WO2021108992A1

WO2021108992A1 - Connection structure for antiseismic bridge

Info

Publication number: WO2021108992A1
Application number: PCT/CN2019/122730
Authority: WO
Inventors: 刘西平
Original assignee: 昆山顶牛市政建设有限公司
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2021-06-10

Abstract

Disclosed is a connection structure for an antiseismic bridge, used for connecting adjacent primary beams of a bridge. The bridge comprises piers; a cap beam is fixedly connected to the top of each bridge pier; the upper end of the cap beam is connected to supports, and a primary beam is connected to the top of each support; two adjacent primary beams are defined as the left and right primary beams; the connection structure comprises a steel plate and a plurality of buffer supports; the buffer supports are rubber columns having compression springs sleeved on the outer circumference thereof; and the thickness of the steel plate in the height direction of the primary beam is 0.2-0.4 times the height of the primary beam. The connection structure also comprises fastening components, which comprise concrete anchor blocks and prestressed steel bars. Two sides of both the left and right primary beams are provided with concrete anchor blocks; both ends of each prestressed steel bar are respectively anchored to the concrete anchor blocks of the left and right primary beams on the adjacent sides. The present utility model is provided with buffering and damping parts and fastening components, so that the primary beams is capable of buffering and damping, and has high supporting strength, good durability, and long service life, so that the maintenance and use costs of the bridge are reduced.

Description

Connecting structure for seismic bridge

Technical field

The utility model relates to the technical field of bridge engineering, in particular to a connection structure for seismic bridges.

Background technique

After the multi-span girder bridge is put into operation, hazards such as main girder collision and girder drop may occur due to earthquakes or large trucks.

In response to the above hazards, the bridge seismic buffer specification and related papers and patents have proposed some solutions, such as adding rubber pads between the beams, or increasing the size of the cover beam to prevent the beam from falling. However, the above measures have the following shortcomings:

(1) In the event of an earthquake, the rubber pads between the main beams failed to effectively exert energy absorption due to the large gap between the main beams;

(2) Increasing the size of the cover beam is only a passive method of preventing falling beams, and has no shock absorption effect;

(3) The strength of the link between two adjacent main beams is low, and the supporting effect is not ideal.

In order to overcome the above-mentioned shortcomings, those skilled in the art actively innovate and research in order to create a connecting structure for seismic bridges.

Utility model content

In view of the problems existing in the prior art, the utility model provides a connection structure for earthquake-resistant bridges, which is provided with cushioning and damping components and fastening components, so that the main beam has the advantages of cushioning, damping and high supporting strength, and is durable With good performance and long service life, it reduces the maintenance and use cost of the bridge.

In order to solve the above technical problems, a technical solution adopted by the present utility model is to provide a connecting structure for seismic bridges. The connecting structure is used to connect adjacent main beams of the bridge, and the length direction of the bridge is defined as left and right. The width direction of the bridge is defined as front and rear. The bridge includes piers. The upper ends of the piers are fixedly connected with a cover beam, the upper end of the cover beam is connected to a support, and the upper part of the support is connected to the main girder. The main beam is defined as the left main beam and the right main beam;

The connection structure includes a steel plate and a plurality of buffer supports, the buffer support refers to a rubber column sheathed with a compression spring, the lower end of the buffer support is fixed to the cover beam, and the upper end is fixed to the steel plate , The upper surface of the steel plate is flush with the upper surface of the main beam, and the steel plate is fixedly connected to the left main beam and the right main beam;

The thickness of the steel plate in the height direction of the main beam is 0.2-0.4 times the height of the main beam;

The connection structure further includes a fastening component, the fastening component includes a concrete anchor block and prestressed steel bars, both sides of the left main beam and the right main beam are provided with the concrete anchor blocks, prestressed steel bars The two ends of the cable are respectively anchored to the concrete anchor block of the left main beam and the concrete anchor block of the right main beam on the same side.

Furthermore, the buffer supports are arranged in a matrix, and the distance between adjacent buffer supports is 0.5-1.2 times the diameter of the buffer supports.

Furthermore, each of the concrete anchor blocks is provided with holes for the prestressed steel bars to pass through, and both ends of the prestressed steel bars pass through the holes of the concrete anchor blocks and are anchored to the concrete anchor blocks after being stretched. The straight length of the hole is 11-14 cm.

Furthermore, the circumference of the steel plate and the left main beam and the right main beam are fixedly connected by pouring concrete.

Furthermore, the prestressed steel bar is composed of multiple monofilaments, and the number of the monofilaments is 12-16.

Furthermore, the fastening assembly is provided with four groups, and the front and rear sides of the main beam are provided with two groups.

The beneficial effects of the utility model are:

The utility model is provided with buffering and damping parts and fastening components, so that the main beam has the advantages of buffering, damping and high supporting strength, and has good durability and long service life, reducing the maintenance and use cost of the bridge;

Among them, the utility model includes a shock absorber, a concrete anchor block, and a prestressed steel bar anchored to the concrete anchor block. Due to the tensile stress of the prestressed steel bar, the main beam can be closely attached to the left and right sides of the steel plate. When an earthquake occurs, when the seismic wave is in the longitudinal direction, the rubber column can absorb energy to form a buffering effect; it can also make the rubber column and spring absorb and reduce the vibration generated by the vehicle when the vehicle passes by, thereby improving the seismic buffer of the bridge;

In addition, due to the steel plate, the strength of the steel plate and the rigidity of the spring are fully utilized to ensure the bridge's seismic cushioning performance, with sufficient strength to ensure the service life of the bridge and reduce maintenance costs.

The above description is only an overview of the technical solution of the present utility model. In order to have a clearer understanding of the technical means of the present utility model and can be implemented in accordance with the content of the specification, the following is a detailed description of the preferred embodiment of the present utility model with accompanying drawings. Rear.

Description of the drawings

Figure 1 is a front view of the utility model;

Figure 2 is a top view of the utility model;

The parts in the drawings are marked as follows:

Pier 1, cover beam 2, support 3, main beam 4, left main beam 41, right main beam 42, concrete anchor block 51, prestressed steel bar 52, buffer support 6, compression spring 61, rubber column 62, steel plate 7 .

Detailed ways

Specific implementations of the present invention will be described below through specific specific examples. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. The present utility model can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed by the present utility model.

Example: A connecting structure for an earthquake-resistant bridge, as shown in Figures 1 and 2, the connecting structure is used to connect adjacent main beams of the bridge, the length direction of the bridge is defined as left and right, and the width direction of the bridge Defined as front and rear, the bridge includes a pier 1, the upper end of the pier is fixedly connected to a cap beam 2, the upper end of the cap beam is connected to a support 3, and the upper end of the support is connected to the main beam 4, connecting two adjacent main beams The beams are defined as the left main beam 41 and the right main beam 42;

The connection structure includes a steel plate 7 and a plurality of buffer supports 6. The buffer support refers to a rubber column 62 sheathed with a compression spring 61, the lower end of the buffer support is fixed to the cover beam, and the upper end is fixed For the steel plate, the upper surface of the steel plate is flush with the upper surface of the main beam, and the steel plate is fixedly connected to the left main beam and the right main beam;

The connecting structure further includes a fastening component, the fastening component includes a concrete anchor block 51 and prestressed steel bars 52, the left main beam and the right main beam are provided with the concrete anchor blocks on both sides, and the Both ends of the stress steel bars are respectively anchored to the concrete anchor block of the left main beam and the concrete anchor block of the right main beam on the same side.

In this embodiment, the buffer supports are arranged in a matrix, and the distance between adjacent buffer supports is 0.5-1.2 times the diameter of the buffer supports.

Each of the concrete anchor blocks is provided with a hole for the pre-stressed steel bar to pass through, and both ends of the pre-stressed steel bar pass through the hole of the concrete anchor block and are anchored to the concrete anchor block after being stretched. The straight longitude is 11-14cm.

The circumference of the steel plate and the left main beam and the right main beam are fixedly connected by pouring concrete.

The prestressed steel bar is composed of multiple monofilaments, and the number of the monofilaments is 12-16.

The fastening assembly is provided with four groups, and the front and rear sides of the main beam are provided with two groups, but it is not limited to this.

The working process and working principle of the utility model are as follows:

The connection structure in this embodiment is provided with cushioning and damping components and fastening components, so that the main beam has the advantages of cushioning, damping and high support strength, and has good durability and long service life, reducing the maintenance and use cost of the bridge;

The above are only the embodiments of the present utility model, not for this reason, the above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent made by using the contents of the present utility model description and drawings The structure, whether directly or indirectly used in other related technical fields, is similarly included in the scope of patent protection of this utility model.

Claims

A connecting structure for an earthquake-resistant bridge is characterized in that the connecting structure is used to connect adjacent main beams of the bridge, the length direction of the bridge is defined as left and right, and the width direction of the bridge is defined as front and rear, and the bridge includes piers ( 1), the upper part of the bridge pier is fixedly connected to the cover beam (2), the upper end of the cover beam is connected to the support (3), and the upper part of the support is connected to the main beam (4), connecting two adjacent main beams The beams are defined as the left main beam (41) and the right main beam (42);

The connection structure includes a steel plate (7) and a plurality of buffer supports (6), the buffer support refers to a rubber column (62) sheathed with a compression spring (61), and the lower end of the buffer support is fixed to The cover beam has an upper end fixed to the steel plate, the upper surface of the steel plate is flush with the upper surface of the main beam, and the steel plate is fixedly connected to the left main beam and the right main beam;

The thickness of the steel plate in the height direction of the main beam is 0.2-0.4 times the height of the main beam;

The connection structure further includes a fastening component, the fastening component includes a concrete anchor block (51) and prestressed steel bars (52), and both sides of the left main beam and the right main beam are provided with the concrete The anchor block, the two ends of the prestressed steel bar are respectively anchored to the concrete anchor block of the left main beam and the concrete anchor block of the right main beam on the same side.
The connection structure for seismic bridges according to claim 1, wherein the buffer supports are arranged in a matrix, and the distance between adjacent buffer supports is 0.5-1.2 times the diameter of the buffer supports .
A connection structure for an earthquake-resistant bridge according to claim 1, wherein each of the concrete anchor blocks is provided with holes for the pre-stressed steel bars to pass through, and both ends of the pre-stressed steel bars pass The hole of the concrete anchor block is anchored to the concrete anchor block after being stretched, and the straight length of the hole is 11-14 cm.
The connection structure for an earthquake-resistant bridge according to claim 1, characterized in that: the circumference of the steel plate and the left main beam and the right main beam are fixedly connected by pouring concrete.
The connection structure for seismic bridges according to claim 1, wherein the prestressed steel bar is composed of multiple monofilaments, and the number of the monofilaments is 12-16.
The connecting structure for an earthquake-resistant bridge according to claim 1, wherein the fastening assembly is provided with four groups, and the front and rear sides of the main beam are provided with two groups.