Multistage fortification wave surface friction energy dissipation type damping support

Abstract

The invention provides a multistage fortification wave surface friction energy dissipation type damping support. Four memory alloy cables are arranged at four corners of an upper connecting steel plate and connected with a lower connecting steel plate; inner sides of the upper connecting steel plate and the lower connecting steel plate are bonded with polytetrafluoroethylene plates, an upper support steel plate and a lower support steel plate are arranged between the polytetrafluoroethylene plates, and the contact surface of the upper support steel plate and the lower support steel plate is awavy surface and is used for realizing conversion between positive rigidity and negative rigidity. One end of a three-connecting-rod mechanism is connected to the middle of each of four sides of the upper connecting steel plate, and the other end is fixed to the upper support steel plate. The damping support has the beneficial effects that a restoring force of the multistage fortification wave surface friction energy dissipation type damping support is improved, a residual displacement of a structure after an earthquake is reduced, damping energy dissipation efficiency of a bridge structure isimproved, and a building structure can be effectively protected in the earthquake.

Description

technical field [0001] The invention relates to the fields of bridge anti-seismic and earthquake engineering, in particular to a multi-level fortification wave surface frictional energy-dissipating type shock absorber. Background technique [0002] With the rapid development of engineering in our country, the development of bridge engineering is also advancing by leaps and bounds. In recent years, due to the frequent occurrence of earthquakes, the engineering phenomenon of bridge beam drop has attracted the attention of many researchers. The bridge bearing is an important part of the bridge, and it is a key node connecting the preceding and the following. Therefore, how to make bridges stand upright in earthquakes has become an important research topic. [0003] An important method of bridge anti-seismic is to set up shock-absorbing and isolating bearings. The seismic isolation bearing refers to the supporting device set up by the structure to meet the seismic isolation r...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a multi-level fortification wave surface friction energy-dissipating shock bearing with large recovery ability, strong negative stiffness and good shock absorption and energy dissipation effect, which overcomes the existing common plate rubber bearing The shortcoming of insufficient shear capacity, the use of shape memory alloy cables can store strain energy after the lateral displacement of the upper part of the support, thereby constraining the displacement of the upper structure and preventing the occurrence of falling beams

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