13 results about "Frp reinforcement" patented technology

The invention discloses a modular underwater pier reinforcing device and a construction method thereof, and belongs to the technical field of pier reinforcing and repairing. The device comprises a floating platform, a widened and reinforced sleeve and a buffer layer, the floating platform is provided with a platform body through hole, the platform body through hole is matched with the pier in shape, and the platform body through hole is used for containing the pier; the widened reinforcing sleeve is arranged on the floating table and provided with a sleeve channel, and the sleeve channel is used for containing the pier; when the bridge pier is located in the sleeve channel, the portion between the bridge pier and the widened reinforcing sleeve is filled with a buffer layer, and the buffer layer provides buffer for the bridge pier. The waterproof floating platform is matched with the arrangement of the widened reinforcing sleeve, cofferdam-free rapid construction can be conducted underwater, the construction period is shortened, and the repairing efficiency of pier reinforcement is improved; and the widened reinforcing sleeve is matched with the buffer layer, the advantages of a section increasing reinforcing method, an FRP reinforcing method and a steel plate wrapping reinforcing method are fused, and the repairing effect of pier reinforcing is improved.

This invention provides a method for reinforcing a corroded reinforced concrete column with FRP (fiberglass reinforced plastic) reinforcement-mesh composite structure. The structure includes: a concrete column having a portion to be reinforced and exposed corroded reinforcing steel bars after the concrete cover of the portion to be reinforced has been removed; an FRP reinforcement-mesh composite layer, formed by bonding FRP bars and FRP mesh, wrapped around the outer side of the core area of ​​the concrete column after the concrete cover has been removed, providing longitudinal reinforcement and lateral restraint to strengthen the internal concrete of the portion to be reinforced; several fasteners for securing the FRP reinforcement-mesh composite layer; and ultra-high performance concrete filling both the inner and outer sides of the FRP reinforcement-mesh composite layer, bonding the composite layer to the reinforced concrete column to repair the removed concrete cover and restore the column's cross-section to its original dimensions. This reinforcement structure enhances the strength and deformation capacity of the internal concrete, increases the axial compression, bending, and shear resistance of the corroded reinforced concrete column, and improves the column's durability.

The application relates to a residual compressive strength prediction method of FRP reinforced nano-modified UHPC after high-temperature exposure. The residual compressive strength prediction method of FRP reinforced nano-modified UHPC after high-temperature exposure provided by the application comprises the following steps: UHPC characteristic vectors are obtained by respectively preprocessing UHPC proportioning parameters and nano material parameters, and the UHPC characteristic vectors are respectively subjected to feature extraction together with FRP reinforcement parameters to respectively obtain UHPC features and FRP reinforcement features, and then the features are sequentially subjected to feature fusion, and deep feature extraction is performed together with a high-temperature exposure parameter to obtain high-temperature exposure UHPC features, which are respectively connected with the UHPC features and the FRP reinforcement features to respectively generate residual compressive features of high-temperature UHPC and high-temperature FRP; and the residual compressive features of the high-temperature UHPC and the high-temperature FRP are subjected to feature fusion and prediction to obtain a residual strength value. The residual compressive strength prediction method of FRP reinforced nano-modified UHPC provided by the application improves the residual strength prediction accuracy of FRP reinforced nano-modified UHPC after high-temperature exposure.

A recoverable function FRP hybrid reinforcement hybrid shear wall structure with replaceable wall foot components and replaceable coupling beam components, comprising a wall limb, a replaceable coupling beam, a replaceable wall foot, a floor, and a lower constraint beam. The replaceable coupling beam of the shear wall comprises two non-replaceable concrete coupling beam segments at the ends and a replaceable energy-dissipation H-shaped steel beam segment in the middle. A gap is provided between the upper floor of the coupling beam and the coupling beam, and no connection is processed. The replaceable wall foot is provided with a new type of friction energy dissipation device, which resists tension through friction and resists compression through steel pipe concrete and friction. An internal steel truss is additionally arranged at the bottom of the wall limb of the shear wall. Longitudinal stress reinforcement of the wall body is in the form of FRP hybrid reinforcement with a strength gradient. The damage and energy dissipation of this new type of shear wall structure system are mainly concentrated in the replaceable coupling beam and the replaceable wall foot. The unbonding treatment between the floor and the coupling beam reduces the damage of the floor. The internal steel truss improves the shear capacity of the replaceable area of the wall body. The FRP reinforcement is always in the elastic stage, which ensures the self-resetting performance of the wall body. The FRP hybrid shear wall with replaceable wall foot components and replaceable coupling beam components has the characteristics of excellent bearing capacity, energy dissipation and self-resetting performance.

The utility model relates to FRP (fiber reinforce plastic) rib material forming equipment which comprises a forming equipment body and FRP rib materials, the front end of the left side of the forming equipment body is fixedly connected with a fixed frame, the lower end face in the fixed frame is fixedly connected with a plurality of rotating frames II, the interiors of the rotating frames II are rotatably connected with curved wheels II, and a moving plate is arranged above the curved wheels II; a plurality of first rotating frames are fixedly connected to the lower end face of the movable plate, first curved wheels are rotationally connected into the first rotating frames, openings are formed in the two side faces of the fixed frame, and limiting sliding blocks slidably connected with the interiors of limiting sliding grooves formed in the inner surface of the fixed frame are fixedly connected to the left side face and the right side face of the movable plate. And the movable plate is connected with the fixed frame through a lifting mechanism. According to the FRP rib material forming equipment disclosed by the utility model, the use distance between the curved wheel I and the curved wheel II can be adjusted according to FRP rib materials with different diameters, so that the use effect is improved, and the FRP rib material forming equipment is relatively practical.

The application belongs to the technical field of fireproof materials, and particularly relates to a non-expanding fireproof coating for fiber reinforced composite materials and a preparation method and application thereof. In the preparation raw materials of the non-expanding fireproof coating, the binder comprises metakaolin, fly ash, CA80 high-aluminum cement and an activator, or comprises metakaolin, fly ash, CA80 high-aluminum cement, an activator and an organic binder, the organic binder comprises redispersible emulsion powder and / or polyvinyl alcohol powder, the heat-insulating filler comprises expanded vermiculite, hydrophobically modified expanded perlite, sepiolite and hollow glass microspheres, the flame retardant comprises aluminum hydroxide and magnesium hydroxide, the fiber comprises glass fiber, and the additives comprise a foaming agent, a thickening agent, a foam stabilizer and an acrylic emulsion. The formed coating has the advantages of low carbon, low cost, excellent heat-insulating performance and high-temperature strength, can be applied as a fireproof coating for fiber reinforced composite materials (FRP), and can effectively protect the FRP reinforcement system.

This utility model belongs to the technical field of testing equipment, and particularly relates to a testing device for FRP (fiberglass reinforced plastic) anchored seawater sand-polymer concrete. It includes a loading reaction frame and a reaction frame support. The loading reaction frame has a testing cavity, within which is a placement position for placing the FRP anchor. The placement position has a through hole penetrating the testing cavity. The reaction frame support is located between the placement position and the FRP anchor, abutting against the surface of the concrete specimen containing the FRP anchor. The reaction frame support also has a matching hole corresponding to the through hole, which is adapted to the size of the FRP anchor and allows it to pass through. This addition of a matching reaction frame support prevents the formation of a cone-shaped structure on the surface of the concrete specimen during the pull-out test.

The application relates to a concrete reinforcement cage, discloses an FRP reinforcement cage, a production device and a manufacturing method, the FRP reinforcement cage comprises FRP reinforcements which are cross-connected with each other, the FRP reinforcement comprises a plurality of reinforced fiber layers which are covered by resin, the reinforced fiber layers with different directions at the cross-connection points of the FRP reinforcement are staggered layer by layer, and the FRP reinforcement is integrally formed by being covered by the resin, so that the FRP reinforcement cage has the advantages of high structural stability. The production device of the FRP reinforcement cage comprises a composite fiber forming device, a fiber bundle conveying device, a movable workbench, a resin impregnation device, a resin-impregnated fiber output device and a reinforcement cage forming roller, the resin-impregnated fiber output device comprises an output guide frame and a grouping guide roller, different numbers of composite reinforced fiber bundles can be grouped and combined, FRP reinforcement layer bundles which are distributed at intervals are formed, and the FRP reinforcement cage has the advantages of high manufacturing efficiency and convenient parameter adjustment. The application further discloses a manufacturing method of the FRP reinforcement cage.

The utility model provides an FRP reinforced core diameter measuring device. The FRP reinforced core diameter measuring device comprises a supporting table, the top of the supporting table is fixedly connected with a fixing frame, the interior of the fixing frame is fixedly connected with a limiting sleeve in a sleeved mode, and the interior of the limiting sleeve is movably connected with a lifting column in a sleeved mode. The FRP reinforced core diameter measuring device provided by the utility model is provided with the touch control pen, and when the diameter of the reinforced core is measured, the touch control screen and the controller are started, so that the transmission reinforced core can drive the lifting wheel to rotate, the lifting wheel can be driven to move up and down when the diameter of the reinforced core fluctuates, and the diameter of the reinforced core is measured. When the diameter of the reinforcing core is measured, the touch pen is driven to move up and down, at the moment, the controller can detect the fluctuation height of the touch pen through the touch screen, then the effect of continuously measuring the diameter of the reinforcing core in a transmission mode is achieved, the problem that the measuring precision is low when the diameter is measured at a single position is solved, and therefore the measuring precision of the diameter of the reinforcing core is improved.

The utility model discloses a round-rod-shaped tooth-shaped clamping plate anchorage device suitable for prestress FRP cloth materials, which belongs to the technical field of civil engineering and composite materials, and is characterized by comprising an FRP cloth material structure, an upper semicircular rod tooth-shaped clamping plate, a bolt and a lower semicircular rod tooth-shaped clamping plate, the FRP cloth material structure is arranged between the upper semicircular rod tooth-shaped clamping plate and the lower semicircular rod tooth-shaped clamping plate, and the problem that the material characteristic limitation exists in the existing FRP reinforcing beam technology, that is, when FRP works together with reinforcing steel bars, it is difficult to give full play to the strength to restrain structural deformation and crack development is solved; fRP cloth material prestress reinforcement lacks effective tensioning construction and anchoring measures, and application in reinforcement engineering is limited; the problems that according to an existing anchoring system, an excessive stress peak value is easily generated at an anchorage device outlet due to the characteristics of FRP materials, so that the materials are damaged in advance, and the anchorage device is too long, too large in size, complex in structure and high in manufacturing cost due to the frequently-adopted measures such as increasing the anchoring length are solved.

The application discloses a constraint solidified chloro-saline soil reinforced column for resource utilization of chloro-saline soil and a construction method thereof, and belongs to the field of traffic engineering. Specifically, for the chloro-saline soil with a salt content of 3-48%, the chloro-saline soil is used as a column material, industrial solid waste is used as a solidifying agent material, a corrosion-resistant pipe with good mechanical properties is used as a constraint pipe, and a corrosion-resistant reinforcement with good mechanical properties is used as a vertical reinforcement and is uniformly arranged in the constraint pipe and closely attached to the inner wall of the constraint pipe. The reinforcement includes, but is not limited to, steel reinforcement, bamboo reinforcement, FRP reinforcement and combinations of different types of reinforcement, and the reinforcement ratio ranges from 0.6 to 4.2%. According to the buried depth, height and design value of the bearing capacity of the reinforced column, the material composition and size of the constraint pipe, the type and number of reinforcement, the material composition of the cementing component and the expanding component in the solidifying agent, the solidifying agent content and the water-cement ratio are determined. The solidifying agent is uniformly mixed with the chloro-saline soil at a fixed water-cement ratio, filled into the constraint pipe and extruded and compacted to form the constraint solidified chloro-saline soil reinforced column.

Method for connecting rebar intersections of a foldable FRP rebar cage to allow folding and unfolding of the cage to facilitate transportation one or more rebar cages.

The invention relates to a method for predicting residual compressive strength of FRP (Fiber Reinforce Plastic) reinforced nano-modified UHPC (Ultra High Performance Concrete) after high-temperature exposure. The method for predicting the residual compressive strength of the FRP-reinforced nano-modified UHPC after high-temperature exposure comprises the steps that UHPC matching parameters and nano-material parameters are preprocessed respectively, UHPC feature vectors are obtained, feature extraction is conducted on the UHPC feature vectors and FRP reinforcing parameters respectively, UHPC features and FRP reinforcing features are obtained respectively, feature fusion is conducted in sequence, and the residual compressive strength of the FRP-reinforced nano-modified UHPC after high-temperature exposure is obtained. Performing deep feature extraction in combination with the high-temperature exposure parameters to obtain high-temperature exposure UHPC features, and performing residual connection on the high-temperature exposure UHPC features with the UHPC features and the FRP reinforcement features to generate high-temperature UHPC and high-temperature FRP residual compressive features; and carrying out feature fusion and prediction on the residual compression resistance features of the high-temperature UHPC and the high-temperature FRP to obtain a residual strength value. According to the method for predicting the residual compressive strength of the FRP-reinforced nano-modified UHPC, the prediction accuracy of the residual compressive strength of the FRP-reinforced nano-modified UHPC after high-temperature exposure is improved.