Magnetic pole buffering-type communicating cable damping limiter

Abstract

The invention relates to a magnetic pole buffering-type communicating cable damping limiter. The magnetic pole buffering-type communicating cable damping limiter includes two rigid bars whose projection coincides in the vertical direction, connecting blocks are fixedly arranged at the two ends of the rigid bars respectively, the rigid bar located on the upward side is connected with a main beam through the connecting blocks, and the rigid bar located on the downward side is connected with a pier through the connecting blocks; a plurality of circles of cables are wound by the two rigid bars, the two ends of the cables are connected by cable clips; and magnet sheets are arranged between the two connecting blocks in the same vertical direction and arranged on the opposite sides of the two connecting blocks, and the magnet sheets have opposite magnetism and can provide a certain restoring force when the limiter displaces. According to the magnetic pole buffering-type communicating cable damping limiter, damage caused by normal deformation of a bridge to the limiter can be avoided; and limiting of bidirectional deformation and displacement can be realized.

Description

Technical field [0001] The invention belongs to the technical field of bridges, and specifically relates to a magnetic pole buffer type connected stay cable shock absorber limiter. Background technique [0002] The main bearing arrangements adopted by small and medium-span bridges in our country are full-bridge layout plate rubber bearings or middle pier plate rubber bearings, and side pier PTFE slide rubber bearings. Because there is no connection between the support, the beam and the bridge pier, this type of bridge only relies on friction to transmit the horizontal seismic force. The support will produce a large displacement during an earthquake, often causing serious disasters such as beam drop and collision. [0003] At present, the commonly used limit devices in my country include steel plate limit devices, prestressed steel strand limit devices and cable limit devices. They are steel plate limiters, prestressed steel strand limiters, and cable limiters. [0004] The inventor ...

AI Technical Summary

Problems solved by technology

[0004] The inventor believes that: the steel plate limiter will limit the relative displacement of the pier beam caused by temperature changes in the normal service state of the bridge, thereby causing the limiter or the bridge structure to be damaged; the prestressed steel strand limiter and the Although the cable limit device can avoid this problem by reserving the initial slack, since the working principle of these two limit devices is to limit the position through the restoring force generated by the tension of the steel strand or cable, only It can limit the displacement of the main beam in a single direction. When the relative displacement of the pier beam in the opposite direction occurs, the steel strand or cable will be in a relaxed state and cannot generate restoring force

Therefore, the cable limiting devices arranged on both sides of the same span bridge will not play the role of limiting at the same time, which will reduce the working efficiency of the limiting device

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