CN219408940U - Low wind resistance shore bridge girder - Google Patents

Abstract

The utility model discloses a main girder of a shore bridge with low wind resistance, a box-shaped structure and a plurality of through holes arranged on the box-shaped structure; the box-shaped structure includes an upper wing plate, a lower wing plate, and a straight web and an inclined web connected between the upper wing plate and the lower wing plate, and the straight web is a windward side; the box-shaped structure is provided with a plurality of partitions distributed at equal intervals; the through holes pass through the straight web and the inclined web; each through hole is located between two partitions. The utility model can effectively reduce the windward area.

Description

Main girder of a bank-resistance bridge in low wind

technical field

The utility model relates to a main girder structure of a quay bridge, in particular to a main girder of a quay bridge with low wind resistance.

Background technique

The quay crane, also known as the quayside container crane, is a device that uses a trolley to move back and forth on the track, and uses a spreader to load and unload the container on the container ship. As shown in Figure 1 and Figure 2, conventional quay bridges mainly use box girders as the main girders, and the main girders of quay bridges are located in the upper structure of the quay bridge, and because of the large windward area, the wind load it bears is also large.

In order to meet the structural strength of the quay crane under storm conditions, it is often necessary to increase the plate thickness and height of the main girder, which increases the weight and manufacturing cost of the quay crane. Therefore, if there is a main girder of the quay bridge that can greatly reduce the wind force, it is very critical and important.

Utility model content

In view of the above-mentioned defects in the prior art, the purpose of this utility model is to provide a main girder of a bank bridge with low wind resistance, which can effectively reduce the windward area.

In order to achieve the above object, the utility model adopts the following technical solutions:

A main girder of a bank bridge with low wind resistance, a box structure and a plurality of through holes arranged on the box structure;

The box-shaped structure includes an upper wing plate, a lower wing plate, and a straight web and an oblique web connected between the upper wing plate and the lower wing plate, and the straight web is the windward side;

The box-shaped structure is provided with a plurality of equally spaced partitions;

The through hole runs through the straight web and the inclined web;

Each of the through holes is respectively located between the two partitions.

Preferably, the through holes are configured as circular holes, rectangular holes or waist-shaped holes.

Preferably, when the through hole is a rectangular hole, its corners are rounded.

Preferably, a collar is provided in the through hole.

Preferably, the position of the through hole is ≤ 1/3 of the height of the box structure; and

The circular axis of the through hole coincides with the height of the partition plate toward the central axis.

Preferably, the length of the through holes is less than or equal to the distance between the partitions*0.4.

Preferably, T-shaped steel and angle steel are also arranged in the box structure.

Preferably, a trolley rail support beam is provided on the inclined web.

Preferably, the spacing between the partitions is <2m.

The main girder of a quayside bridge with low wind resistance provided by the utility model reduces the wind force received by about 10% to 20%, which can achieve the effects of reducing the plate thickness of the main girder, reducing the wheel pressure of the whole machine, reducing the weight of the whole machine and the manufacturing cost. At the same time, it meets the structural strength of the quay bridge under the storm condition.

Description of drawings

Fig. 1 is the schematic diagram of existing quay bridge girder;

Fig. 2 is a schematic diagram of direction A in Fig. 1;

Fig. 3 is the schematic diagram of the main girder of the utility model low wind resistance shore bridge;

Fig. 4 is a schematic diagram of direction A in Fig. 3, wherein, (a) the through hole is a circular hole, (b) the through hole is a rectangular hole, and (c) the through hole is a waist-shaped hole;

Fig. 5 is a schematic diagram of the overall axial view of the main girder of the low wind resistance quayside bridge of the present invention.

Detailed ways

In order to better understand the above-mentioned technical solution of the utility model, the technical solution of the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 3 to Fig. 5, the utility model provides a main girder of a bank bridge with low wind resistance, a box-shaped structure and a plurality of through holes 1 provided on the box-shaped structure.

The box-shaped structure includes an upper wing 2, a lower wing 3, and a straight web 4 and an oblique web 5 welded between the upper wing 2 and the lower wing 3. The straight web 4 is the windward side.

The box-shaped structure is provided with a plurality of partitions 6 distributed at equal intervals. The spacing of the partitions 6 is less than 2m. The number of partitions 6 is determined according to the total length of the main girder of the quay bridge.

The through holes 1 directly pass through the straight web 4 and the inclined web 5 , and each through hole 1 is located between two partitions 6 .

The through hole 1 is set as a circular hole (as shown in Figure 4 (a)), a rectangular hole (as shown in Figure 4 (b)) or a waist-shaped hole (as shown in Figure 4 (c)), and the specific opening size can be adjusted according to the actual project design.

When the through hole 1 is a rectangular hole, its corners are set as rounded corners.

A ring 7 is provided in the through hole 1, and the ring 7 is directly welded on the straight web 4 and the inclined web 5, which can strengthen the strength of the main girder after the web is opened, and also prevent the inside of the box structure from being directly exposed to the external environment, and play a sealing role.

The position of the through hole 1 needs to be less than or equal to 1/3 of the height of the box structure; and the circular axis of the through hole 1 coincides with the height of the partition plate 6 toward the central axis.

The length of the through hole 1 needs to be less than or equal to the distance between two partitions 6 * 0.4.

There are also T-shaped steel 8, angle steel 9 in the box-shaped structure, T-shaped steel 8, angle steel 9 and partition plate 6 are welded to the web and wing plate respectively, which are mainly used to strengthen the strength of the main girder and the overall stability.

The trolley rail bearing beam 10 is directly welded on the inclined web 5 .

Compared with the main girder of the conventional quay bridge, the main girder of the low-wind resistance quay bridge of the utility model effectively reduces the windward area, thereby reducing the wind force received by the quay bridge by about 10% to 20%.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, changes and modifications to the above-described embodiments will fall within the scope of the claims of the utility model.

Claims (9)

1. A main girder of a quayside bridge with low wind resistance, characterized in that: a box-shaped structure and a plurality of through holes arranged on the box-shaped structure; The box-shaped structure includes an upper wing plate, a lower wing plate, and a straight web and an oblique web connected between the upper wing plate and the lower wing plate, and the straight web is the windward side; The box-shaped structure is provided with a plurality of equally spaced partitions; The through hole runs through the straight web and the inclined web; Each of the through holes is respectively located between the two partitions. 2. The main girder of the low wind resistance bank bridge according to claim 1, characterized in that: the through holes are set as circular holes, rectangular holes or waist-shaped holes. 3. The main girder of the low-wind resistance shore bridge according to claim 2, characterized in that: when the through hole is a rectangular hole, the corners thereof are set as rounded corners. 4. The main girder of the low wind resistance bank bridge according to claim 2, characterized in that: the said through hole is provided with a ring. 5. The main girder of the low wind resistance shore bridge according to claim 2, characterized in that: the position of the through hole is ≤ 1/3 of the height of the box structure; and The circular axis of the through hole coincides with the height of the partition plate toward the central axis. 6. The main girder of the low wind resistance shore bridge according to claim 2, characterized in that: the length of the through hole≤the spacing of the partitions*0.4. 7. The main girder of the low-wind resistance bank bridge according to claim 1, characterized in that: T-shaped steel and angle steel are also arranged in the box-shaped structure. 8. The main girder of the low wind resistance shore bridge according to claim 1, characterized in that: the inclined web is provided with a trolley rail support beam. 9. The main girder of the low wind resistance shore bridge according to claim 1, characterized in that: the distance between the partitions is <2m.