An energy-dissipating shock-absorbing tie-beam for double-limb bridge piers

Abstract

The invention discloses an energy-dissipating and shock-absorbing tie beam for double-leg bridge piers, which relates to the technical field of bridge construction and includes four sleeves fixed in an X-shaped cross in the same vertical plane, and the included angle between two adjacent sleeves is up and down. is α; there is a sliding telescopic rod inside the sleeve, a spring is set between the sliding telescopic rod and the bottom of the sleeve, and the outer end of the sliding telescopic rod is fixed on the pier of both limbs; a sliding friction surface is set between the sliding telescopic rod and the sleeve, and through the sliding friction Heat generated by surface sliding friction realizes energy consumption and shock absorption. The pier body is horizontally restrained by using the X-shaped cross sleeve to improve the static and dynamic stability of the pier; the friction between the sliding telescopic rod and the sleeve is used to reduce the load on the pier The seismic energy is converted into thermal energy through frictional heat and dissipated, which will reduce the seismic dynamic response of bridge piers and the development degree of plastic hinges, etc., and effectively protect the main structures such as bridge piers and main girders from occurring or reduce earthquake damage under seismic loads.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to an energy-dissipating and shock-absorbing tie beam for double-leg bridge piers. Background technique [0002] At present, the design and construction of bridges are not only developing towards long-span or even super-long-span, but also towards high-pier or even super-high-pier bridges. In order to reduce the construction cost and ensure the safety of the bridge structure, high-pier bridges often use double-leg piers, the most common of which are double-leg piers and high-pier rigid-frame bridges or double-leg bridges. Continuous girder bridges with column-high piers. The pier height of these bridges is usually set to more than 40 meters. At present, the highest pier in China is about 200 meters, which belongs to super-high pier bridges. [0003] As the height of bridge piers continues to increase, not only the static stability under operational loads needs to be con...

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Problems solved by technology

[0003] As the height of bridge piers continues to increase, not only the static stability under operational loads needs to be controlled, but also the seismic performance design under earthquakes is particularly important, and the current "Seismic Design Rules for Highway Bridges" only applies to pier heights Bridges less than 40 meters, and bridges with pier heights exceeding 40 meters and piers entering nonlinearity require special research

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