Group anchor and method for realizing simultaneous tensioning of multiple prestressed carbon fiber panels

Abstract

The invention discloses a group anchor and a method for realizing simultaneous tensioning of a plurality of prestressed carbon fiber boards, which solves the problem of limited prestress provided in the tensioning of single-layer carbon fiber boards in the prior art, and has the advantages of realizing multi-layer carbon fiber board tensioning. Tensioning and anchoring improves the beneficial effect of the reinforcement efficiency of carbon fiber panels. The specific scheme is as follows: A group anchoring device for simultaneously tensioning multiple prestressed carbon fiber panels, including a first carbon fiber panel, along the length direction of the first carbon fiber panel, It is divided into three sections, both sides of the first carbon fiber board of the first section are fixed in the first anchor cup through the first splint, and at least one side of the first carbon fiber board of the second section is provided with a second carbon fiber board to form a multi-layer structure, The multi-layer structure is fixed in the second anchor cup through the second splint, and all the carbon fiber plates in the multi-layer structure are arranged to protrude from the second anchor cup.

Description

technical field [0001] The invention relates to the field of bridge reinforcement, in particular to a group anchor anchor and a method for realizing simultaneous tensioning of a plurality of prestressed carbon fiber boards. Background technique [0002] At present, the commonly used bridge reinforcement methods mainly include carbon fiber board reinforcement, bonding steel plates, and enlarging sections. Among them, the carbon fiber board reinforcement method has very obvious advantages. The use of carbon fiber board has excellent mechanical properties and good economic benefits, and it is easy to operate on site. It has extremely high engineering promotion and application value and has been widely used in structural engineering. [0003] When using prestressed carbon fiber plates to reinforce concrete bridges, how to effectively exert the high-strength properties of carbon fiber materials has always been a hot and difficult issue in the field of bridge reinforcement researc...

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Problems solved by technology

However, the inventor found that, limited to the applicable conditions of the current prestressed carbon fiber plate anchorage, only a single layer of carbon fiber plate can be stretched, and the prestress provided by a single carbon fiber plate is very limited.

However, the cross-section of the actual bridge structure is often large in size, but because the single-layer carbon fiber plate is stretched, the effective tension construction area is not large, and the effective reinforcement area of ​​​​the reinforced bridge is limited. Due to the above-mentioned problems, As a result, when prestressed carbon fiber plates are used in solid bridge reinforcement projects, the load-carrying capacity of the main girder after design reinforcement is smaller than that of the main girder before reinforcement, and the crack resistance of the beam body during normal use is not greatly improved. , the reinforcement effect is not obvious

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