Large-span arched truss girder offshore booster station without interlayer support

Abstract

The invention discloses a large-span arched truss girder offshore booster station without interlayer support. The platform comprises main columns, main beams, platform middle beams, secondary beams and a deck, arched truss beams are connected between the main columns to serve as the main beams, each main beam is of an arched truss structure with the two ends wide and the middle narrow, the platform middle beams are connected between the main beams, and the two ends of each secondary beam are connected with upper chords of the main beams and the platform middle beams. And decks are arranged above the secondary beams, the main beams and the platform middle beams. The arch truss structure is used for a large-span steel structure platform, no other interlayer supporting structure exists except the main column, compared with a conventional solid-web I-shaped steel beam, the arch truss structure has the advantages of being large in vertical rigidity, high in bearing capacity, uniform in stress, good in stability and the like, the self weight of the structure can be well reduced, the steel using amount is optimized, flexible arrangement of equipment is facilitated, and the service life of the equipment is prolonged. And the space utilization rate of the offshore booster station is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore booster stations, and in particular relates to an offshore booster station with a large span arched truss beam without interlayer support. Background Art

[0002] Offshore wind power resources are abundant, so the development and application prospects of offshore wind power are broad. The offshore booster station is an important hub for transmitting electricity in offshore wind farms, and is used to collect and transmit the electricity generated by offshore wind turbines. Existing offshore boosters basically adopt an overall spatial truss structure, that is, a structural system including steel columns, beams, and diagonal braces (such as patents CN202320781896.6 and CN202120611883.5) to meet the effects of complex equipment loads, live loads, and environmental loads. Among them, large-span I-beams of different cross-sectional sizes are used as main beams and secondary beams, and interlayer columns and diagonal braces are used as interlayer support structures to form an overall truss structure. However, existing offshore boosters have problems such as large amount of structural steel and high construction costs.

[0003] As offshore land becomes increasingly scarce, the offshore booster station's distance from the shore and installed capacity are gradually increasing. A large-capacity offshore booster station means a larger offshore booster station and a more complex equipment layout. Therefore, a new offshore booster station is invented to meet the requirements of compact and symmetrical layout, light structure and high space utilization. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a large-span arched truss beam offshore booster station without interlayer support. It is suitable for large-capacity and large-volume offshore booster stations. For the large-span offshore booster station structure, the present invention has the advantages of saving steel, strong structural stability, no interlayer support, more flexible equipment layout, more adequate space utilization, etc., which is more conducive to the structural design and layout optimization of the offshore booster station.

[0005] The technical solution adopted by the present invention is: a large-span arched truss beam offshore booster station without interlayer support, including main columns, main beams, platform middle beams, secondary beams, and decks. Arched truss beams are connected between the main columns as main beams. The main beam structure is an arched truss structure that is wide at both ends and narrow in the middle. The platform middle beam is connected between the main beams, and the platform middle beam serves as a supporting structure in the middle position of the large-span platform. The two ends of the secondary beam are connected to the upper chords of the main beam and the platform middle beam. A deck is arranged above the secondary beam, the main beam, and the platform middle beam, and the deck serves as a platform for placing equipment and for people to move around.

[0006] In a further preferred structure, the main column is a circular steel pipe pile, and the main column serves as the main supporting structure of the upper structure of the offshore booster station.

[0007] In a further preferred structure, the main beam comprises an upper chord and a lower chord, the upper chord is horizontal, and the lower chord is arched upward.

[0008] In a further preferred structure, vertical and oblique web members are arranged between the upper chord and the lower chord to form a triangular support structure.

[0009] A further preferred structure is that the middle beam of the platform adopts an arched truss structure with a lower chord that bends downward, the structure is narrow at both ends and wide in the middle, and the two ends of the middle beam of the platform are vertically connected to the upper chord of the main beam to form a field-shaped grid.

[0010] In the above scheme, the upper load is transferred to the main beam through the middle beam and then to the main column.

[0011] A further preferred structure is that the middle beam of the platform adopts an arched truss structure with a lower chord that bends upward, the structure is wide at both ends and narrow in the middle, and both ends of the middle beam of the platform are connected to the main columns to form an X-shaped grid.

[0012] In the above scheme, the upper load can be transferred to the main column through the middle beam of the platform, reducing the force transmission path of the upper load.

[0013] In a further preferred structure, the secondary beam is a horizontal I-beam crossbeam and serves as a force transmission beam of the platform.

[0014] As a further preferred structure, the large-span arched truss beam offshore booster station without interlayer support is suitable for a large-span offshore booster station steel structure platform with a span greater than 30m.

[0015] In a further preferred structure, the upper chord, the lower chord and the web of the arched truss beam are all made of I-beams.

[0016] In a further preferred structure, the arched truss beam is a symmetrical structure with a horizontal section in the middle, and the length of the horizontal section is adjusted according to the requirements of span and floor height.

[0017] The present invention has no other interlayer support structure except the main column, and the arched truss beam provides vertical bearing capacity. The upper load acts on the upper chord of the arched truss beam, and is transmitted to the arched lower chord through the vertical and oblique web members, and finally converted into the pressure of the lower chord. The force transmission path is clear and the structural stability is good.

[0018] Compared with conventional offshore booster stations, the present invention has the following advantages: the main beam and the platform middle beam of the present invention adopt an arched truss structure, which is suitable for large-span steel structure platforms. Compared with conventional solid-web I-beam steel beams, the arched truss structure has the advantages of large vertical stiffness, high bearing capacity, uniform force, good stability, etc. It can effectively reduce the dead weight of the structure and optimize the amount of steel used. The structural system has no interlayer support structure, which is conducive to the flexible arrangement of equipment and improves the space utilization rate of the offshore booster station. The above beneficial effects show that the present invention has good engineering prospects, especially for the large-span beam structure of large-capacity and large-volume offshore booster stations, which can more easily give play to the structural advantage of low steel consumption and save construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structural form of the present invention;

[0020] Figure 2 This is the main beam elevation view of the structural form;

[0021] Figure 3 This is the elevation view of the middle beam of the platform of the structural form one;

[0022] Figure 4 This is a model diagram of a single-layer truss beam structure;

[0023] Figure 5 This is a schematic diagram of the second structural form of the present invention;

[0024] Figure 6 This is the elevation drawing of the main beam of the second structural form;

[0025] Figure 7 This is the elevation drawing of the middle beam of structural type 2;

[0026] Figure 8 This is a model diagram of a two-layer single-layer truss beam structure.

[0027] In the figure: 1. Column; 2. Main beam; 3. Middle beam of platform; 4. Secondary beam; 5. Upper chord; 6. Lower chord; 7. Web member; 8. Deck. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0029] Structural form - see Figure 1-Figure 4 , see Structure 2 Figure 5-Figure 8 .like Figure 1 , Figure 5As shown, the large-span arched truss beam offshore booster station without interlayer support described in the present invention includes a column 1, a main beam 2, a platform middle beam 3, a secondary beam 4, and a deck 8. The entire structure is vertically supported by four main columns 1, and circular steel pipe piles are used. Preferably, DH36 steel pipes are used, and the diameter is selected from 1.4m to 2.0m according to actual needs as the main supporting structure of the upper structure of the offshore booster station. The main columns 1 are connected by the main beam 2, and the main beam 2 adopts an arched truss beam structure with wide ends and narrow middle, including an upper chord 5, a lower chord 6, and a web 7. The upper chord 5 is horizontal, the lower chord 6 is arched upward, and vertical and oblique webs 7 are arranged in the middle to form a triangular support structure. The upper chord 5, the lower chord 6 and the web 7 at both ends of the main beam 2 are welded to the main column 1. The platform middle beam 3 and the platform middle beam 3 are connected between the main beams 2. The platform middle beam 3 of structural form 1 adopts an arch truss structure with narrow ends and wide middle. The upper chord and lower chord at both ends are welded to the upper chord 5 in the middle of the main beam 2. The platform middle beam 3 is vertically connected to the main beam 2 to form a field-shaped grid. The platform middle beam 3 of structural form 2 adopts the same arch truss structure with wide ends and narrow middle as the main beam 2. The two ends of the platform middle beam 3 are connected to the main column 1 to cross to form an X-shaped grid. The upper chord, lower chord and web members are all welded to the main column 1. A horizontal I-beam crossbeam is arranged between the main beam 2 and the platform middle beam 3 as a secondary beam 4. The secondary beam 4 is connected to the upper chords of the main beam 2 and the platform middle beam 3 to form a horizontal crossbeam grid, and a deck 8 is arranged above.

[0030] In some optional embodiments, the main beam 2, the platform middle beam 3, the upper chord 5, the lower chord 6 and the web 7 are all made of DH36 steel, with an I-beam cross-section, and the spacing of the vertical webs can be adjusted according to the maximum height of the truss.

[0031] In some optional embodiments, the secondary beam 4 can be made of Q355C I-beam and welded to the I-beams of the main beam 2 , the platform middle beam 3 , and the upper chord 5 .

[0032] In some optional embodiments, the arched truss beam is a symmetrical structure, the upper chord 5, the lower chord 6 and the web 7 form a triangular stable structure, and there is a horizontal section in the middle of the truss beam, and the length of the horizontal section can be adjusted according to the requirements of the span and floor height.

[0033] The arched truss beam structure has the characteristics of good bending resistance, high bearing capacity, uniform force, good stability, etc., and the arched structure can provide vertical bearing capacity and optimize vertical support. Compared with the solid-web steel beams of conventional offshore booster stations, steel truss beams can save 10% of steel, eliminate interlayer support, further reduce the deadweight of the structure, meet the needs of lightweight design of offshore booster stations, and save construction costs. At the same time, the structural system without interlayer support is conducive to the flexible arrangement of equipment and the optimization of the overall layout, and improves the space utilization rate of offshore booster stations.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A large-span arched truss beam offshore booster station without interlayer support, characterized in that: It includes main columns, main beams, platform middle beams, secondary beams and decks. Arched truss beams are connected between the main columns as main beams. The main beam structure is an arched truss structure that is wide at both ends and narrow in the middle. The platform middle beam is connected between the main beams. Both ends of the secondary beams are connected to the upper chords of the main beam and the platform middle beam. A deck is arranged above the secondary beam, the main beam and the platform middle beam.

2. The large-span arched truss beam offshore booster station without interlayer support according to claim 1, characterized in that: The main column adopts a circular steel pipe pile.

3. The offshore booster station with a large span arched truss beam without interlayer support according to claim 1, characterized in that: The main beam comprises an upper chord and a lower chord, wherein the upper chord is horizontal and the lower chord is arched upward.

4. The large-span arched truss beam offshore booster station without interlayer support according to claim 3, characterized in that: Vertical and oblique web members are arranged between the upper chord and the lower chord to form a triangular support structure.

5. The large-span arched truss beam offshore booster station without interlayer support according to claim 3, characterized in that: The middle beam of the platform adopts an arched truss structure with a lower chord that bends downward. The structure is narrow at both ends and wide in the middle. The two ends of the middle beam of the platform are vertically connected to the upper chord of the main beam to form a field-shaped grid.

6. The offshore booster station with a large span arched truss beam without interlayer support according to claim 3, characterized in that: The middle beam of the platform adopts an arched truss structure with a lower chord that bends upward. The structure is wide at both ends and narrow in the middle. Both ends of the middle beam of the platform are connected to the main columns to form an X-shaped grid.

7. The large-span arched truss beam offshore booster station without interlayer support according to claim 1, characterized in that: The secondary beam is a horizontal I-beam crossbeam.

8. The large-span arched truss beam offshore booster station without interlayer support according to claim 1, characterized in that: The large-span arched truss beam offshore booster station without interlayer support is suitable for a large-span offshore booster station steel structure platform with a span greater than 30m.

9. The large-span arched truss beam offshore booster station without interlayer support according to claim 1, characterized in that: The upper chord, the lower chord and the web of the arched truss beam are all made of I-beam.

10. The large-span arched truss beam offshore booster station without interlayer support according to claim 1, 5, 6 or 9, characterized in that: The arched truss beam is a symmetrical structure with a horizontal section in the middle. The length of the horizontal section is adjusted according to the requirements of span and floor height.

Images