Adjustable damping device of external prestressing cable during bridge reinforcement

Abstract

The invention discloses an adjustable damping device of an external prestressing cable during bridge reinforcement. The adjustable damping device of the external prestressing cable during the bridge reinforcement comprises two semicircular cable clips, supports, connecting plates, anchoring plates and bolts; the cable clips are movably connected with one end of each of the supports through the bolt; the other ends of the supports are movably connected with the anchoring plates through the connecting plates; the anchoring plates are fixedly connected with a supporting body through the bolts; the moveable supports comprise two supports with bolt holes on both sides thereof, and form a triangle with a supporting surface; two feet of the movable supports are in bolt connection with the anchoring plates through the connecting plates; the distance between the two support feet is adjustable, so that the shape of the triangle can be changed to adapt to change of the distance between the centers of the cable clips and the supporting surface; a junction end of the supports is connected with the cable clips through the bolt; and the bolts are adjusted to rotate the cable clips so as to adapt to the inclination angle of the external cable. The adjustable damping device of the external prestressing cable during the bridge reinforcement is high in adaptability; and on-site lofting manufacturing is not required and batch production can be achieved, so that the free length of the external cable can be reduced and the damping effect can be achieved.

Description

technical field [0001] The invention relates to bridge reinforcement engineering technology, in particular to an adjustable damping device for external prestressed cables in bridge reinforcement. Background technique [0002] Prestressed concrete and reinforced concrete bridges are often reinforced by external prestressing, which requires external prestressed steel cables to be arranged close to the beam ribs or webs. Generally, the steel cables are arranged in a straight line or broken line, and the length of the steel cables is usually several Ten meters, hundreds of meters. The external cable will vibrate due to its own weight and the effect of vehicles passing the bridge. The longer the cable length, the greater the vibration, which will have an adverse effect on the force and service life of the cable. It is necessary to use cable clips to fix the cable every few meters to reduce the free length and sag, and play a role in damping and supporting the external cable. Th...

AI Technical Summary

Problems solved by technology

The cable clamp is supported by the bracket, and the supporting surface is usually the beam rib or web closest to the outer cable. Since the beam rib is often of variable thickness, the distance between the center line of the outer cable and the supporting surface will be unequal, and the length of the bracket will also vary. Inconsistent, if the external cable is inclined, the cable clamp must also have the same inclination, which is very inconvenient during construction and installation. It can only be made on site by setting out and cutting materials, which is labor-intensive and time-consuming

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