Friction pendulum supporting bases and bridge damping and shock insulation system

Abstract

The invention provides friction pendulum supporting bases and a bridge damping and shock insulation system. Each friction pendulum supporting base comprises an upper base plate assembly, a lower baseplate assembly and a spherical crown lining plate. The spherical crown lining plate is slidingly arranged between the upper base plate assembly and the lower base plate assembly, the lower base plateassembly comprises a baseplate, a lower supporting base plate and a locking assembly, and the lower supporting base plate is slidingly arranged between the baseplate and the spherical crown lining plate; the locking assembly is arranged between the lower supporting base plate and the baseplate, and the locking assembly locks the sliding positions of the baseplate and the lower supporting base plate when the earthquake displacement is larger than the temperature displacement; the sliding friction coefficient of the baseplate and the lower supporting base plate is smaller than that of the spherical crown lining plate and the upper base plate assembly and smaller than that of the spherical crown lining plate and the lower base plate assembly. The bridge damping and shock insulation system comprises a fixed supporting base, a transverse supporting base and the two friction pendulum supporting bases, one friction pendulum supporting base is a vertical supporting base, and the other frictionpendulum supporting base is a multidirectional supporting base. The friction pendulum supporting bases and the bridge damping and shock insulation system have the advantages of being good in dampingand shock insulation effect, high in safe reliability, good in smoothness and the like.

Description

technical field [0001] The invention relates to the field of bridge bearings, in particular to a friction pendulum bearing and a bridge vibration reduction and isolation system. Background technique [0002] In recent years, shock absorption and isolation technology has been widely used in various buildings and bridge projects. As a typical shock-absorbing and isolating bearing, the friction pendulum bearing mainly prolongs the basic natural vibration period of the structure through a specific arc surface, and has high wear resistance, high temperature resistance and stable and adjustable friction coefficient. Advanced materials convert seismic energy into thermal energy, thereby achieving the purpose of seismic isolation and energy consumption. However, the existing friction pendulum bearings have the following problems: [0003] (1) The existing structure adapts to the temperature displacement of thermal expansion and contraction of the bridge deck and the seismic displa...

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Problems solved by technology

[0003] (1) The existing structure adapts to the temperature displacement of thermal expansion and contraction of the bridge deck and the seismic displacement suitable for seismic isolation. The friction coefficient of the friction pendulum support cannot be changed during the working process, resulting in the inability to effectively release the strain of the beam body during temperature displacement. , and at the same time, it cannot achieve excellent shock absorption and isolation effect during earthquake displacement;

[0004] (2) During an earthquake, the existing structural plane slides to the end to drive the swing block to slide, and a collision impact will occur inside the support during the overall swing process, resulting in low operational safety and reliability and low service life of the support;

[0005] (3) When adapting to the temperature displacement of the thermal expansion and contraction of the bridge deck, the existing structure inevitably has a vertical lift due to the sliding of the spherical surface, which makes the smoothness of the upper structure such as the bridge deck poor, and at the same time easily causes damage to the expansion joints;

[0006] (4) Due to the superposition of temperature displacement and earthquake displacement in the existing structure, the displacement of the support is large, resulting in a large thickness of the support plate and the sliding plate, and high economic costs; at the same time, the bridge vibration isolation system adopts the existing double spherical friction The pendulum support is expensive and has a narrow range of use

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