An experimental study of the failure modes of reinforced concrete beams strengthened with prestressed carbon composite plates

Garden, H N; Hollaway, L.

doi:10.1016/s1359-8368(97)00043-7

Cited by 138 publications

(63 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The failure modes of the beams are not described in further detail here since this paper is concerned specifically with the strengthening and stiffening behaviour of plating with prestressed and non-prestressed plates; the failure modes have been considered in [10]. loMs of all beams prestress applied.…”

Section: Resultsmentioning

confidence: 99%

“…The procedures for characterising the concrete, adhesive and composite plates have been described in [10]. Concrete made from ordinary Portland cement was used; its 28-day compressive strength was 54 MPa and 47 MPa for the 1.0 m and 4.5 m beams, respectively, both with a modulus of 35 GPa.…”

Section: Materials Usedmentioning

confidence: 99%

“…For the concrete, this was achieved by gritblasting the beam soffits, as described in [10]. The CFRP surfaces were roughened for bonding by carefully removing a pre-attached peel ply.…”

Section: Surface Preparation and Bonding Proceduresmentioning

confidence: 99%

“…This paper is concerned specifically with the strengthening achieved and the deformation behaviour of reinforced concrete beams prestressed in this way. The paper is the second of two, the first considering the failure modes of the beams (Garden and HoUaway [10]). …”

Section: Specimen Identity Notation I Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

1998

View full text Add to dashboard Cite

A B S T R A C T R I~ S U M I~Externally bonded steel plates have been used worldwide for over twenty years to strengthen concrete members, but the disadvantages include the transportation and installation of heavy plates and steel corrosion. Polymeric composites avoid these disadvantages and provide an equally effective method of strengthening. The advantages of composites are exploited further by prestressing them before bonding to the concrete. This paper is concerned with the response of such prestressed members to applied load.After strengthening with externally bonded carbon fibre reinforced polymer (CFRP) plates, a number of beams of 1.0 m and 4.5 m lengths were tested in four point bending. The plates were bonded without prestress and with prestress levels ranging from 25% to 50% of the plate strength. The ultimate capacities of the nonprestressed beams were significantly higher than those of the unplated members and plate prestress brought about yet further strengthening. Prestressed plates are utilised more efficiently than non-prestressed plates, since a given plate strain is associated with a lower structural deformation in a prestressed member. The internal steel rebars yielded at a higher proportion of the ultimate capacity in the prestressed beams. Prestressing lowers the position of the neutral axis so more of the concrete section is loaded in compression, making more efficient use of the concrete.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Materials Usedmentioning

confidence: 99%

“…For the concrete, this was achieved by gritblasting the beam soffits, as described in [10]. The CFRP surfaces were roughened for bonding by carefully removing a pre-attached peel ply.…”

Section: Surface Preparation and Bonding Proceduresmentioning

confidence: 99%

Section: Specimen Identity Notation I Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

1998

View full text Add to dashboard Cite

show abstract

“…The S&P system consisted of steel plates, which create anchorages for composite strips fixed between steel and concrete surface. In USA the main works on development of CFRP prestressing systems were carried out at University of Missouri-Rolla [4], [5]. All of the systems mentioned above have the steel anchorage blocks.…”

Section: Introductionmentioning

confidence: 99%

Strengthening Bridges with Prestressed CFRP Strips

Siwowski

Żółtowski

2012

Selected Scientific Papers - Journal of Civil Engineering

View full text Add to dashboard Cite

Limitation of bridge's carrying bearing capacity due to aging and deterioration is a common problem faced by road administration and drivers. Rehabilitation of bridges including strengthening may be applied in order to maintain or upgrade existing bridge parameters. The case studies of strengthening of two small bridges with high modulus prestressed CFRP strips have been presented in the paper. The first one -reinforced concrete slab bridge -and the other -composite steel-concrete girder bridge -have been successfully upgraded with quite new technology. In both cases the additional CFRP reinforcement let increasing of bridge carrying capacity from 15 till 40 metric tons. The CFRP strip prestressing system named Neoxe Prestressing System (NPS), developed by multi-disciplinary team and tested at full scale in Rzeszow University of Technology, has been also described in the paper.

show abstract

Viscoelastic behavior of hybrid building materials

Papanicolaou

Lagas

Zaoutsos

2014

J of Applied Polymer Sci

View full text Add to dashboard Cite

The objective of this experimental work is the investigation of the viscoelastic behavior of a hybrid matrix, fiberreinforced building material. Hybrid matrix consisted of epoxy resin mixed with fine marble sand, whereas short steel fibers were used as reinforcement. The experimental procedure involved, first, the manufacturing of specimens using different hybrid matrix types and different reinforcement by weight ratios. Subsequently, bending relaxation experiments at room temperature were executed, under three-point bending test experimental configuration, at different strain levels and the variation of stress of the hybrid matrix material with time was monitored. The data obtained were used to (i) investigate the effect of reinforcement mass fraction contained in the composite on the viscoelastic behavior and (ii) to apply existed and newly developed viscoelastic models for the description of the observed viscoelastic behavior. More precisely, the four-parameter (Burgers) viscoelastic model and the modified Residual Property Model were calibrated and used to simulate the relaxation behavior of the materials manufactured and tested. Experimental results exhibited a clear influence of both reinforcement ratio and initial displacement on the viscoelastic behavior of the materials manufactured and tested, whereas the models proposed and used can adequately reproduce the variation of relaxation stress with time.

show abstract

An experimental study of the failure modes of reinforced concrete beams strengthened with prestressed carbon composite plates

Cited by 138 publications

References 6 publications

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates

Strengthening Bridges with Prestressed CFRP Strips

Viscoelastic behavior of hybrid building materials

Contact Info

Product

Resources

About