Speed-locking friction pendulum damping support

Abstract

The invention relates to the technical field of bridge installation, and discloses a speed-locking friction pendulum damping support. The damping support comprises an upper support plate, a sphericalpanel, a middle steel plate and a lower support plate; the upper end face and the lower end face of the spherical panel are both spherical, the lower end face of the upper support plate is matched with the upper end face of the spherical panel, and the upper end face of the middle steel plate is matched with the lower end face of the spherical panel, the bottom of the upper support plate is fixedly provided with baffles through anti-shearing bolts, the baffles are horizontally arranged around the middle steel plate, and the inner ends of the baffles are in contact limit with the outer end faceof the middle steel plate; a mounting groove is formed in the lower portion of the middle steel plate, a boss is arranged on the upper surface of the lower support plate, and the boss is arranged inthe mounting groove; the bottom of the mounting groove is in plane contact fit with the top of the boss; a circumferential communication cavity is formed between the outer end face of the boss and thewall of the mounting groove and is used for being provided with speed locking layers; the speed locking layers are in contact with the groove wall and the boss respectively, and the speed locking layers are composed of shear thickening materials. During normal displacement, a lifting phenomenon does not occur, and the damping support can conduct full-displacement damping under an earthquake state.

Description

technical field [0001] The invention relates to the technical field of bridge installation, in particular to a speed-locking friction pendulum damping support. Background technique [0002] Nowadays, there are many kinds of shock-absorbing bearings for bridges, such as high-damping rubber bearings for roads, lead-core rubber bearings, friction pendulum bearings for highways and railways, and E-shaped steel bearings, all of which have significant shock-absorbing effects. [0003] The shock absorption principle of the friction pendulum bearing consumes frictional energy through the conversion of kinetic potential energy. However, it has a shortcoming that height changes will occur in the process of normal compensation displacement. Even if the normal displacement and seismic displacement are separated by a certain structure so that there will be no height change under normal displacement, there will still be There is a section of displacement space in the lower bearing plate ...

AI Technical Summary

Problems solved by technology

However, it has a shortcoming that height changes will occur in the process of normal compensation displacement. Even if the normal displacement and seismic displacement are separated by a certain structure so that there will be no height change under normal displacement, there will still be There is a section of displacement space in the lower bearing plate with no or weak shock absorption performance (that is, the normal displacement area), that is, under the earthquake state, it is necessary to complete the displacement action in the normal displacement area first, and then perform the earthquake displacement, and the full displacement cannot be performed. Displacement shock absorption

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