Group anchor anchorage device and method for simultaneously tensioning plurality of prestressed carbon fiber plates

Abstract

The invention discloses a group anchor anchorage device and method for simultaneously tensioning a plurality of prestressed carbon fiber plates. A problem that in the prior art, a provided prestress is limited when a single-layer carbon fiber plate is tensioned is solved. The multi-layer carbon fiber plate can be tensioned and anchored; and reinforcing efficiency of the carbon fiber plate is improved. The group anchor anchorage device capable of simultaneously tensioning the plurality of prestressed carbon fiber plates comprises a first carbon fiber plate. The first carbon fiber plate is divided into three sections along a length direction of the first carbon fiber plate, two sides of the first section of the first carbon fiber plate are fixed in a first anchor cup through a first clampingplate, at least one side of the second section of the first carbon fiber plate is provided with a second carbon fiber plate to form a multi-layer structure, the multi-layer structure is fixed in thesecond anchor cup through a second clamping plate, and all the carbon fiber plates in the multi-layer structure protrude out of a second anchor cup.

Description

technical field [0001] The invention relates to the field of bridge reinforcement, in particular to a group anchor and a method for realizing simultaneous tensioning of multiple prestressed carbon fiber plates. Background technique [0002] At present, the commonly used bridge reinforcement methods mainly include carbon fiber plate reinforcement, sticking steel plates, and enlarging the cross-section. Among them, the carbon fiber plate reinforcement method has very obvious advantages. The use of carbon fiber plates has excellent mechanical properties and good economic benefits, and it is convenient to operate on site. It has a very high value of engineering promotion and application, and has been widely used in structural engineering. [0003] When using prestressed carbon fiber panels to strengthen concrete bridges, how to effectively utilize the high-strength properties of carbon fiber materials has always been an engineering hotspot and difficult problem in the field of b...

AI Technical Summary

Problems solved by technology

However, the inventors have found that, limited to the applicable conditions of the current prestressed carbon fiber plate anchors, only single-layer carbon fiber plates 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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