A multi-level fortification wave surface frictional energy-dissipating shock absorber

Abstract

The invention provides a multi-level fortification wave surface frictional energy-dissipating shock bearing. Four memory alloy cables are arranged at the four corners of the upper connecting steel plate to connect the lower connecting steel plate, and one is bonded to the inside of the upper connecting steel plate and the lower connecting steel plate. The polytetrafluoroethylene plate, the upper support steel plate and the lower support steel plate are arranged in the middle of the polytetrafluoroethylene plate, and the contact surface of the upper support steel plate and the lower support steel plate is a wave surface, which is used to realize the conversion of positive and negative stiffness. One end of a three-link mechanism is respectively connected to the middle positions of the four sides of the upper connecting steel plate, and the other end is fixed on the upper support steel plate. The beneficial effects of the present invention are: improving the restoring force of the multi-level fortification wave surface frictional energy-dissipating type shock-absorbing bearing, reducing the residual displacement of the structure after the earthquake, improving the shock-absorbing energy consumption efficiency of the bridge structure, and being able to withstand the earthquake Play an effective role in protecting the building structure.

Description

Technical field [0001] The present invention relates to a bridge seismic and seismic engineering, and in particular relates to a multi-stage friction surface wave energy fortification type damping bearings. Background technique [0002] With the rapid development of my country's engineering business, the development of bridge engineering and also fly Mengjin. In recent years, frequent earthquakes, falling beam bridge engineering phenomenon has aroused the concern of the majority of scholars. The bridge bearings are important parts of the bridge, which is a key node nexus. So, how to make the bridge stand firm known as an important research topic in the earthquake. [0003] One important way is to set the damping bridge seismic isolation bearings. Refers to a structure for the isolation bearing support means provided to achieve the required isolation is to increase the isolation layer between the foundation and the superstructure, mounted rubber bearing, play soft connection with ...

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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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