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Disease and solution of concrete bridge
Common diseases of Concrete Bridges：spalling, exposed tendons, honeycomb, concrete corrosion, mesh cracks.
2020-01-11 12:07
Repair the cracks in the pier
Harmful cracks will not affect the bridge structure, affect the service life of bridges, accumulate over time, will lead to bridge collapse.
2020-01-11 12:08
Repair measures for cracks in wall and concrete beams
For cracks in concrete beams with width of 0.2-mm, besides epoxy resin pressure grouting according to the two methods, CFRP is bonded to seal the surface. Reinforced concrete beams are reinforced by CFRP sheets at the bottom of the mid span.
2020-01-11 12:13
Concrete beams strengthened with carbon fiber composite sheets
In order to study the effect of the external carbon fiber composite sheets on the shear strength of the specimens, the 12 specimens are rectangular beams with no abdominal reinforcement, and the bottom of the beam is matched with 2 18 longitudinal bars, and the size of the specimen is 2600 * 150 x 300.
2020-01-11 12:13
Affecting beams strengthened with bonded steel plate
Factors affecting the bearing capacity of beams strengthened with bonded steel plate: length of steel plate anchorage; historical loading; reinforcement ratio of steel bar; anchorage measures at the end of steel plate
2020-01-11 12:26
Strengthening of steel corrosion to concrete structure
The steel corrosion not only reduces the cross section of the steel, but also reduces the yield strength and the ultimate strength of the steel, which is one of the reasons for the reduction of the bearing capacity of the components.
2020-01-11 12:32
Reinforcement of brick columns by steel jacketing
It is possible to increase the bearing capacity of brick columns and greatly improve the lateral resistance of brick columns under the condition that the size of brick columns does not increase much.
2020-01-11 12:39
Strengthening Reinforced Concrete Beams with CFRP and GFRP
FRP can significantly improve the shear strength of beams, but the height of FRP is different, and the bearing capacity of reinforced concrete is also different. Therefore, this adverse effect should be considered in the design.
2020-01-11 12:41
Principles for seismic strengthening by CFRP
Because the building itself is seriously damaged, we must ensure that the structure of the building is not damaged two times during construction. So at present, CFRP reinforcement is a kind of reinforcement method that minimizes the loss of buildings. It is recommended to be widely promoted in the earthquake stricken area.
2020-01-11 12:45
Ten major seismic strengthening materials
From the point of view of building materials, seismic building materials must have the characteristics of light, high strength and high toughness, such as wood, light steel, steel, reinforced concrete and composite material.
2020-01-11 12:50
Carbon fiber reinforced polymer(CFRP) for bridge strengthening
Fiber reinforced polymer(CFRP) fabric reinforced bridge members have the advantages of light weight, high strength, high elastic modulus, corrosion resistance, good durability and impact resistance.
2020-01-11 12:51
Construction operation of CFRP U shaped hoop
The CFRP U - shaped hoop is a U - shaped stirrup made of carbon fiber fabric. In order to fix the carbon fabric of the bottom of the beam and transfer the reliable force, when the CFRP is strengthened, the carbon fiber cloth U shaped hoop is often pasted, and the strip is not allowed only on the side of the beam.
2020-01-11 12:53
Prestressed FRP strip supporting bridge
In the field of bridge reinforcement, the new method of strengthening the prestressed FRP laminate is a very effective method, which can achieve twice the result with half the effort.
2020-01-11 12:54
Prestressed FRP laminate is widely used in bridge strengtening
For the problems brought about by the strengthening of carbon fiber reinforced material, the reinforcement method of Prestressed CFRP laminate can be solved by applying a pre stress to the carbon fiber plate, and then anchoring it on the reinforced component.
2020-01-11 12:57
Strengthening columns with carbon fiber fabric
carbon fiber composite strengthening system comprises of unidirectional carbon fiber fabrics, primer, leveling,carbon fiber impregnating adhesive. These unique combinations provide a wide range of strengthening and retrofitting solutions to meet the many demands of different projects and applications.
2020-01-11 12:59
Application of direct reinforcement method for concrete
The direct reinforcement method:Enlargement section method; Displacement concrete method; Prestressed strengthening method; Externally bonded steel plate; Pasting steel plate method; Externally bonded FRP wrap
2020-01-11 13:01
Comparative analysis for bonded steel and FRP wrap
Nowadays, bonding steel plate reinforcement and FRP wrap reinforcement in concrete are often used in the reconstruction and reinforcement works of building structures, and the positions of bonding reinforcement are almost the same.
2020-01-11 13:03
Mechanism analysis of CFRP in concrete structure reinforcement
Carbon fiber reinforced polymer(CFRP) technology is widely used. It is suitable for the reinforcement and repair of various structural types and various structural parts, such as beams, plates, columns, roof frames, bridge piers, bridges, cylinders and shells, which require that the strength grade of the concrete at the base level is not less than C15.
2020-01-11 13:05
Beam, column, slab, wall strengthening
Beam, column, slab, wall strengthening by bonded carbon fiber fabric, increase the crack resistance or shear capacity of the structure, improve the strength, rigidity, crack resistance and elongation of the structure.
2020-01-11 13:06