. The results show that the buckling loads for braced frames are seven to nine times greater than those for unbraced frames when the column bases are pinned. The corresponding gain in the buckling load capacity due to the addition of bracing is more than three times if the column bases are fixed.

scholarly journals Punching Shear Behavior of Two-Way Concrete Slabs Reinforced with Glass-Fiber-Reinforced Polymer (GFRP) Bars

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 893 ◽  
Author(s):  
Minkwan Ju ◽  
Kyoungsoo Park ◽  
Cheolwoo Park
Keyword(s):  
Shear Strength ◽  
Glass Fiber ◽  
Fiber Reinforced Polymer ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Rc Beam ◽  
Glass Fiber Reinforced Polymer ◽  
Gfrp Bars ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

This study investigated the punching shear behavior of full-scale, two-way concrete slabs reinforced with glass fiber reinforced polymer (GFRP) bars, which are known as noncorrosive reinforcement. The relatively low modulus of elasticity of GFRP bars affects the large deflection of flexural members, however, applying these to two-way concrete slabs can compensate the weakness of the flexural stiffness due to an arching action with supporting girders. The test results demonstrated that the two-way concrete slabs with GFRP bars satisfied the allowable deflection and crack width under the service load specified by the design specification even in the state of the minimum reinforcement ratio. Previous predicting equations and design equations largely overestimated the measured punching shear strength when the slab was supported by reinforced concrete (RC) girders. The strength difference can be explained by the fact that the flexural behavior of the supporting RC beam girders reduces the punching shear strength because of the additional deflection of RC beam girders. Therefore, for more realistic estimations of the punching shear strength of two-way concrete slabs with GFRP bars, the boundary conditions of the concrete slabs should be carefully considered. This is because the stiffness degradation of supporting RC beam girders may influence the punching shear strength.

scholarly journals The Impact of Methods of Forming on the Mechanical Properties of Fiber-reinforced Polymer-matrix Composite Materials

2015 ◽  
Vol 2 (1) ◽  
pp. 5-12 ◽  
Author(s):  
Krzysztof Piernik ◽  
Irena Chatys ◽  
Rafał Chatys
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Composite Laminates ◽  
Fibrous Composite ◽  
Strength Properties ◽  
Fiber Reinforced Polymer ◽  
Polymer Resin ◽  
Reinforced Polymer ◽  
Polyester Matrix ◽  
The Impact

Abstract The aim of this paper was to analyze how different techniques of production of fibrous composite materials affect the quality and strength properties of composite laminates. In this study, we use experimental data concerning a composite fabricated with the by hand lay-up and vacuum bagging method. The composites have a polyester matrix (Firestop 8175-w-1) reinforced with mate-glass fiber fabric [0/90/0/90] E glass fiber, respectively. The process parameters and criteria were determined before the samples were cut, namely the amount and soaking time of the composite with the polymer resin.

scholarly journals Analytical and Numerical Study of Glass Fiber-Reinforced Polymer (GFRP) strengthened Steel Tube under Axial Compression

2021 ◽  
Vol 9 (VI) ◽  
pp. 511-519
Author(s):  
Tushar P. Patil
Keyword(s):  
Glass Fiber ◽  
Numerical Study ◽  
Steel Tube ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Steel Tubes ◽  
Hollow Section ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

This article presents the results of an analytical and numerical study of the behaviour of circular hollow section (CHS) steel tubes strengthened by Glass fiber-reinforced polymer (GFRP). Glass, aramid, carbon etc. fiber composites are considered for strengthening applications. In this work, glass fiber is used and it is the most popular reinforcing fiber and it is more economical to produce and widely available fiber. Performance of steel tubes is enhanced by providing strength them with glass fiber reinforced polymer (GFRP) for investigating the effect of GFRP thickness, Specimen length, winding angle. FEA Analysis is performed on the steel specimen and model is simulated in ANSYS 16 software.

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