Lead core tenon limiting damper system

Abstract

A lead core tenon limiting damper system can not only prevent beam bodies from falling off longitudinally and transversely but also achieve vertical limiting of the beam bodies in an earthquake and meanwhile can achieve the effects of seismic reduction and energy dissipation. All assemblies are replaceable modular products so that the assemblies can be conveniently repaired and easily replaced after the earthquake. The lead core tenon limiting damper system comprises a steel tenon and a steel buckle. The steel tenon comprises a head, a buckle fixing section, a tapered section and an anchor plate from top to bottom, wherein a tapered cavity is formed in the tapered section, and a lead core is poured in the tapered cavity. The outer end of the steel buckle embraces the steel buckle fixing section, and a bottom plate is located at the inner end of the steel buckle. The steel tenon and the steel buckle are arranged on the outer side of padstone in the transverse direction of a bridge. The steel tenon is fixedly mounted on the top of a pier body through high-strength bolt assemblies penetrating through mounting holes in the anchor plate of the steel tenon, and the steel buckle is fixedly installed on the side wall of a beam body through high-strength bolt assemblies penetrating through mounting holes in the bottom plate of the steel buckle.

Description

technical field [0001] The present invention relates to bridges, in particular to a lead core tenon limit damper system, which is mainly used in bridges with relative displacement between piers and girders such as simply supported beams, continuous beams (rigid structures), cable-stayed bridges, etc., during earthquakes, Under impact loads such as vehicles (trains), it plays the role of vertical, horizontal, and vertical three-way limit and shock absorption (vibration) energy dissipation, so as to restrain the vibration of the beam body and reduce the distance between the beam body and the beam body, and the beam body and the pier. collision between. Background technique [0002] Simply supported girder bridges, continuous girder (rigid frame) and other girder bridges are the most commonly used bridge types in traffic engineering. The girder drop caused by excessive relative displacement between the girder part and the abutment is the primary cause of bridge collapse in eart...

AI Technical Summary

Problems solved by technology

However, these current anti-drop beam devices have certain limitations, such as: it is difficult to realize vertical, horizontal, and vertical three-way limit; energy consumption and limit function are separated; energy dissipation capacity is limited; conventional friction pendulum bearings, The shock-absorbing and isolating measures such as hyperboloid spherical shock-absorbing and isolating bearings will fail when the vertical earthquake is strong; the cost is relatively high

In recent years, some scholars have also studied the shock-absorbing tenon, but it has no damping effect.

In addition, some new anti-fall beam devices use some complex structures or new materials, resulting in high costs and cannot be popularized and applied; the process is complicated, the repair after the earthquake is difficult, and the replaceability is poor.

[0003] In addition, locking devices are commonly used in the longitudinal vibration control of beams introduced under impacts such as train braking and traction, but the locking devices have limitations such as high cost, oil leakage, and relatively small damping ratio.

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