Gravity type bridge combined anti-seismic stop block

Abstract

The utility model relates to a gravity type bridge combined anti-seismic check block which comprises a cover beam and a box beam erected at the upper end of the cover beam, steel sliding blocks with arc-shaped bottoms are fixedly arranged at the bottoms of the two sides of the box beam, slope section check blocks are arranged on the two sides of the cover beam, and sliding connection slope sections of the slope section check blocks and the steel sliding blocks are in an obliquely upward cambered surface shape from inside to outside. Two upper support cushion stones are fixedly arranged on the lower end face of the box girder in a spaced mode, two lower support cushion stones are fixedly arranged on the upper end face of the cover beam, two lower auxiliary check blocks are fixedly arranged on the upper end face of the cover beam between the two lower support cushion stones in a spaced mode, and the upper ends of the two lower auxiliary check blocks are fixedly connected with upper auxiliary check blocks through high-strength anti-shearing bolts. The traditional rigid collision between the baffle block and the main beam is converted into flexible sliding of materials between the sliding block and the slope section, and the kinetic energy of an earthquake is fully converted into the action of lifting the gravity of the main beam and the friction among the materials, so that the effects of energy dissipation and shock absorption are realized, and multiple earthquake-proof defense lines can be realized; and the anti-seismic capacity and the recovery capacity of the bridge are remarkably improved on the premise of protecting structural members of the bridge.

Description

Technical Field

[0001] The utility model relates to a gravity-type bridge combined anti-seismic stopper. Background Art

[0002] With the development of bridge construction, new technologies and processes for bridge construction are constantly being introduced, improved, created and developed. The number of newly built bridge lines is increasing. For bridges in strong earthquake zones, especially bridges across faults, large displacements will occur between piers and beams under the action of earthquakes. In order to prevent the occurrence of lateral beam falling, seismic blocks are usually set at both ends of the piers and cap beams.

[0003] Although traditional seismic blocks can reduce the probability of horizontal beam drop, they can cause many serious problems if they are improperly set. For example, if the block stiffness is too small, it is easy to be damaged under the action of an earthquake, causing a large displacement of the beam body and causing horizontal beam drop, which brings great inconvenience to post-earthquake maintenance and reinforcement; if the block stiffness is too large, the collision between it and the main beam will not only cause damage to the main beam itself, but also greatly increase the internal force of the lower structure.

[0004] Among the currently disclosed prior art: CN210797240U discloses a rolling and lifting bridge seismic stopper device, wherein the main beam is mounted on the cap beam through a pendulum support, and welded steel boxes are arranged at both ends of the cap beam, and the welded steel box is provided with a transition section of an arc-shaped step facing the main beam; and a roller with a rotating shaft perpendicular to the steel rod is provided, and the roller is against the step surface of the lowest step of the welded steel box. Under the action of an earthquake, the friction between the component materials and the lifting of the main beam to overcome the gravity work are relied on to dissipate the seismic energy, and multiple defenses are effectively realized to resist the action of an earthquake. Under the action of a small or medium earthquake, the seismic energy is dissipated by the friction between the rubber leather sleeve on the circular steel cake and the rubber layer pasted on the arc transition section of the welded steel box and the lifting of the main beam to overcome the gravity work; under the action of a strong earthquake, the seismic energy is dissipated by the friction between the rubber leather sleeve on the circular steel cake and the rubber layer pasted on the arc transition section of the welded steel box and the lifting of the main beam to overcome the gravity work. However, it has the following disadvantages: 1: In the design process of the seismic stopper of the lifting bridge in the above technology, it is not considered how the beam body can achieve vertical displacement during the sliding of the circular steel cake. Disadvantage 2: The seismic stopper of the lifting bridge does not consider that after the beam body slides, rises and tilts, the beam body will cause damage to the support. Disadvantage 3: In the sliding process of the beam body in the above technology, the support at one end will be emptied. Disadvantage 4: The seismic stopper in the above technology cannot achieve the self-reset of the bridge beam body after an earthquake.

[0005] There are also existing inventions that use gravity-type blocks. Although the anti-seismic effect is improved compared to the traditional integral concrete blocks, there are still some problems. For example, in CN 213951911 U, only the sliding process of one side of the bridge beam is considered, and no careful consideration is given to how the other side of the bridge beam moves in the lateral direction under the action of an earthquake, that is, no consideration is given to how the beam as a whole can achieve energy consumption through movement. Although sliding devices are designed on both sides of the upper main beam in the above invention, no consideration is given to how the main beam itself moves horizontally and vertically on the swing support, and the main beam will damage the support and cause the support to become empty during movement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by the utility model is to solve the problem that the conventional block, due to its large rigidity, will cause partial damage to the block and the main beam when it collides with the main beam under the action of the lateral impact force of the earthquake, and even cause damage to the lower structure. Moreover, when the block is damaged, it is difficult to provide sufficient restoring force, which is easy to cause large residual deformation of the main beam, increase the difficulty of bridge repair, and even cause the serious problem of beam falling.

[0007] In order to solve the above technical problems, the technical solution of the utility model is: a gravity-type bridge combined seismic stopper, including a cap beam and a box beam erected on the upper end of the cap beam, the bottom of both sides of the box beam are fixedly provided with steel sliders with arc-shaped bottoms, and the two sides of the cap beam are symmetrically provided with slope block blocks for the sliding of the two steel sliders respectively, and the sliding slope sections of the slope block and the steel sliders are both in an arc shape inclined upward from the inside to the outside; two upper support pedestals are fixedly provided at intervals on the lower end surface of the box beam, and two lower support pedestals corresponding to the upper support pedestals and slidably connected to the upper end surface of the cap beam are fixedly provided on the upper end surface of the cap beam between the two lower support pedestals, and two lower auxiliary blocks are fixedly provided on the upper end surface of the cap beam between the two lower support pedestals, and the upper ends of the two lower auxiliary blocks are fixedly connected to the upper auxiliary blocks by high-strength shear bolts.

[0008] Furthermore, the upper support pedestal stone, the lower support pedestal stone, the upper auxiliary block and the lower auxiliary block are all arranged in a transverse interval, a pot-type rubber bearing is provided between the upper support pedestal stone and the lower support pedestal stone, and the lower end of the pot-type rubber bearing is fixedly connected to the lower support pedestal stone.

[0009] Furthermore, the upper auxiliary stopper is consistent in thickness with the upper support pad stone, and the lower auxiliary stopper is consistent in thickness with the lower support pad stone and the basin-type rubber support.

[0010] Furthermore, a plurality of rubber sliders are provided between the box beam and the cap beam. Four of the rubber sliders are arranged on the cap beam in a rectangular array and are staggered with the lower support shim and the lower auxiliary stopper. The rubber sliders are all fixedly connected to the cap beam.

[0011] Furthermore, a transverse block is fixedly provided on the top of the slope block, and the inner side of the transverse block is an inclined surface inclined upward toward the box beam to abut against the side end of the steel sliding block after sliding.

[0012] Furthermore, the upper end surface of the slope block is composed of a sliding slope and a flat surface fixed to the transverse block. The bottom end of the sliding slope is at the same level as the bottom end of the steel slider to facilitate docking. The sliding slope is covered with a layer of polyethylene gasket, and the arc surface at the lower end of the steel slider is covered with a layer of rubber gasket.

[0013] Furthermore, the lower auxiliary stopper is fixedly connected to the cap beam via embedded steel bars in the cap beam, and a plurality of vertically extending and elongated prestressed tendons are also connected between the lower auxiliary stopper and the upper auxiliary stopper.

[0014] Furthermore, the lower end of the cap beam is supported and fixed by piers.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the device can convert the direct rigid collision between the bridge block and the beam into the flexible sliding of the steel slider and the slope block, directly protecting the safety of the beam and the block structure. At the same time, it can fully and effectively dissipate the lateral kinetic energy input to the bridge by the earthquake by overcoming the gravity of the beam and overcoming the high friction between the steel slider at the bottom of the beam and the slope block. By designing a rubber slider between the box beam and the cap beam, and cooperating with the upper and lower auxiliary blocks and arc segments, the beam can be fully moved laterally and vertically while protecting the bridge bearings, thereby consuming more seismic energy. Specifically:

[0016] 1: This device can realize the vertical displacement of the beam body and realize the girder body gravity energy dissipation. 2: This device can ensure the safety of the support structure when the bridge undergoes vertical displacement. 3: This device can realize the self-reset function of the bridge beam body after the earthquake. Advantage 4: This device can avoid the direct rigid collision between the beam body and the block with a large destructive effect, and can protect the safety of the block and bridge components.

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 This is a top view schematic diagram of the embodiment of the utility model without the box beam;

[0020] Figure 3 This is a schematic diagram of the connection between the upper auxiliary stopper and the lower auxiliary stopper in the embodiment of the utility model;

[0021] Figure 4This is a force analysis diagram of the box girder when sliding in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the working state of the embodiment of the utility model when subjected to a common earthquake effect;

[0023] Figure 6 The figure is a schematic diagram of the working state of the embodiment of the utility model when it is subjected to a rare earthquake.

[0024] In the figure: 1-box girder, 2-cap beam, 3-column pier, 4-steel slider, 5-polyethylene gasket, 6-transverse block, 7-slope block, 8-upper support pedestal, 9-pot type rubber bearing, 10-lower support pedestal, 11-upper auxiliary block, 12-lower auxiliary block, 13-rubber slider, 14-rubber gasket, 15-sliding slope section, 16-flat surface, 101-high-strength shear bolts, 102-prestressed tendons, 103-embedded steel bars. DETAILED DESCRIPTION

[0025] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0026] like Figures 1 to 6 As shown, a gravity-type bridge combined seismic stopper comprises a cap beam and a box beam erected on the upper end of the cap beam, steel sliders with arc-shaped bottoms are fixedly arranged at the bottoms of both sides of the box beam, slope block blocks for sliding of the two steel sliders are symmetrically arranged on both sides of the cap beam, and the sliding slopes of the slope block and the steel sliders are both in the shape of arcs inclined upward from the inside to the outside; two upper support pedestals are fixedly arranged at intervals on the lower end surface of the box beam, and two lower support pedestals corresponding to the upper support pedestals and slidably connected to the upper end surface of the cap beam are fixedly arranged on the upper end surface of the cap beam, and two lower auxiliary blocks are fixedly arranged on the upper end surface of the cap beam between the two lower support pedestals, and the upper ends of the two lower auxiliary blocks are fixedly connected to the upper auxiliary blocks by high-strength shear bolts.

[0027] This device directly sets four rubber sliders on the upper box beam and the lower cap beam to allow the box beam to slide horizontally and vertically, and the height of the sliders just fills the gap between the upper and lower beams. Therefore, when the box beam drives the upper support pad stone to slide, the support is in contact but not squeezed and stressed, ensuring the safety and durability of the support structure.

[0028] In an embodiment of the utility model, the upper support pedestal stone, the lower support pedestal stone, the upper auxiliary block and the lower auxiliary block are all arranged laterally at intervals, a basin-type rubber bearing is provided between the upper support pedestal stone and the lower support pedestal stone, and the lower end of the basin-type rubber bearing is fixedly connected to the lower support pedestal stone.

[0029] In the embodiment of the utility model, the thickness of the upper auxiliary stopper is consistent with that of the upper support pad stone, and the thickness of the lower auxiliary stopper is consistent with that of the lower support pad stone and the basin-type rubber support.

[0030] In the embodiment of the utility model, a plurality of rubber sliders are provided between the box beam and the cap beam. Four rubber sliders are provided on the cap beam in a rectangular array and are staggered with the lower support pad and the lower auxiliary block. The rubber sliders are all fixedly connected to the cap beam. Since four rubber sliders are provided between the box beam and the cap beam, the problem of the beam body sliding directly on the support is eliminated, and one end of the upper box beam can slide freely along the sliding slope section, and the other end can slide on the rubber slider, so that vertical displacement can be easily achieved without causing the problem of the beam body and the support being detached.

[0031] In the embodiment of the utility model, a transverse block is fixedly provided on the top of the slope block, and the inner side of the transverse block is an inclined surface inclined upward toward the box beam to abut against the side end of the steel sliding block after sliding.

[0032] In the embodiment of the utility model, the upper end surface of the slope block is composed of a sliding slope and a flat surface fixed to the transverse block. The bottom end of the sliding slope is at the same level as the bottom end of the steel slider to facilitate docking. The sliding slope is covered with a layer of polyethylene gasket, and the arc surface of the lower end of the steel slider is covered with a layer of rubber gasket. A layer of rubber gasket is set at the bottom of the steel slider at the lower part of the box beam, and a layer of polyethylene pad is set on the arc ramp of the block. Both materials have extremely high wear resistance and anti-slip properties. When the two are in contact, they can be squeezed and deformed to relieve the lateral kinetic energy of the beam body. And because the curvature of the slider is the same as the curvature of the ramp, the sliding of the beam body can be better achieved.

[0033] In an embodiment of the utility model, the lower auxiliary block is fixedly connected to the cap beam via embedded steel bars in the cap beam, and a plurality of vertically extending and elongated prestressed tendons are also connected between the lower auxiliary block and the upper auxiliary block.

[0034] In an embodiment of the utility model, the lower end of the cap beam is supported and fixed by piers.

[0035] The embodiment of the utility model includes the following states when working:

[0036] 1. Normal use status

[0037] like Figure 1 As shown, when in normal use, the bridge falls stably on the supports and rubber sliders due to the deadweight of the box girder, and no lateral movement or deviation occurs.

[0038] 2. When a Frequent Earthquake Happens

[0039] like Figure 5As shown, when the bridge is subjected to the action of a common earthquake, the upper box girder 1 of the bridge will move laterally under the action of the lateral force of the earthquake. Since the steel upper support pedestal 8 is fixed to the lower part of the box girder, the lateral movement of the box girder will drive the steel upper support pedestal to move. After the lateral displacement occurs, the upper support pedestal 8 will contact and collide with the upper auxiliary block 11, and the upper auxiliary block 11 is connected to the lower auxiliary block 12 through the shear pin 101 and the elongated tensile prestressed steel bar, and the lateral kinetic energy of the earthquake is dissipated through the shear resistance of the pin and the tensile resistance of the steel bar. The steel slider 4 eventually contacts the sliding slope section 5 of the uphill section block 7 but will not rush. In this process, the anti-falling beam function of the block is fully utilized mainly through the friction energy consumption of the relative movement between the box girder itself and the rubber slider material and the restriction of the box girder movement by the auxiliary block.

[0040] 3. When a rare earthquake occurs

[0041] like Figure 6 As shown, when the bridge is subjected to a rare earthquake, the anti-shear bolts 101 and the elongated tensile prestressed tendons 102 arranged between the upper auxiliary block 11 and the lower auxiliary block 12 will be sheared and pulled out respectively under the collision of the upper box beam 1 and the upper support pad 8, so the upper main beam will break through the restriction of the upper auxiliary block and slide freely on the slope block on both sides. During the sliding process, on the one hand, the box beam itself will generate sliding friction relative to the rubber slider 13 arranged at the bottom; on the other hand, the rubber gasket arranged at the bottom of the steel slider 4 will fully contact and rub with the polyethylene material pad 5 on the surface of the sliding slope 7, and fully dissipate the energy input by the earthquake during the friction process. When the upper box beam 1 overcomes its own gravity and reaches the highest point of the sliding slope, it will contact and collide with the high-toughness concrete transverse block 6 arranged at the top of the slope. At this time, the input seismic capacity will be fully dissipated by a series of energy dissipation means, including the collision energy of the upper support pad, the friction energy during the sliding process, the energy consumption of overcoming gravity and the final collision energy of the transverse block.

[0042] The upper box girder that eventually dissipates energy will slowly slide down the slope block under the action of its own gravity. In this process, friction energy is consumed again. The beam body finally stops moving under the resistance of the upper auxiliary block 8 to achieve a partial self-reset function. The upper beam body can be reset by only a few positioning means. The upper auxiliary block 8 damaged by the collision is recast and replaced. The rubber gasket and polyethylene pad of the slider that has been squeezed and deformed can also be repaired or replaced as appropriate, so as to quickly repair the bridge function.

[0043] The utility model is not limited to the above-mentioned best implementation mode. Anyone can derive other various forms of gravity bridge combination anti-seismic blocks under the inspiration of the utility model. All equivalent changes and modifications made according to the scope of the patent application of the utility model shall fall within the scope of the utility model.

Claims

1. A gravity bridge combined seismic stopper, characterized in that: It includes a cap beam, a box beam erected on the upper end of the cap beam, and a pier supported on the lower end of the cap beam. The bottom of both sides of the box beam are fixedly provided with steel sliders with arc-shaped bottoms. The two sides of the cap beam are symmetrically provided with slope block blocks for sliding of the two steel sliders respectively. The sliding slope of the slope block and the steel slider are both in the shape of an arc surface inclined upward from the inside to the outside; two upper support shims are fixedly provided at intervals on the lower end surface of the box beam, and two lower support shims are fixedly provided on the upper end surface of the cap beam, which correspond to the upper support shims one by one and are slidably connected. Two lower auxiliary blocks are fixedly provided on the upper end surface of the cap beam between the two lower support shims, and the upper ends of the two lower auxiliary blocks are fixedly connected to the upper auxiliary blocks by high-strength shear bolts.

2. The gravity-type bridge combined anti-seismic stopper according to claim 1, characterized in that: The upper support pedestal stone, the lower support pedestal stone, the upper auxiliary stopper and the lower auxiliary stopper are all arranged at intervals in the transverse direction. A pot-type rubber bearing is arranged between the upper support pedestal stone and the lower support pedestal stone. The lower end of the pot-type rubber bearing is fixedly connected to the lower support pedestal stone.

3. The gravity-type bridge combined anti-seismic stopper according to claim 2, characterized in that: The upper auxiliary stopper is consistent in thickness with the upper support pad stone, and the lower auxiliary stopper is consistent in thickness with the lower support pad stone and the basin-type rubber support.

4. The gravity-type bridge combined anti-seismic stopper according to claim 1, characterized in that: A plurality of rubber sliders are also provided between the box beam and the cap beam. The rubber sliders are arranged on the cap beam in a rectangular array and are staggered with the lower support pad stone and the lower auxiliary stopper. The rubber sliders are all fixedly connected to the cap beam.

5. The gravity-type bridge combined anti-seismic stopper according to claim 1, characterized in that: A transverse block is fixedly arranged on the top of the slope block, and the inner side of the transverse block is an inclined surface inclined upward toward the box beam to abut against the side end of the steel sliding block after sliding.

6. The gravity-type bridge combined anti-seismic stopper according to claim 5, characterized in that: The upper end surface of the slope section block is composed of a sliding slope section and a flat surface fixed to the transverse stopper. The bottom end of the sliding slope section is at the same level as the bottom end of the steel slider to facilitate docking. The sliding slope section is covered with a layer of polyethylene gasket, and the arc surface at the lower end of the steel slider is covered with a layer of rubber gasket.

7. The gravity-type bridge combined anti-seismic stopper according to claim 1, characterized in that: The lower auxiliary stopper is fixedly connected to the cap beam via pre-buried steel bars in the cap beam, and a plurality of prestressed tendons are also connected between the lower auxiliary stopper and the upper auxiliary stopper.

8. The gravity-type bridge combined anti-seismic stopper according to claim 1, characterized in that: The lower end of the cap beam is supported and fixed by piers.

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