Separation-type prestressed carbon fiber cloth tensioning and adhering device and method

Abstract

The invention discloses a separation-type prestressed carbon fiber cloth tensioning and adhering device. The device comprises two sliding roller mechanisms, a set of scissor-shaped tensioning mechanism, two thread locking mechanisms and a piece of annular carbon fiber cloth; each of the sliding roller mechanisms comprises a sliding bearing and a connecting shaft, the sliding bearings of the two sliding roller mechanisms are externally sleeved with the annular carbon fiber cloth formed by carrying out overlap joint and adhering the head and the tail in a closed-loop manner; the scissor-shaped tensioning mechanism comprises X-shaped levers, a jacking positioning plate and a jack, and the X-shaped levers are rotated through the jack to tension the annular carbon fiber cloth; each of the thread locking mechanisms comprises two supporting rods and a screw sleeve, a prong is arranged at one end of each supporting rod, and a thread is arranged at the other end of each supporting rod; the screw sleeves are adjusted, so that the prongs at the two ends of each thread locking mechanism are respectively propped against the connecting shafts of the two sliding roller mechanisms to keep a tensioning force in the carbon fiber cloth; tensioning and adhering of the carbon fiber cloth are separated into two independent processes, so that the on-site workload can be obviously lowered, the operating space is reduced, and the local adhering reinforcement is facilitated.

Description

technical field [0001] The invention relates to a carbon fiber cloth pasting and strengthening technology, in particular to a device and method for pasting a prestressed carbon fiber cloth in a local area. Background technique [0002] Due to the small damage of materials, local defects in connections and stress concentration phenomena, etc., during the use of stressed components, small damages (defects) tend to be prone to instability and expansion and gradually break, which reduces the service life of the structure and endangers structural safety and personal safety. . The strength of the stress-strain field at the crack tip and the magnitude of the fatigue stress amplitude are the decisive factors for crack propagation. The use of carbon fiber materials to paste and strengthen local details of steel structures can improve the service life of structures, reduce the stress concentration factor of local structural details, the stress amplitude of crack tips, and the stress ...

AI Technical Summary

Problems solved by technology

[0004]However, 1) The steel structure has stiffeners, trim strips, trim panels and other components, and the structure is complex. , arc area, etc.) when pasting and strengthening cracks or damages, the construction operation space is very limited, and the existing carbon fiber cloth tensioning device is difficult to meet the needs of local reinforcement within the limited operation space

2) The prestressed carbon fiber cloth length, pasting area, and tension tonnage required for pasting and strengthening local areas with prestressed carbon fiber cloth are relatively small, and the use of large carbon fiber tensioning devices will cause a lot of waste of resources

4) The traditional carbon fiber cloth stretching method has a large prestress loss in short-bundle carbon fiber cloth, and its effective prestress is difficult to accurately determine, and the quality of pasting and reinforcement and the efficiency of reinforcement construction need to be improved

5) The on-site environment is complex. Compared with factory prefabrication, the quality and efficiency of on-site construction are often more difficult to guarantee

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