Shock-absorbent power-wasting three-way limiting metal damping device for near-fault bridge and mounting method thereof

Abstract

The invention discloses a shock-absorbent power-wasting three-way limiting metal damping device for a near-fault bridge and a mounting method thereof. The device comprises an elastic-plastic limitingshock-absorbent power-wasting rod and an adjustable connecting plate, wherein the adjustable connecting plate is provided with an inner hole; each cross section of the elastic-plastic limiting shock-absorbent power-wasting rod can simultaneously enter a yield state to realize maximum ductile deformation; the bottom of the elastic-plastic limiting shock-absorbent power-wasting rod is connected withthe top of a bridge pier, a bridge tower crossbeam or an arch rib crossbeam; the top of the elastic-plastic limiting shock-absorbent power-wasting rod extends into the inner hole, the periphery of the top is abutted against the wall of the inner hole along two opposite sides of a bridge direction, and the separation distance n (n is more than or equal to 0) is reserved between two opposite sidesof a top transverse bridge direction and the wall of the inner hole; the adjustable connecting plate is connected with an upper connecting piece; a lifting lug is arranged at the top of the elastic-plastic limiting shock-absorbent power-wasting rod; the bottom of the upper connecting piece corresponding to the inner hole is provided with an anti-pulling pull ring; a gap is arranged between the topend of the lifting lug and the bottom end of the anti-pulling pull ring; and the anti-pulling pull ring and the lifting lug are connected through an anti-pulling pull cable.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a shock-absorbing and energy-consuming three-way limit metal damping device and an installation method for near-fault bridges. Background technique [0002] In the existing long-span bridge structure, during the running of a high-speed train, the main girder bears a large horizontal force due to the large traction braking force of the train, and the traction braking force will cause a large horizontal displacement of the main girder (especially for fully floating system of medium-supported concrete-filled steel tube arch bridges, long-span steel truss cable-stayed bridges, etc.), excessive displacement will cause rail stretching, and deformation of the main beam caused by the joint action of train traction braking loads and other operating loads (such as temperature loads, etc.) When it is too large, the broken rail will be damaged, which will directly affect the driving safety. Therefore,...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the prior art, that is, the existing bridge damper cannot identify the speed change value of the main girder when the train crosses the bridge, so it cannot play the role of damping limit, that is, the limit of the damper. The position function will fail, and at the same time, the vertical seismic intensity is relatively large in the near-field earthquake, and the upper main girder is prone to the above-mentioned shortcomings of falling beam earthquake damage. A kind of shock-absorbing and energy-consuming three-way limit metal damping device for near-fault bridges is provided. installation method

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