A large-span integrated bracket structure supporting complex loads

Abstract

The present invention discloses a large-span integrated bracket structure supporting complex loads, which is characterized in that the crane beam adopts a bracket structure integrated with the main truss, the crane beam is supported on the straight web of the main truss, the bracket structure is supported on the factory building columns on both sides, and the factory building roof beam is supported on the upper chord of the main truss, the main truss is composed of an upper chord, an inclined web, a straight web and a lower chord; the crane beam is a box-type structure composed of a web, a horizontal brake plate, a lower flange horizontal support, a vertical support, an upper flange and a lower flange. Compared with the prior art, the present invention has the advantages of simple structure, on-site overall hoisting, and small installation workload, and provides a new solution for structural design that is safe, reliable, saves steel, is economical, and has a short on-site installation period.

Description

Technical Field

[0001] The invention relates to the technical field of industrial building structures, in particular to a large-span integrated bracket structure capable of supporting complex loads. Background Art

[0002] Single-story industrial plants with cranes often have large column spacing due to partial column extraction. The traditional structural solution at large column spacing is to set joists along the longitudinal direction of the column top to support the transverse roof beam, and set large-span crane beams on the column brackets. The span of the crane beam is the same as the large column spacing. The advantages are clear structural force, clear force transmission path, and safety and reliability; the disadvantages are large steel consumption, high project cost, and long on-site construction and installation period.

[0003] For single-story factories with cranes, the existing structural solutions have the following main disadvantages: 1) The crane beam structure at larger column spacing uses a large amount of steel, and the structural engineering cost is relatively high; 2) The cross-sectional height is high, which imposes certain restrictions on the production and use height of the bottom of the crane beam; 3) Support beams are installed on the top of columns with large column spacing, which takes a long time to install on site. Summary of the invention

[0004] The purpose of the present invention is to design a large-span integrated bracket structure that can support complex loads in response to the shortcomings of the existing technology. The main truss adopts a truss structure that transmits the vertical load to the column through the supports arranged at both ends of the upper chord and the lower chord, and transmits the roof load in the large column spacing area to the upper chord node of the main truss to bear the vertical load from the roof beam and the crane beam. The roof beam at the column withdrawal point is supported on the upper chord node of the main truss, and the vertical load of the crane is transmitted to the main truss through the crane beam and the corbels extended from the straight web of the main truss. The lateral horizontal braking force of the crane is transmitted to the factory columns on both sides of the large column spacing through the brake beam formed by the upper flanges of the two crane beams and the horizontal brake plates. It not only meets the use and force requirements of the project, but also has a simple structure and low project cost. It provides a new solution for structural design that is safe, reliable, saves steel, has good economy, and has a short on-site installation period.

[0005] The object of the present invention is achieved in this way: a large-span integrated bracket structure supporting complex loads, including a crane beam, a factory roof beam and a factory column, wherein the crane beam adopts a bracket structure integrated with the main truss, the crane beam is supported on the straight web of the main truss, the bracket structure is supported on the factory columns on both sides, and the factory roof beam is supported on the upper chord of the main truss, and the main truss is composed of an upper chord, an inclined web, a straight web and a lower chord; the crane beam is a box-type structure composed of a web, a horizontal brake plate, a lower flange horizontal support, a vertical support and an upper flange and a lower flange; the horizontal brake plate is connected to the upper flange at both ends of the crane beam as a whole; the lower flange horizontal support is connected to the lower flange at both ends of the crane beam as a whole.

[0006] The crane beam is a multi-span continuous beam and is supported on the corbels extended from the straight web bars.

[0007] The upper chord rod supports the integrated bracket structure on the plant column through the upper chord support.

[0008] The lower chord rod supports the integrated bracket structure on the plant column through the lower chord support.

[0009] The upper flange of the crane beam is connected to the straight web by an LB-1 connecting plate.

[0010] The horizontal brake plate is connected to the transverse stiffening rib plate of the straight web member.

[0011] The diagonal web member is connected with the upper chord member, the lower chord member and the straight web member by using a node connection steel plate with a circular arc transition.

[0012] Compared with the prior art, the present invention has the following significant technical advances and advantages:

[0013] 1) The integrated truss structure has reasonable stress

[0014] The integrated bracket can fully meet the stress requirements of the roof and crane at large column spacing from the perspective of stress performance, and the structure is safe and reliable. The traditional stress-bearing method is that the crane beam and the roof joist structure at large column spacing are independent of each other, and two large-span structures are used to bear stress respectively. The present invention uses a large-span integrated bracket and multiple small-span crane beams to bear stress, which is completely different from the traditional structural stress-bearing method.

[0015] 2) Integrated truss structure saves steel

[0016] Since the crane load is very large, the large-span crane beam used in the traditional structural scheme uses a very large amount of steel. The present invention changes the large-span crane beam into a multi-span small-span continuous crane beam, which greatly reduces the steel consumption of the crane beam. The small-span crane beam is supported on an integrated bracket, and the crane load is converted to be borne by the large-span integrated bracket. Since the upper chord of the integrated bracket is set under the roof beam, the height of the truss is very high, and its bearing capacity and rigidity are also correspondingly large, but the steel consumption of the large-span integrated bracket is indeed low, and the large-span roof joist beam is also omitted. According to statistical calculations, the integrated bracket scheme reduces the structural steel consumption by 30~35% compared with the traditional large-span crane beam and large-span roof joist scheme, and the structural engineering cost is also reduced accordingly.

[0017] 3) The integrated bracket is easy to manufacture, process and install, and the construction period is short

[0018] The integrated bracket can be hoisted as a whole at the factory production site, and the installation workload is small. The main truss and crane beam system in the integrated bracket are common structural components, which are simple and easy to process and manufacture. The steel material adopts Q235B and Q355B grade steel commonly used in the market. The integrated bracket solution has a shorter on-site construction period than the traditional solution. The traditional solution needs to hoist the large-span crane beam and the large-span roof support beam separately at the construction site in two times, and large-scale hoisting machinery needs to enter the site for construction twice. After the integrated bracket is manufactured in the factory, the present invention can complete the hoisting work at the construction site in one time, and the construction period can be reduced by about 30%, which is more efficient.

[0019] 4) Integrated truss structure is safe and reliable

[0020] The integrated bracket solution is a safe and reliable structural form. The vertical and horizontal loads borne by the integrated bracket have clear and definite force transmission paths. The cross-sectional specifications of the structural members can be accurately calculated according to the magnitude of the force. The structural safety is guaranteed and can meet the safety requirements of the structural design standards and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the crane beam structure;

[0023] Figure 3 It is a structural schematic diagram of the connection node between the crane beam and the straight web member;

[0024] Figure 4 It is a structural diagram of the connection node between the upper chord and the plant column;

[0025] Figure 5 It is a structural diagram of the connection node between the lower chord and the plant column;

[0026] Figure 6 It is a structural schematic diagram of the connection node between the upper chord and the roof beam of the factory building;

[0027] Figure 7 for Figure 6 1-1 sectional view;

[0028] Figure 8 It is a structural schematic diagram of the connection node between the upper part of the crane beam and the straight web member;

[0029] Fig. 9 It is a schematic diagram of the structure of the connection node between the upper chord and the straight web member and the diagonal web member;

[0030] Fig.10 It is a structural schematic diagram of the connection node between the lower chord and the straight web member and the diagonal web member;

[0031] Fig.11This is a schematic diagram of the cross section for calculating the horizontal stiffness of the crane beam system;

[0032] Fig.12 Schematic diagram of the calculated section of the horizontal brake beam of the crane beam system. DETAILED DESCRIPTION

[0033] The present invention is further described and explained below by taking a thin plate center workshop of a shipyard as an example:

[0034] Example 1

[0035] The plant has a construction area of ​​54386m2, with three spans of 39m, 36m and 36m. Two 32t bridge cranes are installed in the first span of the plant, and two 20t bridge cranes are installed in the other spans. The rail top elevation is 14m, and the working level is A5. The standard column spacing of the plant is 12m, and the middle part is partially drawn to form a large column spacing of 41.4m. The invention is set at the large column spacing of the columns in the two longitudinal columns of the plant. The production and related parameters of the main truss 1 of the integrated bracket structure are as follows:

[0036] See attached Figure 1 The present invention comprises: a crane beam 2, a factory roof beam 4 and a factory column 5. The crane beam 2 adopts a bracket structure integrated with the main truss 1, and the crane beam 2 is supported on the straight web member 7 of the main truss 1. The bracket structure is supported on the factory columns 5 on both sides. The factory roof beam 4 is supported on the upper chord 3 of the main truss 1. The main truss 1 is composed of an upper chord 3, an oblique web member 6, a straight web member 7, a lower chord member 8 and a corbel 15 extending from the straight web member 7; the integrated bracket structure consists of two parts, the main truss 1 and the crane beam 2, and its main function is to support the factory roof beam 4 and the crane beam 2 at the large column spacing.

[0037] The main truss 1 is used to bear the vertical loads of the factory roof beams 4 and the crane beams 2. The factory roof beams 4 at the column withdrawal location are supported on the connection nodes of the upper chord 3 of the main truss 1, and the roof load in the large column spacing area is transmitted to the upper chord node of the main truss 1. The vertical load of the crane is transmitted to the main truss 1 through the corbels 15 extended from the crane beams 2 and the straight webs 7 of the main truss 1. The main truss 1 transmits the vertical load to the factory columns 5 through the upper and lower chord supports 16 and 17 arranged at both ends of the upper chord 3 and the lower chord 8. The lateral horizontal braking force of the crane is transmitted to the factory columns 5 on both sides of the large column spacing through the brake beam formed by the upper flanges 13 of the two crane beams 2 and the horizontal brake plates 10; the upper chord 3 of the main truss 1 relies on the rigidity provided by the roof beam 4 and the roof support system to ensure its lateral stability; the crane beam 2 is close to the lower chord 8 of the main truss 1, and the lower chord 8 can use the larger horizontal rigidity of the crane beam 2 to ensure its lateral stability.

[0038] See attached Figure 2This figure illustrates the composition of the components of the crane beam system and their relative positions. The crane beam 2 is a multi-span continuous beam consisting of an upper flange 13, a lower flange 14, a web 9, a horizontal brake plate 10, a lower flange horizontal support 11 and a vertical support 12. The crane beam 2 is supported by a corbel 15 protruding from the straight web 7 of the main truss 1 and the plant columns 5 on both sides; the crane beams 2 on both sides of the main truss 1 and the horizontal brake plates 10, the lower flange horizontal supports 11 and the vertical supports 12 together form a box-type structure with great rigidity; the horizontal brake plates 10 are connected to the upper flanges 13 at both ends of the crane beam 2 as a whole; the lower flange horizontal supports 11 are connected to the lower flanges 14 at both ends of the crane beam 2 as a whole. The horizontal brake plate 10 is supported on the crane beam 2 and is connected to the upper flange 13 of the crane beam 2 as a whole, resisting the lateral horizontal braking force of the crane and ensuring the stability of the upper flange 13 of the crane beam 2; the lower flange horizontal support 11 is connected to the lower flange 14 of the crane beam 2 to ensure the stability of the lower flange 14 of the crane beam 2; the vertical support 12 is connected to the web stiffening rib of the crane beam 2 to improve the torsional resistance of the crane beam.

[0039] See attached Figure 3 This figure shows the connection relationship between the straight web member 7 of the integrated bracket structure and the crane beam 2 and the factory roof beam 4. The crane beam 2 is supported on the corbel 15 extended from the straight web member 7, transferring the vertical load of the crane to the straight web member 7; the upper flange 13 of the crane beam 2 is connected to the straight web member 7 through the LB-1 connecting plate 18, transferring the lateral braking force of the crane; the web stiffening rib of the crane beam 2 is connected to the straight web member 7 through the support 21, improving the integrity between the crane beam 2 and the straight web member 7, and the factory roof beam 4 is supported at the node of the upper chord 3, transferring the roof load to the integrated bracket.

[0040] See attached Figure 4 This figure illustrates the connection relationship between the upper chord rod 3 of the integrated bracket structure and the factory column 5, that is, the upper chord support 16 of the integrated bracket structure, through which the load on the bracket is transmitted to the support plate of the factory column 5.

[0041] See attached Figure 5 This figure illustrates the connection relationship between the lower chord rod 8 of the integrated bracket structure and the plant column 5, that is, the lower chord support 17 of the integrated bracket structure. The lower chord rod 8 is connected to the support of the plant column 5. Here, the lower chord rod 8 is a zero rod. The lower chord support 17 is mainly used to ensure the stability of the bracket and does not transmit the bracket load.

[0042] See attached Figure 6~Figure 7 This figure shows the connection relationship between the factory roof beam 4 and the upper chord rod 3 of the integrated bracket structure. The factory roof beam 4 is supported on the upper chord rod 3 of the integrated bracket structure and is located at the node of the straight web member 7.

[0043] See attached Figure 8 This figure illustrates the connection relationship between the upper components of the crane beam system and the straight web member 7 of the integrated bracket structure. The upper flange 13 of the crane beam 2 is connected to the straight web member 7 through the LB-1 connecting plate 18; the horizontal brake plate 10 is connected to the straight web member 7 through the transverse stiffening rib plate 19 of the straight web member 7, transmitting the horizontal braking force of the crane beam 2 to the integrated bracket structure.

[0044] See attached Fig. 9 This figure shows the node structure of the upper chord 3, the straight web 7 and the diagonal web 6 of the integrated bracket structure. The arc transition is used at the corner of the node connecting steel plate 20, which can effectively reduce the stress concentration phenomenon of the node plate.

[0045] See attached Fig.10 This figure shows the node structure of the lower chord 8, the straight web 7 and the diagonal web 6 of the integrated bracket structure. The arc transition is used at the corner of the node connecting steel plate 20, which can effectively reduce the stress concentration phenomenon of the node plate.

[0046] See attached Fig.11 This figure shows the cross-sectional contents considered when calculating the horizontal stiffness of the crane beam system, namely, the upper flange 13, lower flange 14, web 9 section and horizontal brake plate 10 section of the crane beam 2. Among them, P is the horizontal force generated by the torsion of the crane on one side of the integrated bracket.

[0047] See attached Fig.12 This figure shows the cross-sectional contents considered when calculating the horizontal brake beam of the crane beam 2, namely, the cross-sectional areas of the upper flange 13 of the crane beam 2 and the cross-sectional areas of the horizontal brake plate 10. Among them, F is the horizontal brake force of the crane.

[0048] Compared with the traditional structural scheme, the present invention reduces the amount of structural steel by about 80 t (of which the GTJ42-1 integrated truss reduces by 42 t, and the GTJ42-2 integrated bracket reduces by 38 t), and the cost of the structural engineering is reduced by about RMB 800,000. It operates smoothly, is safe and reliable, has advanced technology, and is economically reasonable. The above is only a further explanation of the present invention, and is not intended to limit the patent of the present invention. All equivalent implementations of the present invention should be included in the scope of the claims of the patent of the present invention.

Claims

1. A large-span integrated bracket structure supporting complex loads, including crane beams, factory roof beams and factory columns, characterized in that The crane beam adopts a bracket structure integrated with the main truss, and the crane beam is supported on the straight web of the main truss. The bracket structure is supported on the factory building columns on both sides, and the factory building roof beam is supported on the upper chord of the main truss. The main truss is composed of an upper chord, an inclined web, a straight web and a lower chord; the crane beam is a box-type structure composed of a web, a horizontal brake plate, a lower flange horizontal support, a vertical support, an upper flange and a lower flange; the horizontal brake plate is connected to the upper flange at both ends of the crane beam as a whole; the lower flange horizontal support is connected to the lower flange at both ends of the crane beam as a whole; the crane beam is a multi-span continuous beam, and is supported on the corbels raised by the straight web; the upper flange of the crane beam is connected to the straight web by an LB-1 connecting plate; The horizontal brake plate is connected to the transverse stiffening rib plate of the straight web, and transmits the horizontal brake force of the crane beam to the integrated bracket structure.

2. The large-span integrated bracket structure supporting complex loads according to claim 1 is characterized in that The upper chord rod supports the integrated bracket structure on the plant column through the upper chord support.

3. The large-span integrated bracket structure supporting complex loads according to claim 1 is characterized in that The lower chord rod supports the integrated bracket structure on the plant column through the lower chord support.

4. The large-span integrated bracket structure supporting complex loads according to claim 1 is characterized in that The diagonal web member is connected with the upper chord member, the lower chord member and the straight web member by using a node connection steel plate with a circular arc transition.

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