Seismic mitigation and isolation structure of bridge body

Abstract

The invention relates to a seismic mitigation and isolation structure of a bridge body, a supporting plate is slidably connected in a mounting cover at the top of a base, the top of the supporting plate is symmetrically and fixedly provided with a plurality of arc-shaped steel plates, the tops of the arc-shaped steel plates are fixedly provided with the same fixing plate, and the fixing plate is slidably connected with the inner wall of the mounting cover. The top end of a supporting column fixedly mounted on the top of the fixing plate extends to the position above the mounting cover and is fixedly provided with a mounting plate, the inner wall of the bottom of the mounting cover is symmetrically and rotationally connected with rotating rods, the top ends of the rotating rods are rotationally connected with pressing rods, and the top ends of the two pressing rods are rotationally connected with the bottom of the supporting plate; Sliding covers are symmetrically and fixedly connected to the inner wall of the bottom of the mounting cover, sliding plates are elastically and slidably connected to the sliding covers, the bottom ends, rotationally connected with screws, of the sliding plates extend into the sliding covers and are in transmission connection with the inner walls of the sliding covers, and nuts are in threaded connection with the screws and are rotationally connected with rotating rods and pressing rods correspondingly. The seismic mitigation and isolation structure can realize three-stage seismic mitigation on a bridge plate. The bridge plate is well protected, and the service life of the bridge plate is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of bridges, and relates to a shock absorbing and isolating structure of a bridge girder body. Background technique [0002] Earthquake is one of the natural disasters that pose a great threat to human beings. Once bridges and other building structures are damaged during an earthquake, it will pose a serious threat to the safety of human life and property, and will also lead to secondary disasters. As a reasonable and effective anti-seismic means, anti-seismic technology has been more and more used in bridges and other building structures. Among them, the anti-seismic bearing is one of the most widely used anti-seismic devices. At present, the more common anti-vibration bearings include lead core rubber bearings, high damping rubber bearings, friction pendulum bearings and steel damping bearings. [0003] Lead core rubber bearings have insufficient bearing capacity and poor durability, causing pollution to t...

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Problems solved by technology

[0003] Lead core rubber bearings have insufficient bearing capacity and poor durability, causing pollution to the environment, and are facing the situation of being gradually eliminated; high-damping rubber bearings also have insufficient bearing capacity and poor durability; friction pendulum bearings It is often difficult to meet the sliding requirements of the bearing during normal use

The main energy-dissipating components of steel damping bearings are mild steel sheets, which are often arranged around the bearings, which not only affects the appearance, but also makes it inconvenient to install when the distance between adjacent bearings is relatively close, especially on the shared piers of double bridges This is most likely to happen at

Moreover, the above-mentioned supports generally do not have the function of vertical shock absorption and isolation, and can only perform horizontal shock absorption and isolation. Therefore, we propose a shock-absorbing and isolation structure for bridge beams to solve the above-mentioned problems.

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