Experimental and analytical studies on one-way concrete slabs reinforced with GFRP molded gratings
TL;DR: In this article, a closed-form solution for load-deflection behavior of a slab under four-point bending condition is developed by considering a concrete slab as an orthotropic plate and defining stiffness coefficients in principal directions.
Abstract: Corrosion of steel rebars in bridge decks which are faced to harsh conditions, is a common problem in construction industries due to the porosity of concrete. In this research, the behavior of one-way concrete slabs reinforced with Glass fiber reinforced polymer (GFRP) molded grating is investigated both theoretically and experimentally. In the analytical method, a closed-form solution for load-deflection behavior of a slab under four-point bending condition is developed by considering a concrete slab as an orthotropic plate and defining stiffness coefficients in principal directions. The available formulation for concrete reinforced with steel is expanded for concrete reinforced with GFRP molded grating to predict ultimate failure load. In finite element modeling, an exact nonlinear behavior of concrete along with a 3-D failure criterion for cracking and crushing are considered in order to estimate the ultimate failure load and the initial cracking load. Eight concrete slabs reinforced with steel and GFRP grating in various thicknesses are also tested to verify the results. The obtained results from the models and experiments are relatively satisfactory.
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TL;DR: In this paper, the uniaxial behavior of reinforcement-confined coarse aggregate ultra-high-performance concrete (CA-UHPC) under compressive deformation was investigated.
23 citations
TL;DR: In this article, the effects of the bolt-hole clearance in single-bolt connections of PFRP structural members were investigated, and the results showed that most of the specimens failed in two sequential failure modes: bearing failure occurred and the shearout failure followed.
Abstract: Bolt-hole clearance affects the failure mode on the bolted connection system of pultruded fiber-reinforced polymer plastic (PFRP) members. The various geometric parameters, such as the shape and cross-sectional area of the structural members, commonly reported in many references were used to validate the bolt-hole clearance. This study investigates the effects of the bolt-hole clearance in single-bolt connections of PFRP structural members. Single-bolt connection tests were planned using different bolt-hole clearances (e.g., tight-fit and clearances of 0.5 mm to 3.0 mm with 0.5 mm intervals) and uniaxial tension is applied on the test specimens. Most of the specimens failed in two sequential failure modes: bearing failure occurred and the shear-out failure followed. Test results on the bolt-hole clearances are compared with results in the previous research.
7 citations
Cites background from "Experimental and analytical studies..."
...However, the fiber-reinforced plastic (FRP) composites have many advantageous mechanical properties, such as an excellent strength-to-weight ratio and stiffnessto-weight ratio, which make them highly desirable also as a building material for civil engineering applications [2, 3]....
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TL;DR: In this paper, the flexural behavior of splicing concrete-filled glass fiber reinforced polymer (GFRP) tubular composite members connected with steel bars was investigated and the results indicated the confinement effects of GFRP tubes on the concrete core in compression zone began to produce, when the load reached about 50%Pu (Pu-ultimate load).
Abstract: Based on the experiment, this paper focuses on studying flexural behavior of splicing concrete-filled glass fiber reinforced polymer (GFRP) tubular composite members connected with steel bars. The test results indicated the confinement effects of GFRP tubes on the concrete core in compression zone began to produce, when the load reached about 50%Pu (Pu-ultimate load), but the confinement effects in tensile zone was unobvious. In addition, the failure modes of composite members were influenced by the steel ratio of the joint. For splicing unreinforced composite members, the steel ratio more than 1.96% could satisfy the splicing requirements and the steel ratio 2.94% was ideal comparatively. For splicing reinforced specimen, the bearing capacity of specimen with 3.92% steel ratio was higher 21.4% than specimen with 2.94% steel ratio and the latter was higher 21.2% than the contrast non-splicing specimen, which indicated that the steel ratio more than 2.94% could satisfy the splicing requirements and both splicing ways used in the experiment were feasible. So, the optimal steel ratio 2.94% was suggested economically. The experimental results also indicated that the carrying capacity and ductility of splicing concrete-filled GFRP tubular composite members could be improved by setting internal longitudinal rebars.
5 citations
Journal Article•
TL;DR: In this paper, a finite element model for two-way composite slabs was proposed and validated by making a comparison with full-scale tests published in literature for one and twoway composite slab.
Abstract: The paper deals with the modeling and analysis of the ultimate behavior of two-way composite slabs.A software package of COSMOS/M 2.6is used.Non-linear material properties are considered.The proposed finite element model is validated by making a comparison with full-scale tests published in literature for one and two-way composite slabs.Many parameters are studied,such as slab aspect ratio and slab slenderness ratio.The effect of embossments flattening is considered.The effect of cold steel straps which are fixed to the bottom steel deck flange perpendicular to corrugation direction is studied,including the variation of its thickness and distribution.Also the effect of shear studs is considered.The effect of all previous parameters on the ultimate capacity,distribution of reactions into both weak and strong directions,and slab deflection are investigated.The results are also recorded at the serviceability limit state.The analytical results of the two-way composite slabs are compared with the corresponding results of one-way composite slabs.A dramatic increase occurs on slab loads and distribution of reactions into the weak direction.A considerable decrease occurs on slab deflection as a result of using steel straps and studs.
2 citations
TL;DR: In this paper , the performance of reinforced concrete columns against cyclic lateral loads was investigated using externally bonded (EB) and near surface-mounted (NSM) systems and CFRP ropes.
1 citations
References
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01 Jan 2008
TL;DR: The combination of materials to form a new material system with enhanced material properties is a well documented historical fact as discussed by the authors, which is why many artisans from the Mediterranean and Far East used a form of composite technology in molding art works which were fabricated by layering cut paper in various sizes for producing desired shapes and contours.
Abstract: The combination of materials to form a new material system with enhanced material properties is a well documented historical fact. For example, the ancient Jewish workers during their tenure under the Pharaohs used chopped straws in bricks as a means of enhancing their structural integrity. The Japanese Samurai warriors were known to use laminated metals in the forging of their swords to obtain desirable material properties. Even certain artisans from the Mediterranean and Far East used a form of composite technology in molding art works which were fabricated by layering cut paper in various sizes for producing desired shapes and contours.
3,908 citations
Book•
01 Jan 1980
TL;DR: In this paper, the authors present a reference record created on 2005-11-18, modified on 2016-08-08 and used for Laminage Reference Record created on 2006-11/18.
Abstract: Keywords: materiaux : composites ; elasticite ; contraintes ; cisaillement ; traction ; isentropie ; laminage Reference Record created on 2005-11-18, modified on 2016-08-08
1,953 citations
Book•
01 Jan 1982
TL;DR: In this article, some basic properties of concrete and steel are discussed and failure criteria of concrete elasticity and failure of brittle fracture models are discussed. But the authors focus on the failure criteria and not the elasticity of the model.
Abstract: PrefaceNotationPart 1 - Basic Concepts and ExperimentsChapter 1 - IntroductionChapter 2 - Some Basic Properties of Concrete and SteelPart 2 - Concrete Elasticity and Failure CriteriaChapter 3 - Linear-Elastic Brittle-Fracture ModelsChapter 4 - Nonlinear-Elastic Fracture ModelsChapter 5 - Failure Criteria of ConcretePart 3 - Concrete Plasticity: Theory and ApplicationChapter 6 - Elastic Perfectly Plastic Fracture ModelsChapter 7 - Limit Analysis of Perfect PlasticityChapter 8 - Elastic-Hardening Plastic-Fracture ModelsChapter 9 - Numerical Implementation of Elastoplastic Fracture ModelsAuthor IndexSubject Index
1,043 citations
Book•
01 Jan 1981
TL;DR: In this article, the stress analysis of simple members of a plate is performed under combined lateral and in-plane load in the presence of large deflections of the plate. And the authors propose a stress analysis for Cylindrical Shells under general load.
Abstract: 1 Basic Concepts 2 Stress Analysis of Simple Members 3 Elements of Plate Bending Theory 4 Circular Plates 5 Rectangular Plates 6 Plates of Various Geometrical Forms 7 Numerical Methods 8 Anisotropic Plates 9 Plates Under Combined Lateral and In-Plane Loads 10 Large Deflections of Plates 11 Thermal Stresses in Plates 12 Membrane Stresses in Shells 13 Bending Stresses in Shells 14 Applications to Pipes, Tanks, and Pressure Vessels 15 Cylindrical Shells Under General Loads Appendixes
660 citations
01 May 2001
205 citations