CN210797239U

CN210797239U - Bridge anti-seismic device provided with rotary meshed stop blocks

Info

Publication number: CN210797239U
Application number: CN201921529615.8U
Authority: CN
Inventors: 廖平; 朱海峰; 张秀成; 黄耀龙; 屈兵
Original assignee: Putian University
Current assignee: Putian University
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-06-19
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a bridge anti-seismic device with a rotary occlusion type stop block, which comprises two brackets which are respectively arranged at the two ends of a bent cap and have the same structure; a rotary snap-in stop block is arranged on the bracket; the rotary occlusion type stop block comprises a fixed shaft fixedly arranged at the upper end of the bracket; a sleeve is sleeved outside the fixed shaft; a fixing plate with the same structure is fixedly arranged outside each sleeve; one side of the fixing plate, which is far away from the sleeve, is provided with an arc-shaped contact part, and a spring is arranged between the adjacent contact parts; the inner curved surface of the curved surface baffle is provided with arc-shaped grooves which are matched with the contact parts one by one; the lower part of the curved baffle is provided with a connecting plate; the connecting plate is in contact connection with the vertical plate of the L-shaped supporting plate, and the other side of the flat plate of the supporting plate is fixed with the main beam; the utility model discloses collect dissipation seismic energy, limit function and reset function in an organic whole, required material cost is lower relatively, and the part is easily changed, and processing is simple, and whole device and bridge structures's the back maintenance reinforcement cost of shaking is showing and is reducing.

Description

Bridge anti-seismic device provided with rotary meshed stop blocks

Technical Field

The utility model relates to a bridge antidetonation and subtract technical field of shock insulation, concretely relates to be provided with bridge anti-seismic device of rotatory interlock formula dog.

Background

In recent decades, the anti-collision and anti-falling device is used as an important measure for seismic isolation and reduction of a bridge structure, particularly a bridge anti-seismic stop block and a buffering energy consumption device thereof, and the accidents of longitudinal and transverse beam falling of the bridge structure are effectively reduced. Along with the gradual deepening of people to bridge structure earthquake disaster understanding, in order to effectively resist the too big lateral displacement that the bridge structure produced under the earthquake effect, need set up reasonable shock attenuation isolation bearing and limit stop in positions such as bent cap. However, beam falling accidents caused by earthquake action still occur at times, and certain difficulty is added to the maintenance and reinforcement of the bridge structure in earthquake. The phenomenon is caused by unreasonable transverse limiting measures to a great extent.

The earthquake action not only easily causes the serious damage of piers, foundations and the like, but also easily causes the damage of earthquake-resistant stop blocks and supports, and can be observed frequently in earthquake disaster data in the past year. The overlarge transverse seismic displacement of the bridge structure may exceed the maximum displacement of the support on one hand, and on the other hand, the limit stop of the bridge structure is also damaged by the collision of the main beam. The existing bridge anti-seismic stop block mainly depends on deformation and damage of self materials or parts to dissipate seismic energy under the action of an earthquake, the replacement operability is not strong after partial components or parts are damaged, the manufacturing and processing requirements are high, the cost is high, and the space required by installation and layout is large.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem to prior art existence provides a collection dissipation seismic energy, limit function and reset function in the bridge anti-seismic device that is provided with rotatory interlock formula dog of an organic whole.

The utility model adopts the technical proposal that: a bridge anti-seismic device provided with a rotary meshed stop block comprises two brackets which are arranged at two ends of a bent cap respectively and have the same structure; a rotary snap-in stop block is arranged on the bracket; the rotary occlusion type stop block comprises a fixed shaft fixedly arranged at the upper end of the bracket; 2n +1 sleeves with the same outer diameter are sleeved outside the fixed shaft, and n is a natural number more than or equal to 1; the (n + 1) th sleeve outside the fixed shaft is fixed with the outer surface of the fixed shaft; a fixing plate with the same structure is fixedly arranged outside each sleeve; one side of the fixing plate, which is far away from the sleeve, is provided with an arc-shaped contact part, and a spring is arranged between the adjacent contact parts; the inner curved surface of the curved surface baffle is provided with arc-shaped grooves which are matched with the contact parts one by one; the lower part of the curved baffle is provided with a connecting plate; the connecting plate is connected with the vertical plate of the L-shaped supporting plate in a contact manner, and the other side of the flat plate of the supporting plate is fixed with the main beam.

Further, the support is T type support, including burying embedded plate and the vertical board of burying underground on the bent cap.

Furthermore, the upper end of the vertical plate is provided with grooves corresponding to the sleeves one by one.

Furthermore, the connecting plate is a curved plate, and the lower end of the inner curved surface of the connecting plate is fixedly connected with the lower end of the outer curved surface of the curved baffle; the upper end of the outer curved surface of the connecting plate is contacted with the upper end of the supporting plate.

Further, the girder lower extreme sets up pre-buried steel sheet, and backup pad one side is fixed with pre-buried steel sheet.

Further, the contact part is a circular steel bar, and the diameter of the circular steel bar is 3-5 mm smaller than that of the arc-shaped groove in the curved baffle.

Furthermore, the contact side of the support plate and the connecting plate is of an arc-shaped structure, and the arc radius of the arc-shaped structure is matched with the radian of the connecting plate.

The utility model has the advantages that:

(1) the middle sleeve, the fixed plate, the round steel bar, the curved baffle and the connecting plate of the utility model jointly form an energy consumption and reset system, thereby realizing the effect of integrating the functions of dissipating seismic energy, limiting and resetting;

(2) the utility model has the advantages of clear force transmission path and energy consumption mechanism, small layout space requirement, relatively low cost of required materials, easy replacement of parts, simple processing, and remarkably reduced maintenance and reinforcement cost after the earthquake of the whole device and the bridge structure;

(3) under the normal use load and the action of medium and small earthquakes, the main beam generates transverse earthquake displacement; at the moment, the main beam drives the supporting plate to move towards one side of the curved baffle; in the process, the curved surface baffle rotates around the fixed shaft and moves along the circular steel bar at the middle position along with the increase of the transverse seismic displacement, and the lower side spring is gradually compressed; under the action of strong shock, the transverse seismic displacement of the main beam is remarkably increased, the curved baffle is in contact occlusion transition with the circular steel bar at the top due to the contact occlusion of the middle circular steel bar, the spring at the upper side is compressed at the moment, and the seismic energy is dissipated mainly by pulling and lifting the spring at the upper side and overcoming the gravity of the curved baffle and the connecting plate; under the action of rare earthquakes, the bracket is used for dissipating earthquake energy to avoid falling of the beam; when the earthquake displacement is gradually reduced, the main beam, the support plate, the curved baffle and the connecting plate can move in the opposite direction along the original path; the functions of automatic reset and multiple fortification are realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic plan view of the fixing shaft and the sleeve of fig. 1.

Fig. 3 is a schematic diagram of a vertical plate structure in the bracket in fig. 1.

Fig. 4 is a schematic view of the structure of the support plate of fig. 1.

Fig. 5 is a schematic structural view of the sleeve, the fixing plate and the round steel bar in fig. 1 and their connection planes.

Fig. 6 is a schematic view of the curved baffle of fig. 1 in an elevational view toward the main beam.

In the figure: 1-capping beam, 2-main beam, 3-support, 4-embedded plate, 5-vertical plate, 6-sleeve, 7-fixed plate, 8-contact part, 9-spring, 10-embedded steel plate, 11-support plate, 12-curved baffle, 13-connecting plate and 14-fixed shaft.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in the figure, the bridge anti-seismic device provided with the rotary engagement type stop block comprises two brackets which are arranged at two ends of a bent cap 1 respectively and have the same structure; a rotary snap-in stop block is arranged on the bracket; the rotary snap-in type stopper comprises a fixed shaft 14 fixedly arranged at the upper end of the bracket; 2n +1 sleeves 6 with the same outer diameter are sleeved outside the fixed shaft 14, and n is a natural number more than or equal to 1; the (n + 1) th sleeve 6 outside the fixed shaft 14 is fixed with the outer surface of the fixed shaft 14; a fixing plate 7 with the same structure is fixedly arranged outside each sleeve 6; one side of the fixing plate 7, which is far away from the sleeve 6, is provided with a circular arc-shaped contact part 8, and a spring 9 is arranged between the adjacent contact parts 8; a curved baffle 12 is also arranged, and the inner curved surface of the curved baffle 12 is provided with arc-shaped grooves which are matched with the contact parts 8 one by one; the lower part of the curved baffle 12 is provided with a connecting plate 13; the connecting plate 13 is connected with the vertical plate of the L-shaped supporting plate 11 in a contact manner, and the other side of the straight plate of the supporting plate 11 is fixed with the main beam 2.

The support is a T-shaped support and comprises an embedded plate 4 and a vertical plate 5 which are embedded in the bent cap 1; a main beam 2 is supposed on the bent cap 1 to support on a support 3, and the support 3 is a basin-shaped support. The support is a T-shaped steel component, and pre-embedded plates 4 in the T-shaped steel component are pre-embedded at two ends of the bent cap 1; the upper end of the vertical plate 5 is provided with grooves corresponding to the sleeves 6 one by one, in the example, n =1, and 3 sleeves 6 are arranged; the sleeve 6 is a thick-wall steel pipe, the sleeve positioned in the middle is firmly welded with the fixed shaft 7, and two ends of the fixed shaft 7 are fixed with the upper end of the vertical plate 5. The end part of the sleeve 6 is welded with a fixing plate 8 of a round steel bar, and the fixing plate 8 is a straight steel plate. A plurality of springs 9 are arranged between the adjacent round steel bars. The lower end of the main beam 2 and the corresponding positions of the two ends of the bent cap 1 are respectively provided with an embedded steel plate 10. An L-shaped support plate 11 with one end polished into an arc shape is welded and fixed on the embedded steel plate 10, and the arc radius of the L-shaped support plate is matched with the radian of the connecting plate 13. The curved baffle 12 and the connecting plate 13 are welded and fixed to form a rotating steel block; the upper end of the outer curved surface of the connecting plate 13 in the rotary steel block is contacted with the upper end of the supporting plate 11 and is supported at the arc-shaped end of the L-shaped steel plate. The curved surface baffle 12 inner curved surface is provided with the arc recess, and the recess side is in the same place with the circular rod iron interlock of downside.

The groove at the upper end of the T-shaped support is pulse-shaped, and the depth of the vertical plate 5 to be cut is 1-2 cm larger than the outer diameter of the sleeve 6, so that the situation that the rotating steel block is limited when the fixing plate 8 and the sleeve 6 are driven upwards to rotate is avoided. The width of the vertical plate 5 in the T-shaped steel component which is cut is 2-3 times of the cutting depth of the vertical plate to ensure that the sleeve 6 is reliably connected with the fixing plate 7. The radius of the round steel bar is 3-5 mm smaller than that of the arc-shaped groove in the curved baffle 12. The size of the arc-shaped groove in the inner curved surface of the curved surface baffle 12 along the length direction of the main beam 1 is 1-2 cm larger than that of the round steel bar.

When the bridge is used, according to the design requirements of seismic resistance and seismic isolation and reduction of a bridge structure, the vertical plate 5, the embedded plate 4, the circular steel bar, the sleeve 6, the fixed plate 7, the embedded steel plate 10, the L-shaped support plate 11 and the curved surface baffle 12 which are required by the T-shaped steel component are welded and processed according to the required geometric dimension. When the bent cap 1 is in pouring construction, pre-buried plates 4 in the T-shaped steel component are pre-buried at two ends of the bent cap 1, and pre-buried steel plates 10 are fixed at the lower ends of two sides of the main beam 2. The sleeve 6 is arranged on the fixed shaft 14 in a penetrating way and is welded and fixed with the vertical plate 5 according to the design. Meanwhile, a small steel plate is welded at two ends of the fixed shaft 14 so as to prevent the small steel plate from falling off during rotation. The fixed plate 7, the fixed shaft 14 are then fixed by welding to the sleeve 6, while a certain number of springs 9 are fixed to the round steel bar as required in the figure. A supporting plate 11 is welded and fixed on an embedded steel plate 10 on a main beam, a curved surface baffle plate 12 and a connecting plate 13 are welded to form a rotary steel block, and the rotary steel block is arranged according to the position in the figure, so that a rotary meshed stop block is formed.

Under the normal use load effect, the bridge structures girder 2 lateral displacement is less relatively, and the backup pad 11 of L shape moves to rotatory steel billet side and drives rotatory steel billet and produces less rotary displacement around the circular rod iron of downside most this moment.

Under the action of a medium or small earthquake, the transverse earthquake displacement generated by the main beam 2 drives the L-shaped supporting plate 11 welded and fixed on the embedded steel plate 10 to rotate relative to the steel block to move to one side. In the process, the rotating steel block rotates around the fixed shaft 14 and will move along the circular steel bar in the middle position with the increase of the transverse earthquake displacement, and the lower spring 9 is gradually compressed. The process mainly depends on compressing the lower spring 9 and overcoming the gravity of the rotating steel block to do work to dissipate the seismic energy.

Under the strong shock effect, the horizontal seismic displacement of bridge structure girder 2 will show the increase, rotatory steel block by with the circular rod iron contact interlock in middle to with the circular rod iron contact interlock transition of the top, the spring 9 of upside is compressed this moment. In the process, the upper spring 9 is stretched and the gravity of the rotating steel block is overcome to do work to dissipate the seismic energy.

Under the action of rare earthquakes, the bridge structure limits the overlarge transverse earthquake displacement of the main beam 2 by the aid of the T-shaped steel members anchored on the cover beams 1.

The utility model discloses structure and equipment are simple, multiple defences, the power consumption mechanism is clear and definite effective, and the construction is simple and convenient, the cost is lower, through reasonable computational analysis and limited experiment alright obtain better scheme. Thereby realize controlling bridge structures girder 2 too big lateral seismic displacement by stage in order to finally to reach the purpose that improves bridge structures shock resistance.

Claims

1. A bridge anti-seismic device provided with a rotary meshed stop block is characterized by comprising two brackets which are arranged at two ends of a bent cap (1) respectively and have the same structure; a rotary snap-in stop block is arranged on the bracket; the rotary snap-in type stop block comprises a fixed shaft (14) fixedly arranged at the upper end of the bracket; 2n +1 sleeves (6) with the same outer diameter are sleeved outside the fixed shaft (14), and n is a natural number more than or equal to 1; the (n + 1) th sleeve (6) outside the fixed shaft (14) is fixed with the outer surface of the fixed shaft (14); a fixing plate (7) with the same structure is fixedly arranged outside each sleeve (6); one side of the fixing plate (7) far away from the sleeve (6) is provided with a circular arc-shaped contact part (8), and a spring (9) is arranged between the adjacent contact parts (8); the curved surface baffle (12) is also arranged, and the inner curved surface of the curved surface baffle (12) is provided with arc-shaped grooves which are matched with the contact parts (8) one by one; the lower part of the curved baffle (12) is provided with a connecting plate (13); the connecting plate (13) is in contact connection with the vertical plate of the L-shaped supporting plate (11), and the other side of the straight plate of the supporting plate (11) is fixed with the main beam (2).

2. A bridge seismic device provided with rotating snap-in blocks, according to claim 1, characterized in that said bracket is a T-shaped bracket comprising pre-embedded plates (4) and vertical plates (5) embedded on the capping beam (1).

3. A bridge anti-seismic device provided with rotary engagement type stoppers according to claim 2, characterized in that the upper ends of the vertical plates (5) are provided with grooves corresponding to the sleeves (6) one by one.

4. The anti-seismic device for bridges provided with the rotary engagement type stop blocks according to claim 1, wherein the connecting plate (13) is a curved plate, and the lower end of the inner curved surface of the connecting plate is fixedly connected with the lower end of the outer curved surface of the curved baffle (12); the upper end of the outer curved surface of the connecting plate (13) is contacted with the upper end of the supporting plate (11).

5. The anti-seismic device for the bridge with the rotary engagement type stop block according to claim 1, wherein the lower end of the main beam (2) is provided with an embedded steel plate (10), and one side of the support plate (11) is fixed with the support plate (11).

6. The anti-seismic device for bridges provided with the rotary engagement type stop blocks according to claim 1, wherein the contact part (8) is a circular steel bar, and the diameter of the circular steel bar is 3-5 mm smaller than that of the arc-shaped groove on the curved surface baffle (12).

7. A bridge anti-seismic device with rotary engagement type stop blocks according to claim 4, characterized in that the contact side of the support plate (11) and the connecting plate (13) is of an arc-shaped structure, and the arc radius of the arc-shaped structure is matched with the radian of the connecting plate (13).