CN216076451U

CN216076451U - Prestressing force carbon fiber plate stress supplementing device

Info

Publication number: CN216076451U
Application number: CN202120834278.4U
Authority: CN
Inventors: 韩松; 谭成; 马正兴; 姜记冰
Original assignee: Shanghai Horse Construction Co ltd
Current assignee: Shanghai Horse Construction Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-03-18
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to a prestress carbon fiber plate stress supplementing device, which comprises a concrete member, a carbon fiber plate and a roll shaft, wherein the carbon fiber plate is positioned below the concrete member and applies certain prestress to the concrete member, one or more jacking areas are arranged between the concrete member and the prestress carbon fiber plate in a jacking and stretching mode, the roll shaft is arranged in the jacking areas, and the diameter of the roll shaft is matched with the jacking amount of the corresponding jacking areas along the direction parallel to the application direction of the prestress. According to the prestress carbon fiber plate stress supplementing device, only one part of the roll shaft is added between the concrete member and the prestress carbon fiber plate, the roll shaft is used for replacing an additional carbon fiber plate, the carbon fiber plate is prevented from being newly added, the prestress lost by the member is effectively supplemented, the utilization efficiency of the original carbon fiber plate is effectively improved, the cost for reinforcing the concrete member is reduced, the practicability is high, and the device can be popularized in a large range.

Description

Prestressing force carbon fiber plate stress supplementing device

Technical Field

The utility model belongs to the technical field of concrete reinforcement, and particularly relates to a stress supplementing device for a prestressed carbon fiber plate.

Background

The carbon fiber plate is used as a common reinforcing material and has the characteristics of light weight, high strength and corrosion resistance. The use mode of the carbon fiber plate is divided into direct adhesion to the surface of a component and prestress application by means of an anchorage device and the like. The prestressed carbon fiber plate is an active bending-resistant reinforcing means, and can effectively improve the bearing capacity of the member and control cracks and member deformation. However, in the long-term use, the loss of the prestress occurs due to the relaxation of the carbon fiber, the creep of the concrete, and the like, and the reinforcing effect is reduced. The conventional solution is to add an additional carbon fiber plate and perform pre-stress tensioning, which can supplement the pre-stress lost by the components, but the additional amount of work causes higher cost and reduces the use efficiency of the original carbon plate.

Disclosure of Invention

The utility model aims to overcome the defects that in the long-term use process, due to carbon fiber relaxation, concrete creep and the like, prestress loss occurs, an additional carbon fiber plate is additionally arranged, the prestress tensioning cost is high, and the use efficiency of the original carbon plate is reduced in the prior art, and provides a prestress carbon fiber plate stress supplementing device.

In order to achieve the purpose, the technical scheme of the application is as follows:

the utility model provides a prestressing force carbon fiber plate stress supplementing device, includes the concrete component and is located this concrete component below and applys certain prestressing force's carbon fiber plate to this concrete component, still includes the roller, the concrete component with jacking stretch-draw has one or more jacking region between the prestressing force carbon fiber plate, the roller set up in the jacking region, the diameter of roller with correspond the jacking region and apply the jacking volume phase-match of direction along being on a parallel with the prestressing force.

The preferable technical scheme is as follows:

according to the stress supplementing device for the prestressed carbon fiber plate, the jacking amount in the jacking area along the direction parallel to the prestress direction is 2-3mm larger than the diameter of the roller shaft.

According to the stress supplementing device for the prestressed carbon fiber plate, the concrete member and the prestressed carbon fiber plate are encapsulated through structural adhesive.

The stress supplementing device for the prestressed carbon fiber plate further comprises anchorage devices respectively located at two ends of the carbon fiber plate, wherein the carbon fiber plate is anchored below a concrete member through the anchorage devices and exerts certain prestress on the concrete member.

Compared with the prior art, the technical scheme claimed by the utility model at least has the following technical effects:

according to the prestress carbon fiber plate stress supplementing device, only one part of the roll shaft is added between the concrete member and the prestress carbon fiber plate, the roll shaft is used for replacing an additional carbon fiber plate, the carbon fiber plate is prevented from being newly added, the prestress lost by the member is effectively supplemented, the utilization efficiency of the original carbon fiber plate is effectively improved, the cost for reinforcing the concrete member is reduced, the practicability is high, and the device can be popularized in a large range.

Drawings

FIG. 1 is a schematic view of a prestressed carbon fiber plate reinforcing structure in the prior art;

FIG. 2 is a schematic structural diagram of a device for supplementing stress to a prestressed carbon fiber plate according to the present invention;

100, concrete members; 200. a carbon fiber sheet; 300. and (4) a roll shaft.

Detailed Description

The utility model will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

For a concrete beam, the engineering structure of the concrete beam is aged along with the increase of the service time, and reinforcement measures are needed for the reasons of change of service functions, problems of engineering quality, natural disasters and the like. The existing common bridge reinforcing methods comprise a section-enlarging reinforcing method, a steel plate-pasting reinforcing method, a carbon fiber cloth reinforcing method and the like, which all belong to passive reinforcement, and only after the bridge structure is damaged and generates stress deformation can the carbon fiber cloth and the steel plate be tensioned and play a role, so that the reinforcing effect is limited. The prestress carbon fiber plate is reinforced by adopting an active reinforcing method, and the carbon fiber plate is tensioned and generates prestress to reinforce the reinforced concrete bridge. Compared with the traditional carbon fiber cloth reinforcing method, the prestress carbon fiber plate bridge reinforcing method can give full play to the high strength effect of the carbon fibers, and has stronger corrosion resistance and durability and greatly enhanced tensile strength compared with the reinforcing method of enlarging the section or adhering a steel plate.

Referring to fig. 1, in the conventional prestressed carbon fiber plate reinforcing technology, a bonding agent is applied to a contact surface between a carbon fiber plate 200 and a bottom of a concrete member 100, and then the carbon fiber plate 200 is tensioned, but in a long-term use process, a prestressed loss phenomenon occurs due to relaxation of the carbon fiber plate 200, creep of concrete, and the like, and thus a reinforcing effect is reduced. The conventional solution is to add an additional carbon fiber plate 200 and perform pre-stress tensioning, which can supplement the pre-stress lost by the components, but the additional amount of work causes higher cost and reduces the use efficiency of the original carbon plate.

Referring to fig. 2, the present embodiment provides a prestressed carbon fiber plate stress supplementing apparatus, including a concrete member 100, a carbon fiber plate 200 located below the concrete member 100, and a roller 300, wherein the carbon fiber plate 200 is anchored below the concrete member 100 by the anchorage device and applies a certain prestress to the concrete member 100. The concrete member 100 with the jacking stretch-draw has one or more jacking regions between the prestressing force carbon fiber plate 200, the roller 300 set up in the jacking region, the diameter of roller 300 with correspond the jacking volume phase-match of jacking region along being on a parallel with prestressing force direction of application.

Specifically, the jacking area can be obtained by jacking and tensioning between the concrete member 100 and the prestressed carbon fiber plate 200 by using a jack. When specifically arranging, because the jack can damage carbon fiber plate 200 easily when contacting with carbon fiber plate 200, and then can lead to carbon fiber plate 200 life to reduce, consequently this embodiment sets up chamfer or chamfer device in the jack one end of contacting with carbon fiber plate 200 when laying, and then can avoid damaging carbon fiber plate 200.

After the roll shaft 300 is installed, a large amount of clearance is inevitably generated between the roll shaft 300 and the carbon fiber sheet 200. In this embodiment, the concrete member 100 and the prestressed carbon fiber plate 200 are encapsulated by structural adhesive, wherein the structural adhesive may be epoxy structural adhesive.

In a preferred embodiment, the jacking amount in the jacking area along the direction parallel to the prestress direction is 2-3mm larger than the diameter of the roll shaft 300.

Adopt a prestressing force carbon fiber plate stress supplementing device of this embodiment, through only increasing a part of roller between concrete member and prestressing force carbon fiber plate, utilize the roller to replace extra carbon fiber plate, when avoiding newly-increased carbon fiber plate, effectively supplement the prestressing force of component loss, effectively promote former carbon fiber plate's utilization efficiency, reduce the reinforced (rfd) cost of concrete member, the practicality is extremely strong, can promote on a large scale.

Claims

1. The utility model provides a prestressing force carbon fiber plate stress supplementing device, includes the concrete component and is located this concrete component below and applys the carbon fiber plate of certain prestressing force to this concrete component, its characterized in that still includes the roller, the concrete component with jacking stretch-draw has one or more jacking region between the prestressing force carbon fiber plate, the roller set up in the jacking region, the diameter of roller with correspond the jacking region and follow the jacking volume phase-match that is on a parallel with the prestressing force direction of applying.

2. The device for supplementing the stress of the prestressed carbon fiber plate as claimed in claim 1, wherein the lifting amount in the lifting area in the direction parallel to the prestressing direction is 2-3mm larger than the diameter of the roll shaft.

3. The prestressed carbon fiber plate stress supplementing device according to claim 1, wherein said concrete member and said prestressed carbon fiber plate are encapsulated by structural adhesive.

4. The stress supplementing device of claim 1, further comprising anchors respectively located at two ends of the carbon fiber plate, wherein the carbon fiber plate is anchored below the concrete member through the anchors and applies a certain prestress to the concrete member.