CN211200034U

CN211200034U - Bridge anti-seismic device provided with hill type flexible stop blocks

Info

Publication number: CN211200034U
Application number: CN201921528462.5U
Authority: CN
Inventors: 廖平; 屈兵; 黄耀龙; 张秀成; 朱海峰
Original assignee: Putian University
Current assignee: Putian University
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-08-07
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a bridge anti-seismic device provided with a hill type flexible stop block, which comprises two U-shaped flexible stop blocks which are respectively arranged at the two ends of a bent cap and have the same structure; a U-shaped rigid baffle block is arranged in the flexible baffle block, and a rigid cover plate is arranged at the inner upper part of the rigid baffle block; a plurality of springs are arranged in the rigid check block, one end of each spring is connected with the inner wall of the rigid check block, and the other end of each spring is connected with a rigid cover plate of the rigid check block; the utility model discloses can effectively cushion and resist the earthquake effect and reduce the roof beam accident that falls, can with a plurality of functions reasonable integration such as spacing, buffering power consumption and reset, have the multichannel defence line, it is easy to reset after the shake.

Description

Bridge anti-seismic device provided with hill type flexible stop blocks

Technical Field

The utility model relates to a bridge is combatted earthquake and is subtracted shock insulation technical field, concretely relates to bridge anti-seismic device who is provided with the flexible dog of hillock formula.

Background

According to earthquake disaster data of the past year, beam falling accidents caused by the fact that longitudinal and transverse limiting measures are not in place often occur to bridge structures. The beam falling accident not only brings great difficulty to the post-earthquake maintenance of the bridge structure, but also produces serious interference to traffic lines below the bridge. Along with the continuous deepening of people to earthquake disasters and structural earthquake responses, structural earthquake resistance and related seismic mitigation and isolation measures are also more and more emphasized in the structural design and construction process. The effective seismic isolation and reduction device is a hot point in the field of seismic isolation and reduction of civil engineering.

In order to avoid the beam falling accident, anti-seismic stop blocks are often arranged at the two ends of the bent cap or some buffering energy consumption limiting devices are adopted. The existing bridge limiting device is single in function, multiple beneficial functions cannot be integrated beneficially, the cost is high, the required space for arrangement is large, the structure is heavy, parts are not easy to replace and maintain after being damaged, and the manufacturing and processing difficulty is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can effectively cushion and resist earthquake effect and reduce the roof beam accident that falls, can with spacing, buffering power consumption and a plurality of functions reasonable integration such as reseing, have the multichannel line of defence, the bridge anti-seismic device who is provided with the flexible dog of hillock formula that resets after the shake.

The utility model adopts the technical proposal that the bridge anti-seismic device provided with the hill type flexible stop blocks comprises two U-shaped flexible stop blocks which are respectively arranged at the two ends of the bent cap and have the same structure; a U-shaped rigid baffle block is arranged in the flexible baffle block, and a rigid cover plate is arranged at the upper end in the upper part of the rigid baffle block; a plurality of springs are arranged in the rigid check block, one end of each spring is connected with the inner wall of the rigid check block, and the other end of each spring is connected with the rigid cover plate of the rigid check block.

Furthermore, the flexible stopper is a hollow closed structure, and liquid or gas is filled in the flexible stopper.

Further, the flexible stopper is made of elastic rubber.

Furthermore, a rectangular groove is reserved in the position, corresponding to the flexible stop block, of the cover beam.

Furthermore, two sides of the lower end of the main beam are provided with a vertical steel plate, and a U-shaped steel plate is arranged at the position, corresponding to the vertical steel plate, on the bent cap; an oblique steel plate is arranged between the vertical steel plate and the U-shaped steel plate.

Furthermore, the contact part of the outer side of the U-shaped rigid baffle block and the U-shaped flexible baffle block is arc-shaped.

Furthermore, the U-shaped steel plate is formed by respectively bending two ends of a flat steel plate upwards; the included angle between the upward part and the horizontal section part is 120-150 degrees.

Furthermore, a liquid filling opening is formed in the bottom of the flexible stop block, and a through hole is formed in the corresponding position of the rigid stop block and the rigid cover plate.

The utility model has the advantages that:

(1) the utility model can effectively buffer and resist the earthquake action and reduce the beam falling accidents, reasonably integrates a plurality of functions of limiting, buffering energy consumption, resetting and the like, has a plurality of defense lines, and is simple to reset after the earthquake;

(2) the utility model has low requirement on manufacturing and processing precision, short construction period, easy replacement and maintenance of parts and lower cost;

(3) under the action of normal use load and medium and small earthquakes, the utility model mainly depends on the bulge of the U-shaped flexible stop block at the side of the compressed main beam to ensure that the bulge is expanded by the end part of the bent cap and the contact surface of the part rubs to buffer and dissipate the earthquake energy; under the action of strong shock, the earthquake energy is buffered and dissipated mainly by the friction between the protruding part of the U-shaped flexible stop block at the end of the compressed cover beam and the contact surface of the part, so that the displacement of the main beam is limited by multiple fortifications, and the beam falling accidents are avoided or reduced.

Drawings

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

Fig. 2 is the structural schematic diagram of the U-shaped flexible stop of the present invention.

Fig. 3 is a schematic view of the planar structure of the U-shaped rigid stop of the present invention.

Fig. 4 is a schematic view of the plane structure of the U-shaped steel plate of the present invention.

In the figure: the method comprises the following steps of 1-capping beam, 2-main beam, 3-support, 4-vertical steel plate, 5-oblique steel plate, 6-U-shaped steel plate, 7-rigid stop block, 8-flexible stop block, 9-filler and 10-liquid filling opening.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, 2, 3 and 4, a support 3 is installed on a bent cap 1, a main beam 2 is arranged on the support 3, and rectangular structural grooves are reserved at two ends of the bent cap 1 during construction and pouring. A U-shaped steel box type rigid stop dog 7 formed by welding is arranged on the middle straight section in the U-shaped flexible stop dog 8, and a rigid cover plate is arranged on the inner part and the upper part of the rigid stop dog 7. A plurality of springs are arranged in the rigid stop block 7, one ends of the springs are anchored on the inner wall of the rigid stop block 7, and the other ends of the springs are connected with a rigid cover plate.

The flexible block 8 is a U-shaped elastic rubber sealed cabin with a filling opening 10, and the filler 9 in the flexible block can be liquid or gas with low compressibility; rectangular grooves are reserved when two ends of the bent cap 1 are constructed and poured, and the flexible stop blocks 8 are installed and fixed in the rectangular grooves. Two sides of the lower end of the main beam 2 are provided with a vertical steel plate 5, and a U-shaped steel plate 6 is arranged on the bent cap 1 at a position corresponding to the vertical steel plate 4; an oblique steel plate 5 is arranged between the vertical steel plate 5 and the U-shaped steel plate 6. The U-shaped steel plate 6 is formed by bending two ends of a straight steel plate with a certain size upwards by 5-10 cm respectively, and the included angle between the bent part and the straight part is about 120-150 degrees.

Two filling openings 10 are arranged in the middle of the middle straight section in the flexible stop 8. Through holes are arranged at the positions of the rigid stop 7 and the rigid cover plate corresponding to the liquid filling opening 10. The diameter of the through hole is 2-3 cm larger than that of the liquid filling opening 10. The reserved rectangular groove is 1-2 cm longer than the corresponding edge of the flexible stop block, and the hole between the rectangular groove and the flexible stop block 8 is filled after liquid is added into the flexible stop block 8. The edges and corners of the contact part of the outer side of the rigid stop block 7 and the flexible stop block 8 are polished to be circular arc, so that damage to the flexible stop block 8 caused by contact and friction of the flexible stop block is avoided. U shaped steel 6 is close to 8 tip cutting polishing circular-archs of flexible dog, causes destruction when avoiding flexible dog 8 and U shaped steel 6 contacts and rubs.

When the flexible check block is used, the flexible check block 8 with the liquid filling port 10 and the spring are manufactured and processed in advance according to the anti-seismic design requirement of a bridge structure. The rigid stop dog 7, the oblique steel plate 5, the U-shaped steel plate 6, the vertical steel plate 4 and the rigid cover plate are cut and processed as required. Rectangular grooves are reserved at corresponding positions when concrete of the bent cap 1 is poured, flexible stop blocks 8 formed by U-shaped elastic rubber sealed cabins are placed in the rectangular grooves, and rigid stop blocks 7 are installed. The rigid cover plate is then fixed inside the rigid block 7 by means of springs. Meanwhile, the oblique steel plate 5 is anchored on the embedded vertical steel plate 4 in a welding mode. A previously processed U-shaped steel plate 6 is welded to the end thereof. And finally, injecting liquid with low compressibility such as water and the like into the flexible stop 8 through the liquid filling port 10, and completely sealing the liquid, so that the hill liquid-filled flexible bridge anti-seismic stop is formed. The gas with low compressibility can be adopted, and the adopted U-shaped rigid stop 7, U-shaped steel plate 6 and spring can also adopt other structures which can play the same role.

Under the normal use load effect, the U-shaped steel plate 6 is also less in the displacement volume that produces under the drive of 2 horizontal seismic displacement of girder, and U-shaped steel plate 6 is not contacted with flexible dog 8 basically and produces the rolling effect this moment.

Under the action of a medium or small earthquake, the transverse earthquake displacement generated by the main beam 2 is increased to a certain extent compared with that under the action of normal use load, and at the moment, the U-shaped steel plate 6 rolls the convex part of the flexible stop 8 close to the main beam 2 side and reduces the volume of the flexible stop 8. But results in an increase in the volume of the U-shaped elastomeric capsule bulge at the end of the capping beam 1. Meanwhile, a rigid cover plate anchored by a compression spring in the rigid stop block 7 gradually moves towards the outer side of the rigid stop block 7 to lock the convex part of the U-shaped elastic rubber sealed cabin close to the main beam 2 side so as to prevent the convex part from restoring the original shape. This is as if a hill were moved by the U-shaped steel plate to the end of the capping beam 1 to form a larger hill. The friction between the steel plate and the rubber outside the sealed cabin and the compression and expansion deformation of the convex part of the U-shaped elastic rubber sealed cabin are mainly used for buffering the earthquake action and dissipating the earthquake energy in the stage.

Under the action of strong shock, the transverse seismic displacement generated by the main beam 2 of the bridge structure is large, and the U-shaped steel plate 6 is driven by the main beam 2 to contact or collide with the protruding part of the U-shaped elastic rubber sealed cabin close to the end part of the cover beam 1, and simultaneously, the protruding part of the U-shaped elastic rubber sealed cabin is rolled to dissipate seismic energy.

The utility model discloses a multiple defense theory, pass the power route and make clear and definite effectively, the consumptive material is less, the cost is lower, through reasonable computational analysis and limited experiment alright realize the earthquake demand of different bridge sites department, obtain better scheme to realize buffering power consumption, horizontal spacing, from multiple functions such as reset, and reduce the emergence of the roof beam accident and promote the holistic shock resistance of bridge structures. The utility model discloses the material that adopts in the preparation course of working belongs to conventional type, also easily acquires in engineering construction, and it is comparatively convenient that the part is changed, and the replenishment is also comparatively easy to airtight cabin liquid change, can adopt liquid such as water to fill, and then required cost is lower relatively, lays the demand space and satisfies relatively easily on the bent cap, consequently has better marketing application prospect.

Claims

1. A bridge anti-seismic device provided with a hill type flexible stop block is characterized by comprising two U-shaped flexible stop blocks (8) which are arranged at two ends of a bent cap (1) respectively and have the same structure; a U-shaped rigid stop block (7) is arranged in the flexible stop block (8), and a rigid cover plate is arranged on the inner upper part of the rigid stop block (7); a plurality of springs are arranged in the rigid stop block (7), one end of each spring is connected with the inner wall of the rigid stop block (7), and the other end of each spring is connected with a rigid cover plate of the rigid stop block (7).

2. An anti-seismic device for bridges provided with flexible hilly stoppers according to claim 1, characterized in that said flexible stoppers (8) are hollow and closed structures, the interior of which is filled with liquid or gas.

3. A bridge seismic device provided with hill-like flexible stops according to claim 2, characterized in that said flexible stops (8) are made of elastic rubber.

4. An earthquake-resistant device for bridges provided with hill-like flexible blocks as claimed in claim 1, wherein rectangular grooves are reserved on the bent cap (1) at positions corresponding to the flexible blocks (8).

5. The bridge anti-seismic device provided with the hill type flexible stop blocks is characterized in that two sides of the lower end of a main beam (2) on the bent cap (1) are provided with a vertical steel plate (4), and a U-shaped steel plate (6) is arranged at the corresponding position of the vertical steel plate (4) on the bent cap (1); an oblique steel plate (5) is arranged between the vertical steel plate (4) and the U-shaped steel plate (6).

6. A bridge earthquake-proof device provided with hill-type flexible stoppers according to claim 1, wherein the contact part of the outer side of the U-shaped rigid stopper (7) and the U-shaped flexible stopper (8) is arc-shaped.

7. A bridge earthquake-resistant device provided with hill-type flexible stoppers according to claim 5, wherein the U-shaped steel plate (6) is a flat steel plate with two ends bent upwards respectively; the included angle between the upward part and the horizontal section part is 120-150 degrees.

8. The anti-seismic device for bridges provided with the hill-type flexible stop block according to claim 2, wherein the flexible stop block (8) is provided with a filling opening (10) at the bottom, and the rigid stop block (7) and the rigid cover plate are provided with through holes at corresponding positions.