Quakeproof facility for steel box girder

Abstract

The utility model discloses an anti-seismic facility for a steel box girder and relates to anti-seismic of a steel box girder bridge. The quakeproof facility used on the steel box girder is arranged between the bottom of the steel box girder and the top of a pier, and is characterized by comprising a round quakeproof stop block and a quakeproof sleeve, the round quakeproof stop block is arranged on the top face of a cross beam on the top of the pier, the quakeproof sleeve is arranged at the bottom of the steel box girder, and the round quakeproof stop block is sleeved with the quakeproof sleeve; the quakeproof facility used on the steel box girder is simple in structure, scientific in design and convenient to use, the round quakeproof check block is arranged on the top face of the pier top cross beam, the quakeproof sleeve is arranged at the bottom of the steel box girder, the quakeproof facility can not only achieve quakeproof in the longitudinal bridge direction, but also achieve quakeproof in the longitudinal bridge direction, the quakeproof facility is hidden between the pier cross beam and the steel girder, and the quakeproof facility is convenient to use. And the top of the bridge pier does not need to be specially provided with a bent cap, so that the size of the bridge pier is reduced, and the structure is finer and graceful.

Description

Technical Field

[0001] The utility model relates to the earthquake protection of steel box girder bridges, in particular to an earthquake protection facility for steel box girders which realizes the limiting function in two directions along the bridge direction and the longitudinal bridge direction, reduces the number of earthquake-proof blocks of the bridge, and can reduce the structural dimensions of pier columns and pier top crossbeams. Background Art

[0002] In the seismic design of steel box girder bridge structures, it is necessary to set up transverse and longitudinal seismic facilities. In the transverse direction, seismic blocks are generally set up on both sides of the pier cap beam. This method increases the size of the pier top cross beam, making the pier top cross beam appear bulky. In the longitudinal direction, seismic blocks are generally set up at the bottom of the main beam, located on both sides of the cap beam in the longitudinal direction. The blocks set up in the traditional way increase the size of the structure, and the number of seismic blocks is large, and the construction process is complicated; at the same time, the blocks are all set up in an exposed way, which makes the structure appear bulky and cumbersome, affecting the landscape effect of the bridge. Summary of the invention

[0003] The utility model aims to solve the problem that in the earthquake-proof design of the existing steel box girder bridge structure, there are many earthquake-proof blocks, their sizes are large and the construction is complicated. It provides an earthquake-proof facility for steel box girders that can achieve limiting effects in both the longitudinal and longitudinal directions of the bridge, reduce the number of earthquake-proof blocks of the bridge, and reduce the structural dimensions of the piers, pier columns and pier top crossbeams.

[0004] The utility model is a seismic facility for a steel box girder, which is arranged between the bottom of the steel box girder and the top of the pier. The utility model is characterized in that the seismic facility comprises a circular seismic stopper and a seismic sleeve, wherein the circular seismic stopper is arranged on the top surface of the cross beam at the top of the pier, the seismic sleeve is arranged at the bottom of the steel box girder, and the seismic sleeve is sleeved on the circular seismic stopper; wherein:

[0005] The anti-seismic sleeve includes a bottom plate stiffening plate, a sleeve steel plate and sleeve stiffening ribs. The bottom plate stiffening plate is fixedly connected to the bottom plate of the steel box beam. The sleeve steel plate is in a hollow cylindrical shape and is fixedly connected to the bottom surface of the bottom plate stiffening plate. The sleeve stiffening ribs are arranged between the back of the bottom plate stiffening plate and the outer wall of the sleeve steel plate.

[0006] The circular shock-proof block is a hollow cylindrical block, which is fixedly connected to the crossbeam on the top of the pier. Horizontal annular steel bars and vertical steel bars are arranged inside the circular shock-proof block. The vertical steel bars are arranged vertically, and the lower section is buried in the top of the pier. Several annular steel bars are fixed on the upper section of the vertical steel bars at equal intervals from top to bottom.

[0007] The inner wall of the sleeve steel plate is pasted with a rubber pad to play a buffering role.

[0008] The shockproof sleeve also includes vertical stiffening ribs, which are connected to the transverse diaphragm and the bottom plate of the steel box beam.

[0009] The utility model discloses an anti-seismic facility for use on a steel box girder, which has a simple structure, a scientific design and is easy to use. A circular anti-seismic block is arranged on the top surface of the cross beam on the top of the pier, and an anti-seismic sleeve is arranged on the bottom of the steel box girder. This anti-seismic facility can not only realize anti-seismic in the longitudinal direction of the bridge, but also realize anti-seismic in the longitudinal direction of the bridge. The anti-seismic facility is hidden between the cross beam of the pier and the steel beam, and does not affect the landscape effect of the bridge. Moreover, there is no need to specially arrange a cap beam on the top of the pier, which reduces the size of the pier and makes the structure more slender and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] Figure 2 It is the plan layout of the pier top.

[0012] Figure 3 This is a top view of the steel box girder bottom plate.

[0013] Figure 4 This is a plan view of the shockproof sleeve.

[0014] Figure 5 It is a schematic diagram of the shockproof stopper structure.

[0015] Among them: steel box girder 1, bridge pier 2, circular shock-proof block 3, shock-proof sleeve 4, bottom plate stiffening plate 5, sleeve steel plate 6, sleeve stiffening rib 7, annular steel bar 8, vertical steel bar 9, rubber pad 10, vertical stiffening rib 11. DETAILED DESCRIPTION

[0016] Embodiment 1: A seismic protection device for a steel box girder is arranged between the bottom of the steel box girder and the top of a bridge pier. The seismic protection device comprises a circular seismic protection block and a seismic protection sleeve. The circular seismic protection block is arranged on the top surface of the cross beam at the top of the bridge pier, the seismic protection sleeve is arranged on the bottom of the steel box girder, and the seismic protection sleeve is sleeved on the circular seismic protection block; wherein:

[0017] The anti-seismic sleeve includes a bottom plate stiffening plate, a sleeve steel plate and sleeve stiffening ribs. The bottom plate stiffening plate is fixedly connected to the bottom plate of the steel box beam. The sleeve steel plate is in a hollow cylindrical shape and is fixedly connected to the bottom surface of the bottom plate stiffening plate. The sleeve stiffening ribs are arranged between the back of the bottom plate stiffening plate and the outer wall of the sleeve steel plate.

[0018] The circular shock-proof block is a hollow cylindrical block, which is fixedly connected to the crossbeam on the top of the pier. Horizontal annular steel bars and vertical steel bars are arranged inside the circular shock-proof block. The vertical steel bars are arranged vertically, and the lower section is buried in the top of the pier. Several annular steel bars are fixed on the upper section of the vertical steel bars at equal intervals from top to bottom.

[0019] The inner wall of the sleeve steel plate is pasted with a rubber pad to play a buffering role. The anti-vibration sleeve also includes vertical stiffening ribs, which are connected to the transverse diaphragm and bottom plate of the steel box beam.

Claims

1. An anti-seismic facility for a steel box girder, arranged between the bottom of the steel box girder and the top of the pier, characterized in that The earthquake-proof facility includes a circular earthquake-proof stopper and an earthquake-proof sleeve. The circular earthquake-proof stopper is arranged on the top surface of the cross beam at the top of the pier, and the earthquake-proof sleeve is arranged at the bottom of the steel box beam. The earthquake-proof sleeve is sleeved on the circular earthquake-proof stopper; wherein: The anti-seismic sleeve includes a bottom plate stiffening plate, a sleeve steel plate and sleeve stiffening ribs. The bottom plate stiffening plate is fixedly connected to the bottom plate of the steel box beam. The sleeve steel plate is in a hollow cylindrical shape and is fixedly connected to the bottom surface of the bottom plate stiffening plate. The sleeve stiffening ribs are arranged between the back of the bottom plate stiffening plate and the outer wall of the sleeve steel plate. The circular shock-proof block is a hollow cylindrical block, which is fixedly connected to the crossbeam on the top of the pier. Horizontal annular steel bars and vertical steel bars are arranged inside the circular shock-proof block. The vertical steel bars are arranged vertically, and the lower section is buried in the top of the pier. Several annular steel bars are fixed on the upper section of the vertical steel bars at equal intervals from top to bottom.

2. The earthquake-proof device for a steel box girder according to claim 1, characterized in that The inner wall of the sleeve steel plate is pasted with a rubber pad to play a buffering role.

3. The earthquake-proof device for a steel box girder according to claim 1, characterized in that The shockproof sleeve also includes vertical stiffening ribs, which are connected to the transverse diaphragm and the bottom plate of the steel box beam.

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