Energy-dissipation and shock-absorption tie beam for double-limb pier

Abstract

The invention discloses an energy-dissipation and shock-absorption tie beam for a double-limb pier and relates to the technical field of bridge building. The tie beam comprises four sleeves fixed in the same vertical plane in an X-type crossed manner, wherein the two longitudinally adjacent sleeves form an included angle alpha; a sliding telescopic rod is arranged in each sleeve, a spring is arranged between each sliding telescopic rod and the bottom of the corresponding sleeve, and the outer end of each sliding telescopic rod is fixed on the double-limb pier; a sliding friction surface is arranged between each sliding telescopic rod and the corresponding sleeve, and energy dissipation and shock absorption are realized through heat generation during sliding friction of the sliding friction surfaces. The sliding telescopic rods are connected with the double-limb pier, a pier body is horizontally and laterally restrained by means of the X-type crossed sleeves, and the static-dynamic stability of the pier is improved; by means of friction between each sliding telescopic rod and the corresponding sleeve, seismic energy borne by the pier can be converted into heat energy to be dissipated through heat generation during friction, seismic dynamic response of the pier, the plastic hinge development degree and the like can be reduced, and the situations that main structures such as the pier, a girder and the like are damaged in earthquakes can be effectively avoided or reduced.

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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