CN114908662A

CN114908662A - Semi-rigid connection structure suitable for capping beam and upright post in earthquake multi-occurrence area

Info

Publication number: CN114908662A
Application number: CN202210672981.9A
Authority: CN
Inventors: 刘方宁; 吕梁胜; 刘健; 蒋炜; 陈蒙; 朱炳章; 宋健; 彭静
Original assignee: Shanghai Dijiang Group Co ltd; Shanghai Dijiang Construction Technology Co ltd
Current assignee: Shanghai Dijiang Group Co ltd; Shanghai Dijiang Construction Technology Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-08-16

Abstract

The invention discloses a semi-rigid connection structure suitable for a capping beam and an upright post in an earthquake-prone area, which comprises a bearing platform, wherein the two sides of the top of the bearing platform are fixedly connected with the upright post, the top of the upright post is fixedly connected with the capping beam, the upright post comprises a precast concrete column cap, the top of the precast concrete column cap is fixedly connected with a vertical steel bar, the vertical steel bar extends to an inner cavity of the capping beam, and the surface of the vertical steel bar is fixedly connected with a stirrup. The invention can realize large construction tolerance, limit the damage in the plastic hinge and prevent the bent steel bar of the bent steel bar under the action of a large earthquake through the bearing platform, the upright post and the bent steel bar, and has the advantage of good earthquake resistance.

Description

Semi-rigid connection structure suitable for capping beam and upright post in earthquake multi-occurrence area

Technical Field

The invention relates to the technical field of bridges, in particular to a semi-rigid connection structure suitable for a bent cap and an upright post in an earthquake-prone area.

Background

In recent years, earthquakes occur frequently around the world, and direct and indirect economic losses caused by each earthquake damage to a bridge structure are very huge, so that the requirement of people on the earthquake resistance of the bridge is higher and higher, and effective measures for improving the earthquake resistance of the bridge are that under the action of the earthquake, a node which is possibly damaged is strengthened to absorb kinetic energy generated by the action of the earthquake, so that the falling or the damage of the bridge structure caused by collision under the action of the earthquake is relieved, and according to the regulations on the current highway bridge earthquake resistance design rule JTG/TB02-01-2008 in China: seismic intensity of 7 degrees and above 7 degrees, seismic isolation and reduction devices are used, for example, elastic devices are arranged between the main beams and the abutment breast wall,

and current cushion integrated configuration includes dorsal fixed plate and the protection steel sheet of front side, this kind of cushion integrated configuration discovers in the in-service use, the protect function of the protection steel sheet of front side is not enough, not only extravagant material, and its production preparation is all more complicated, it sets up exhaust hole and exhaust duct to need to correspond on the protection steel sheet, the cost of manufacture is higher, and simultaneously, the connecting hole of seting up on the fixed plate is all passed through with it to the connection of current cushion integrated configuration and bridge or abutment, and in case cushion integrated configuration takes place the problem when needing to be changed, because the distance between bridge or the abutment is not fixed only, if when the distance is narrower, thereby constructor can't get into and lead to changing work and carry out the difficulty.

Disclosure of Invention

The invention aims to provide a semi-rigid connection structure suitable for a bent cap and an upright post in an earthquake multi-occurrence area, which has the advantage of good earthquake resistance and solves the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a semi-rigid connection structure suitable for a bent cap and an upright post in an earthquake multi-occurrence area comprises a bearing platform, wherein the upright post is fixedly connected to two sides of the top of the bearing platform, and the bent cap is fixedly connected to the top of the upright post;

the upright column comprises a precast concrete column head, wherein the top of the precast concrete column head is fixedly connected with a vertical steel bar, the vertical steel bar extends to the inner cavity of the capping beam, the surface of the vertical steel bar is fixedly connected with a stirrup, UHPC is poured at the joint between the precast concrete column head and the vertical steel bar, ordinary concrete is poured at the top of the UHPC, an UHPC column head is poured at the top of the ordinary concrete, and the UHPC column head extends to the inner cavity of the capping beam;

the capping beam comprises prestressed tendons, a UHPC transverse clapboard is poured on the surface of each prestressed tendon, a UHPC top plate is poured on the top of the UHPC transverse clapboard, a UHPC cushion block is fixedly connected to the top of the UHPC top plate, and a hoisting ring is fixedly connected to the top of the UHPC top plate.

Preferably, the columns are prefabricated in a factory and installed on site.

Preferably, the splicing area between the precast concrete column cap and the vertical steel bar is welded by adopting double-sided welding.

Preferably, the top of the UHPC column head needs to be paved with cushion bedding slurry during assembly, and the bottom of the bent cap is provided with an assembly hole.

Preferably, the bottom of the upright post is reserved with a mounting hole, and the mounting hole is matched with a top assembling post of the bearing platform for use.

Preferably, the UHPC is prepared by sleeve grouting after the upright column and the bent cap are assembled, and grouting adopts a method of grouting at a grouting port at the bottom of the sleeve and grouting at a grout outlet at the top.

Preferably, the common concrete becomes a plastic hinge area after being solidified and formed.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can realize large construction tolerance, limit the damage in the plastic hinge and prevent the bent steel bar of the bent steel bar under the action of a large earthquake through the bearing platform, the upright post and the bent steel bar, and has the advantage of good earthquake resistance.

2. According to the invention, the splicing area between the precast concrete column cap and the vertical steel bar is welded by adopting double-sided welding, so that the connection quality can be ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of the present invention;

FIG. 3 is a schematic left side sectional view of the inventive structure;

FIG. 4 is a schematic cross-sectional view of the capping beam of the present invention;

FIG. 5 is a schematic view of a column of the present invention;

fig. 6 is a schematic top view of a pillar according to the present invention.

In the figure: 1. a bearing platform; 2. a column; 21. a concrete column cap; 22. UHPC; 23. ordinary concrete; 24. UHPC column cap; 25. vertical reinforcing steel bars; 26. hooping; 3. a capping beam; 31. prestressed tendons; 32. a UHPC cushion block; 33. a UHPC diaphragm plate; 34. a UHPC top plate; 35. and (6) hoisting a ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The components of the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.

Referring to fig. 1-6, a semi-rigid connection structure for a capping beam and an upright post in an earthquake-prone area comprises a bearing platform 1, wherein the two sides of the top of the bearing platform 1 are fixedly connected with upright posts 2, the upright posts 2 are prefabricated in a factory and are installed on site, mounting holes are reserved at the bottoms of the upright posts 2 and are matched with assembly posts at the top of the bearing platform 1 for use, and the top of the upright posts 2 is fixedly connected with a capping beam 3;

the upright post 2 comprises a precast concrete post head 21, a vertical steel bar 25 is fixedly connected to the top of the precast concrete post head 21, splicing areas between the precast concrete post head 21 and the vertical steel bar 25 are welded by double-sided welding, the connection quality can be ensured by welding the splicing areas between the precast concrete post head 21 and the vertical steel bar 25 by double-sided welding, the vertical steel bar 25 extends to an inner cavity of the capping beam 3, a stirrup 26 is fixedly connected to the surface of the vertical steel bar 25, UHPC22 is poured at the joint between the precast concrete post head 21 and the vertical steel bar 25, UHPC22 is prepared by sleeve grouting after the upright post 2 and the capping beam 3 are assembled, grouting adopts methods of sleeve bottom grouting opening grouting and top grout outlet grouting, a common concrete 23 is poured at the top of the UHPC22, the common concrete 23 is solidified and formed to form a plastic hinge area, a UHPC post head 24 is poured at the top of the common concrete 23, the UHPC column cap 24 extends to the inner cavity of the bent cap 3, the top of the UHPC column cap 24 needs to be paved with cushion bedding slurry during assembly, and the bottom of the bent cap 3 is provided with an assembly hole;

the capping beam 3 comprises prestressed tendons 31, a UHPC transverse partition plate 33 is poured on the surface of each prestressed tendon 31, a UHPC top plate 34 is poured on the top of each UHPC transverse partition plate 33, a UHPC cushion block 32 is fixedly connected on the top of each UHPC top plate 34, and a hoisting ring 35 is fixedly connected on the top of each UHPC top plate 34. the capping platform 1, the upright post 2 and the capping beam 3 can realize large construction tolerance, limit the damage in a plastic hinge and prevent the capping beam 3 from yielding the steel bar under the action of a large earthquake, so that the capping beam has the advantage of good earthquake resistance.

When the earthquake-proof cover beam is used, when an earthquake occurs, the upright post 2 consumes a part of energy generated by the earthquake through the middle plastic hinge area so as to reduce the damage of earthquake impact on the joint of the cover beam 3 and the upright post 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a be applicable to earthquake area bent cap and stand semi-rigid connection structure that sends out more, includes cushion cap (1), its characterized in that: both sides of the top of the bearing platform (1) are fixedly connected with upright columns (2), and the tops of the upright columns (2) are fixedly connected with bent caps (3);

the upright column (2) comprises a precast concrete column head (21), vertical steel bars (25) are fixedly connected to the top of the precast concrete column head (21), the vertical steel bars (25) extend to the inner cavity of the cover beam (3), stirrups (26) are fixedly connected to the surface of the vertical steel bars (25), UHPC (22) is poured at the joint between the precast concrete column head (21) and the vertical steel bars (25), ordinary concrete (23) is poured at the top of the UHPC (22), an UHPC column head (24) is poured at the top of the ordinary concrete (23), and the UHPC column head (24) extends to the inner cavity of the cover beam (3);

the capping beam (3) comprises prestressed tendons (31), a UHPC diaphragm plate (33) is poured on the surface of each prestressed tendon (31), a UHPC top plate (34) is poured on the top of each UHPC diaphragm plate (33), the top of each UHPC top plate (34) is fixedly connected with a UHPC cushion block (32), and the top of each UHPC top plate (34) is fixedly connected with a hoisting ring (35).

2. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: the upright post (2) is prefabricated in a factory and is installed on site.

3. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: and the splicing area between the precast concrete column cap (21) and the vertical steel bar (25) is welded by adopting double-sided welding.

4. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: when the UHPC column cap (24) is assembled, the top of the UHPC column cap needs to be paved with cushion bedding slurry, and the bottom of the bent cap (3) is provided with an assembling hole.

5. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: and mounting holes are reserved at the bottoms of the stand columns (2) and are matched with the top assembling columns of the bearing platform (1) for use.

6. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: and the UHPC (22) is prepared by sleeve grouting after the upright post (2) and the bent cap (3) are assembled, and grouting adopts a method of grouting at a grouting opening at the bottom of the sleeve and grouting at a grout outlet at the top.

7. The semi-rigid connection structure of the capping beam and the upright post for earthquake multiple-occurrence areas of claim 1, wherein: the common concrete (23) becomes a plastic hinge area after being solidified and formed.