CN213774608U - Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus - Google Patents

Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus Download PDF

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Publication number
CN213774608U
CN213774608U CN202022817251.2U CN202022817251U CN213774608U CN 213774608 U CN213774608 U CN 213774608U CN 202022817251 U CN202022817251 U CN 202022817251U CN 213774608 U CN213774608 U CN 213774608U
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carbon fiber
clamping block
steel plate
wedge
plate
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CN202022817251.2U
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庞海龙
刘涛
左世娇
邓婉莹
张龙
马健超
陈林
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Abstract

The utility model discloses an unbonded prestressed carbon fiber plate reinforcing device with middle jacking and tensioning prestressing force, which mainly comprises an end part anchoring device and a middle jacking and tensioning device; the end part anchoring device comprises an upper clamping block and a lower clamping block, wherein a wedge-shaped groove and a wedge-shaped bulge are respectively arranged between opposite surfaces of the upper clamping block and the lower clamping block, a plurality of anchor bolts are uniformly arranged on the upper clamping block, and high-strength bolts are uniformly arranged on the lower clamping block; the two ends of the carbon fiber plate are clamped and fixed in the matching surfaces of the wedge-shaped groove and the wedge-shaped protrusion; the middle jacking tensioning device comprises a fixed steel plate, a plurality of anchor bolts are uniformly arranged on the fixed steel plate, four long threaded rods are connected into the fixed steel plate, the lower ends of the four long threaded rods sequentially penetrate through the movable steel plate and the lifting steel plate, and nuts are sleeved on the upper surface and the lower surface of the movable steel plate and the four long threaded rods below the lifting steel plate in a clinging manner. The utility model discloses can realize the unbonded reinforcement of carbon fiber plate, it is low to the surface treatment requirement of concrete beam slab bottom, and is less to the damage of structure, and the anchor is reliable.

Description

Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus
Technical Field
The utility model belongs to concrete structure consolidates the field, concretely relates to middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus.
Background
As a novel high-performance composite material, a carbon fiber plate has been widely used in the field of civil engineering structure reinforcement, particularly in the field of concrete structure reinforcement. The carbon fiber plate has excellent performances of high tensile strength, corrosion resistance, elastic recovery capacity and the like, is applied to the reinforcement of concrete beams and plates, can obviously improve the bending resistance bearing capacity of the beams and the plates, can obviously reduce the deformation and the crack width of the beams and the plates by applying prestress, can also exert the advantage of high strength of the carbon fiber plate to a great extent, and improves the utilization rate of materials.
Carbon fiber plates have good tensile properties but poor transverse shear resistance, which causes problems in anchoring the carbon fiber plates. Meanwhile, when the prestressed carbon fiber plate is used for reinforcement, the following problems are often encountered: (1) the prestress tension is insufficient, and special anchors and clamps are needed; (2) the anchorage device is too heavy, difficult to install and relatively high in material cost; (3) the operation is complex and the time is long; (4) the surface of the concrete is treated by gluing, and the structural damage is large. Especially, the viscose treatment can easily cause the carbon fiber plate to be peeled off and quit the work early, and the high performance advantage of the carbon fiber plate is influenced.
Therefore, there is a need for an unbonded prestressed reinforcement device that can be lightweight and convenient for construction, and can better utilize the carbon fiber plate to improve the bending resistance and bearing capacity.
Disclosure of Invention
An object of the utility model is to the above-mentioned defect that exists among the prior art, provide a middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus of simple structure, simple to operate, easily construction.
The above object of the present invention is achieved by the following technical solutions: the unbonded prestressed carbon fiber plate reinforcing device with the jacking and tensioning prestress in the middle comprises a carbon fiber plate; the carbon fiber plate fixing device comprises a carbon fiber plate, a plurality of middle jacking tensioning devices and a plurality of middle jacking tensioning devices, wherein the carbon fiber plate is fixed at two ends of the bottom of the concrete beam or plate through anchor bolts; the end part anchoring device comprises an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are two independent block-shaped components, wedge-shaped grooves and wedge-shaped bulges which are matched with each other are respectively arranged between opposite surfaces of the two independent block-shaped components, and a plurality of anchor bolts are uniformly arranged on two side wings at the upper part of the upper clamping block and are connected with two ends of the bottom part of the concrete beam or plate through the anchor bolts; high-strength bolts are uniformly arranged on two side wings of the wedge-shaped bulge of the lower clamping block and are connected with the two side bulges of the wedge-shaped groove of the upper clamping block through the high-strength bolts; the two ends of the carbon fiber plate are clamped and fixed in the matching surfaces of the wedge-shaped groove and the wedge-shaped protrusion; the middle jacking and tensioning device comprises a fixed steel plate, a plurality of anchor bolts are uniformly arranged on two sides of the fixed steel plate and are connected with the bottom of the concrete beam or plate through the anchor bolts; four long threaded rods are connected in the fixed steel plate, and the four long threaded rods downwards form a quadrangular corner post; the lower ends of the four long threaded rods sequentially penetrate through the movable steel plate and the lifting steel plate, and nuts are sleeved on the four long threaded rods which are tightly attached to the upper surface and the lower surface of the movable steel plate and the lower surface of the lifting steel plate; the lower surface of the movable steel plate is propped against the carbon fiber plate for tensioning the prestress of the carbon fiber plate.
Further, the steel surfaces of the wedge-shaped grooves of the upper clamping blocks and the wedge-shaped bulges of the lower clamping blocks of the end part anchoring device, which are contacted with the carbon fiber plate, are subjected to rough treatment, and structural adhesive is coated; the edge of the port of the wedge-shaped groove and the wedge-shaped bulge is arc-shaped.
Furthermore, the middle part of the lower surface of the movable steel plate of the middle jacking tensioning device is an arc-shaped bulge.
The utility model discloses simple structure, easy to assemble, each part all has its characteristics. The clamping mechanism of the grooves and the protrusions is similar to that of occlusion, and the lower clamping block is tightly connected with the upper clamping block through a high-strength bolt; the lower end of the middle jacking tensioning device moving steel plate is provided with the arc-shaped bulge, so that the carbon fiber plate rotates around the moving steel plate when the middle jacking tensioning device is used for jacking, and the transverse stress of the carbon fiber plate can be reduced.
The utility model discloses compare in existing carbon fiber plate prestressing force reinforcing apparatus, can realize the unbonded reinforcement of carbon fiber plate, require lowly to the surface treatment of concrete beam slab bottom, it is less to the damage of structure, the atress is clear and definite, and the anchor is reliable, simple to operate, and simple technique, spare part are less, and easily operation has the obstacle to need to stride across the reinforced condition bottom the beam slab in being particularly useful for actual engineering.
Drawings
Fig. 1 is the overall structure schematic diagram of the carbon fiber plate reinforcing device of the present invention.
Fig. 2 is a perspective view of the end anchor of fig. 1.
Fig. 3 is a front view of the upper and lower blocks of fig. 2 when connected.
Fig. 4 is a right side view of fig. 3.
Fig. 5 is a bottom view of fig. 3.
Fig. 6 is a schematic perspective view of the middle jacking-tensioning device in fig. 1.
Fig. 7 is a front view of fig. 6.
Fig. 8 is a side view of fig. 7.
Fig. 9 is a bottom view of fig. 7.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1, the unbonded prestressed carbon fiber plate reinforcing device with jacking and tensioning prestress in the middle of the embodiment comprises a carbon fiber plate 12; the device also comprises an end anchoring device for fixing two ends of the carbon fiber plate 12 to two ends of the bottom of the concrete beam or plate 15 through anchor bolts 1, and two middle jacking and tensioning devices which are uniformly arranged between two ends of the bottom of the concrete beam or plate 15 through anchor bolts 5; the number of tensioning devices can be adjusted as desired. Referring to fig. 2 to 5, the end anchoring device includes an upper clamping block 2 and a lower clamping block 3, the upper clamping block 2 and the lower clamping block 3 are two independent block-shaped members, wedge-shaped grooves and wedge-shaped protrusions which are mutually matched are respectively arranged between opposite surfaces of the two independent block-shaped members, 5 anchor bolts 1 are uniformly arranged on two side wings on the upper part of the upper clamping block 2, and the two anchor bolts 1 are connected with two ends of the bottom of a concrete beam or slab 15. High-strength bolts 4 are uniformly arranged on two side wings of the wedge-shaped protrusions of the lower clamping block 3, the wedge-shaped protrusions of the lower clamping block 3 are inserted into the wedge-shaped grooves of the upper clamping block 2, and the lower clamping block 3 is tightly connected with the upper clamping block 2 through the high-strength bolts 4. The two ends of the carbon fiber plate 12 are clamped and fixed in the matching surfaces of the wedge-shaped groove and the wedge-shaped protrusion. Referring to fig. 6 to 9, the middle jacking and tensioning device comprises a fixed steel plate 6, two sides of the fixed steel plate 6 are uniformly provided with two holes, and four anchor bolts 5 fix the fixed steel plate 6 at the bottom of a concrete beam or slab 15 through the four holes by using nuts 7; four holes are uniformly formed in the middle of the fixed steel plate 6, four long threaded rods 8 are screwed on the fixed steel plate 6 through the four holes respectively, and the four long threaded rods 8 downwards form a quadrangular corner post; the lower ends of the four long threaded rods 8 sequentially penetrate through the movable steel plate 10 and the lifting steel plate 13, and nuts 9, 11 and 14 are sleeved on the four long threaded rods 8 tightly attached to the upper and lower surfaces of the movable steel plate 10 and the lower surface of the lifting steel plate 13; the underside of the moving steel plate 10 bears against the carbon fibre plate 12 to tension it. The wedge-shaped groove of the upper clamping block 2 and the wedge-shaped bulge of the lower clamping block 3 of the end part anchoring device are subjected to rough treatment on the steel surface contacted with the carbon fiber plate 12, and structural glue is coated on the steel surface to improve the friction force between the steel and the carbon fiber plate; the port edges of the wedge-shaped grooves and the wedge-shaped protrusions are designed to be arc-shaped, so that the carbon fiber plate 12 can rotate at the port in a small range, and the concentrated stress of the port edges on the carbon fiber plate 12 is reduced. The middle part below the mobile steel plate 10 of the middle jacking tensioning device is designed to be arc-shaped, so that the carbon fiber plate 12 rotates around the mobile steel plate 10 when the middle jacking is facilitated, and the transverse stress of the carbon fiber plate 12 can be reduced.
The working process of the device is as follows:
the anchor bolt 1 penetrates through the upper clamping block 2 with the wedge-shaped groove to fix the anchor bolt at the bottom of the concrete beam or plate 15, one end of the carbon fiber plate 12 is arranged in the wedge-shaped groove of the upper clamping block 2, the wedge-shaped protrusion of the lower clamping block 3 is inserted into the wedge-shaped groove, and the lower clamping block 3 is tightly connected with the upper clamping block 2 through the high-strength bolt 4.
A fixed steel plate 6 in the middle jacking and tensioning device is fixed at the bottom of a concrete beam or plate 15 through an anchor bolt 5 and a nut 7, and then a long threaded rod 8 is screwed into a reserved hole of the fixed steel plate 6; each long threaded rod 8 is screwed into the first group of nuts 9 and screwed to the same horizontal position, then the movable steel plate 10 penetrates through the long threaded rods 8 and is screwed into the second group of nuts 11 respectively, and the movable steel plate 10 is limited and fixed according to the height of the jack and the jacking distance required by the tension prestress; the carbon fiber plate 12 with one end anchored penetrates through the middle jacking device and is tightly attached to the arc-shaped bulge below the movable steel plate 10, after the carbon fiber plate 12 penetrates through the middle jacking tensioning device and before the other end of the carbon fiber plate is anchored, the lifting steel plate 13 is arranged on the four long threaded rods 8 through the reserved holes of the lifting steel plate, the lower part of the carbon fiber plate 12 is arranged, the suspended carbon fiber plate 12 is temporarily supported, and the screw-in third group of nuts 14 are fixed in a limiting mode. Further, an anchoring device at the other end of the carbon fiber plate 12 is installed; after the two ends of the carbon fiber plate 12 are anchored and before the middle part is jacked to stretch the prestress, the third group of nuts 14, the lifting steel plate 13 and the second group of nuts 11 are successively dismounted; the jack is arranged between the fixed steel plate 6 and the movable steel plate 10, the downward jacking of the jack drives the movable steel plate 10 and the carbon fiber plate 12 to move downwards to deform so as to stretch prestress, further, after the movable steel plate 10 moves downwards to a preset design height, namely a preset stretching stress is reached, the first group of nuts 9 are fixed firstly, then the second group of nuts 11 are screwed in, the movable steel plate 10 is limited and fixed, and finally the jack is unloaded and removed, so that the stretching is completed. The wedge-shaped groove and the wedge-shaped protrusion are clamped by a similar occlusion mechanism, the lower clamping block 3 and the upper clamping block 2 are tightly connected through the high-strength bolt 4, and large pre-tightening force is generated on the carbon fiber plate 12.
It is only to go up the utility model discloses a detailed implementation, relevant technical staff can be in not deviating from the utility model discloses the within range of principle and technique, right the utility model discloses the operation such as modification, replacement that go on still falls into the utility model discloses an in the protection scope.

Claims (3)

1. A middle part jacking tension prestressing force-free prestressing force carbon fiber plate reinforcing device comprises a carbon fiber plate; the method is characterized in that: the carbon fiber plate fixing device comprises a carbon fiber plate, a plurality of middle jacking tensioning devices and a plurality of middle jacking tensioning devices, wherein the carbon fiber plate is fixed at two ends of the bottom of the concrete beam or plate through anchor bolts; the end part anchoring device comprises an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are two independent block-shaped components, wedge-shaped grooves and wedge-shaped bulges which are matched with each other are respectively arranged between opposite surfaces of the two independent block-shaped components, and a plurality of anchor bolts are uniformly arranged on two side wings at the upper part of the upper clamping block and are connected with two ends of the bottom part of the concrete beam or plate through the anchor bolts; high-strength bolts are uniformly arranged on two side wings of the wedge-shaped bulge of the lower clamping block and are connected with the two side bulges of the wedge-shaped groove of the upper clamping block through the high-strength bolts; the two ends of the carbon fiber plate are clamped and fixed in the matching surfaces of the wedge-shaped groove and the wedge-shaped protrusion; the middle jacking and tensioning device comprises a fixed steel plate, a plurality of anchor bolts are uniformly arranged on two sides of the fixed steel plate and are connected with the bottom of the concrete beam or plate through the anchor bolts; four long threaded rods are connected in the fixed steel plate, and the four long threaded rods downwards form a quadrangular corner post; the lower ends of the four long threaded rods sequentially penetrate through the movable steel plate and the lifting steel plate, and nuts are sleeved on the four long threaded rods which are tightly attached to the upper surface and the lower surface of the movable steel plate and the lower surface of the lifting steel plate; the lower surface of the movable steel plate is propped against the carbon fiber plate for tensioning the prestress of the carbon fiber plate.
2. The middle jacking tension prestressed unbonded prestressed carbon fiber plate reinforcing device according to claim 1, characterized in that: the steel surfaces of the upper clamping block wedge-shaped groove and the lower clamping block wedge-shaped protrusion of the end part anchoring device, which are contacted with the carbon fiber plate, are subjected to rough treatment, and structural adhesive is coated; the edge of the port of the wedge-shaped groove and the wedge-shaped bulge is arc-shaped.
3. The middle jacking tension prestressed unbonded prestressed carbon fiber plate reinforcing device according to claim 1, characterized in that: the middle part of the lower surface of the movable steel plate of the middle jacking tensioning device is an arc-shaped bulge.
CN202022817251.2U 2020-11-30 2020-11-30 Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus Active CN213774608U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022817251.2U CN213774608U (en) 2020-11-30 2020-11-30 Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022817251.2U CN213774608U (en) 2020-11-30 2020-11-30 Middle part jacking stretch-draw prestressing force's unbonded prestressing force carbon fiber plate reinforcing apparatus

Publications (1)

Publication Number Publication Date
CN213774608U true CN213774608U (en) 2021-07-23

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