Carbon fiber bar in-vitro prestressed tensioning device and using method thereof

Abstract

The invention relates to a carbon fiber bar in-vitro prestressed tensioning device and a using method thereof. The carbon fiber bar in-vitro prestressed tensioning device comprises a center-hole jack (3) connected with a hydraulic system (11) and a first force transmission screw rod (1) which is arranged in the center-hole jack (3) and can move under the drive of the center-hole jack (3), wherein one end of the first force transmission screw rod (1) is fixed on the center-hole jack (3) through a nut (14), and the other end of the first force transmission screw rod (1) is connected with one end of a second force transmission screw rod (15) through a force transmission mechanism; and the other end of the second force transmission screw rod (15) is connected with an anchoring mechanism for fixing carbon fiber bars. The carbon fiber bar in-vitro prestressed tensioning device disclosed by the invention has the advantages of convenience in construction and short period, and can perform fast reinforcement on a bridge under the situation of not interrupting traffic, reduce the loss caused by interruption of the traffic and further effectively save social and economic cost; and the applied pre-stressing force can be controlled and adjusted timely, the purpose of secondary tensioning is achieved, the whole process is performed on the bridge under the situation of not interrupting the traffic and the social and economic cost is further effectively saved.

Description

technical field [0001] The invention relates to a prestressed tensioning device and a method for using the same, in particular to an external prestressed tensioning device for carbon fiber ribs and a method for using the same. Background technique [0002] When strengthening bridge structures with external prestressing, it is necessary to consider how to effectively apply prestressing to external tendons, and apply prestressing through reasonable tensioning methods, which involves the tensioning of external prestressing. Due to the high tensile strength and high tensile force of carbon fiber tendons, when the external prestressed carbon fiber tendons are arranged at the bottom of the beam of the bridge structure, how to effectively stretch them is the key problem to be solved by the tensioning device. At the same time, carbon fiber tendons have high tensile strength and good corrosion resistance. During use, their strength will not decrease, but in the actual use of engineer...

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Problems solved by technology

[0003] The present invention mainly solves the problem existing in the prior art that due to the high tensile strength and large tensile force of the carbon fiber reinforcement, when the externally prestressed carbon fiber reinforcement is arranged at the bottom of the beam of the bridge structure, the traditional technology cannot perform effective tensioning on it. and other technical problems; provide a convenient construction and short cycle, which can quickly reinforce the bridge without interrupting the traffic, reduce the loss caused by the interrupted traffic, thereby effectively saving social and economic costs, and at the same time, stretching The process is controllable, and the carbon fiber reinforced external prestressed tensioning device and its use method can ensure the overall mechanical balance of the device and the loading safety of the structure

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