Prestressed fiber cloth tensioning system

Abstract

The invention provides a prestressed fiber cloth tensioning system. The prestressed fiber cloth tensioning system comprises a tensioning end anchor and two fixed end anchors; the tensioning end anchorcomprises a tensioning bottom plate, a tensioning press plate, an upper top plate, a screw rod and a jack; the tensioning bottom plate is fixed on concrete through a rivet; an arch-shaped arc part I,which protrudes upwards, is arranged on the upper end surface of the tensioning bottom plate; two arch-shaped arc parts II, which protrude downwards, are arranged on the lower end surface of the tensioning press plate; the lower end of the jack abuts on the upper end surface of the tensioning press plate; the screw rod is connected with the tensioning bottom plate through a thread; the screw rodpenetrates through a through hole to be in sliding fit with the upper top plate and the tensioning press plate; locking nuts are connected to one parts, above both the upper top plate and the tensioning press plate, of the screw rod through threads; the fixed end anchors comprise fixed bottom plates, fixed press plates and winding drums; the fixed bottom plates are fixed on the concrete through rivets; and the fixed press plates are connected to the fixed bottom plates through bolts. The prestressed fiber cloth tensioning system is simply structured, convenient to mount and suitable for reinforcing large-sized concrete structures such as bridges, piers and so on.

Description

technical field [0001] The invention belongs to the technical field of building structure engineering, and relates to a system for reinforcing reinforced concrete, in particular to a prestressed fiber cloth stretching system. Background technique [0002] Prestressed reinforcement is a method of reinforcing reinforced concrete by adding prestressed fiber cloth or fiber board. It is characterized by forcing the added fiber cloth or fiber board to bear force through prestressing means, changing the internal force distribution of the original structure and reducing the stress level of the original structure. The stress-strain hysteresis characteristic of reinforced structures is completely eliminated. [0003] Since the fiber cloth itself has no tension force, a tension device is needed to tighten it. One end of the fiber cloth is fixed, and the other end is tensioned with a tensioning device. For example, the utility model patent application published by China [Application N...

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Problems solved by technology

[0004] However, the above-mentioned tensioning device is suitable for use on concrete columns. The prestressing force applied by two preloading bolts alone is relatively small, and it is not suitable for large concrete structures such as bridges that require relatively large prestressing forces.

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