Three-level aseismic design method capable of achieving rapid repair after earthquake and applied to bridge pier bottom

Abstract

The invention relates to the field of bridge anti-seismic design, in particular to a three-level anti-seismic design method applied to a bridge pier bottom, which can realize quick repair after an earthquake, is suitable for various newly-built railway bridges, highway bridges and urban viaducts, and can improve the overall anti-seismic performance of the structure under the action of sudden earthquakes. The method is characterized by comprising the following steps that in order to achieve shock absorption and isolation of the bridge pier bottom, the bridge pier bottom is designed to be of an inverted-T-shaped structure; seismic mitigation and isolation supports are installed among the vertical direction, the bearing platform and the bottom of the inverted-T-shaped pier; in the circumferential direction, the bottom of the inverted-T-shaped pier is arranged between the stop block systems; therefore, basic stress stability and safety guarantee are met. The device is suitable for multi-level fortification seismic mitigation and isolation design of a common continuous rigid frame bridge and a high-pier bridge playing a role in controlling the vibration characteristic of a pier body, the seismic mitigation and isolation effect is improved, and the device has the advantages of being simple in structure, low in cost, easy and convenient to install and maintain, easy to repair and the like.

Description

technical field [0001] The invention relates to the field of anti-seismic design of bridges, and specifically proposes a three-level anti-seismic design method applied to the bottom of bridge piers that can realize quick repair after an earthquake, and is applicable to various newly-built railway bridges, highway bridges, and urban viaducts, and can improve the structure's ability to withstand sudden earthquakes. Overall seismic performance under earthquake action. Background technique [0002] Compared with the traditional anti-seismic design concept, the design concept of seismic isolation technology is to transfer the seismic energy from the important structural components to the seismic isolation device through the seismic isolation device, so as to avoid damage to the important structural components, while the seismic isolation device is damaged. When the earthquake occurs, the replacement is relatively simple, which is convenient for quick repair after the earthquake. ...

AI Technical Summary

Problems solved by technology

However, for the currently commonly used continuous rigid frame bridges, due to the consolidation of the upper part, the purpose of seismic isolation design cannot be achieved through seismic isolation bearings; in addition, for some common piers with high For high-pier bridge structures whose own vibration characteristics control their seismic design, the shock absorption effect of the upper shock absorption and isolation technology is not obvious

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