CN113914456A - Large-span integrated bracket structure for supporting complex load - Google Patents
Large-span integrated bracket structure for supporting complex load Download PDFInfo
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- CN113914456A CN113914456A CN202111383440.6A CN202111383440A CN113914456A CN 113914456 A CN113914456 A CN 113914456A CN 202111383440 A CN202111383440 A CN 202111383440A CN 113914456 A CN113914456 A CN 113914456A
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- bracket structure
- crane beam
- crane
- supported
- main truss
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a large-span integrated bracket structure for supporting complex load, which is characterized in that a crane beam adopts a bracket structure integrated with a main truss, the crane beam is supported on a straight web member of the main truss, the bracket structure is supported on factory building columns on two sides, a factory building roof beam is supported on an upper chord member of the main truss, and the main truss consists of an upper chord member, an inclined web member, a straight web member and a lower chord member; the crane beam is a box-shaped structure consisting of a web plate, 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 invention has the advantages of simple structure, integral hoisting on site, small installation workload and the like, and provides a novel solution which is safe, reliable, low in steel consumption, good in economical efficiency and short in site installation period for structural design.
Description
Technical Field
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
The single-layer industrial factory building provided with the crane often has the condition that a large column distance is formed by locally pulling columns, the traditional structural solution at the large column distance is to arrange a joist to support a transverse roof beam at the column top along the longitudinal direction, a large-span crane beam is arranged on a column bracket, and the span of the crane beam is the same as the large column distance. The structure has the advantages of clear stress, clear force transmission path, safety and reliability; the defects are that the steel amount of the structure is larger, the construction cost is higher, and the field construction installation period is longer.
For single-storey plants provided with cranes, the structural solutions of the prior art mainly present the following drawbacks: 1) the crane beam structure at the position with larger column distance has large steel amount and higher structural engineering cost; 2) the height of the cross section is high, so that the production and use heights of the crane beam bottom are limited to a certain extent; 3) the large-column-distance column is provided with a joist at the top, and the field installation period is long.
Disclosure of Invention
The invention aims to provide a large-span integrated bracket structure capable of supporting complex loads, which is designed aiming at the defects of the prior art, and adopts a truss structure that a main truss transfers vertical loads to a column through supports arranged at two ends of an upper chord member and a lower chord member, the roof loads in a large column distance area are transferred to an upper chord node of the main truss to bear the vertical loads transferred by a roof beam and a crane beam, the roof beam at a column drawing position is supported on the upper chord node of the main truss, the vertical loads of a crane are transferred to the main truss through brackets picked out from the crane beam and a straight web member of the main truss, the horizontal braking force of the crane is transferred to plant columns at two sides of the large column distance through braking beams formed by upper flanges of the two crane beams and a horizontal braking plate, so that the use and stress requirements of engineering are met, the structure is simple, the engineering cost is low, and a safe, reliable, steel-saving and high-cost structure design is provided, The economic efficiency is good, and the field installation period is short.
The purpose of the invention is realized as follows: a large-span integrated bracket structure for supporting complex loads comprises a crane beam, a plant roof beam and plant pillars, and is characterized in that the crane beam adopts a bracket structure integrated with a main truss, the crane beam is supported on a straight web member of the main truss, the bracket structure is supported on the plant pillars on two sides, the plant roof beam is supported on an upper chord member of the main truss, and the main truss is composed of an upper chord member, an inclined web member, a straight web member and a lower chord member; the crane beam is a box-shaped structure consisting of a web plate, 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 with the upper flanges at the two ends of the crane beam into a whole; the lower flange horizontal support is connected with the lower flanges at the two ends of the crane beam into a whole.
The crane beam is a multi-span continuous beam and is supported on a bracket which is pulled out by a straight web lever.
The upper chord supports support the integrated bracket structure on the plant-room column.
The lower chord supports support the integrated bracket structure on the plant-room column.
The upper flange of the crane beam is connected with the straight web rod through an LB-1 connecting plate.
The horizontal brake plate is connected with the transverse stiffening rib plate of the straight web member.
The oblique web members are connected with the upper chord member, the lower chord member and the straight web members through arc transition node connecting steel plates.
Compared with the prior art, the invention has the following remarkable technical progress and advantages:
1) integrated truss structure is forced rationally
The integrated bracket can completely meet the stress requirements of a roof and a crane at a large column distance from the stress performance, and the structure is safe and reliable. The traditional stress mode is that the crane beam at the large column distance and the roof joist structure are independent respectively, and two large-span structures are adopted for stress respectively.
2) Steel-saving material of integrated truss structure
Because the crane load is very large, the steel consumption of the crane beam with the large span adopted by the traditional structural scheme is very large, and the crane beam with the large span is changed into a multi-span continuous crane beam with the small span, so that the steel consumption of the crane beam is greatly reduced. The integrated bracket has the advantages that the small-span crane beam is supported on the integrated bracket, crane load is converted into load borne by the large-span integrated bracket, the upper chord of the integrated bracket is arranged below the roof beam, the height of the truss is very high, the bearing capacity and the rigidity are correspondingly very large, but the steel consumption of the large-span integrated bracket is lower, the large-span roof joist is omitted, the steel consumption of the integrated bracket scheme is reduced by 30-35% compared with that of the structural steel of the traditional large-span crane beam and large-span roof joist scheme through statistical calculation, and the structural engineering cost is correspondingly reduced.
3) The integrated bracket is convenient to manufacture, process and install, and the construction period is short
The integrated bracket can be integrally hoisted on the manufacturing site of a factory, the installation workload is small, the main truss and the crane beam system in the integrated bracket are common structural members, the processing and the manufacturing are simple and easy, and the steel material adopts Q235B and Q355B grade steel materials which are commonly used in the market. The integrated bracket scheme is shorter than the field construction period of the traditional scheme, the traditional scheme is required to respectively hoist the large-span crane beam and the large-span roof joist twice on the construction field, and the large-scale hoisting machinery is required to carry out the entrance construction twice. According to the invention, after the integrated bracket is manufactured in a workshop, the hoisting work of a construction site can be completed only once, the construction period can be reduced by about 30%, and the efficiency is higher.
4) Integrated truss structure safe and reliable
The integrated bracket scheme is a safe and reliable structural form, the force transmission paths of vertical load and horizontal load born by the integrated bracket are clear and definite, the section specification of a structural member can be accurately calculated according to the stress size, the structure is safe and guaranteed, and the requirements of structural design standards and specifications on safety can be met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a crane beam configuration;
FIG. 3 is a schematic structural view of a connecting joint of a crane beam and a straight web rod;
FIG. 4 is a schematic structural view of a connecting node of an upper chord and a plant building column;
FIG. 5 is a schematic structural view of a connecting node of a lower chord and a plant building column;
FIG. 6 is a schematic structural view of a connecting node of an upper chord and a plant roof girder;
FIG. 7 is a cross-sectional view taken along line 1-1 of FIG. 6;
FIG. 8 is a schematic structural view of a connecting joint between the upper part of a crane beam and a straight web rod;
FIG. 9 is a schematic structural view of a connecting joint of the upper chord member, the straight web member and the diagonal web member;
FIG. 10 is a schematic structural view of a connecting joint of a lower chord member, a straight web member and an inclined web member;
FIG. 11 is a schematic cross-sectional view of a crane beam system horizontal stiffness calculation;
fig. 12 is a schematic view of a calculated cross section of a horizontal brake beam of the crane beam system.
Detailed Description
The invention will be described and illustrated in further detail below, taking the thin-plate central factory building of a shipyard as an example:
example 1
The building area of the factory building is 54386m2, the three-span is 39m, 36m and 36m, two bridge cranes with the lifting capacity of 32t are arranged in the first span of the factory building, two bridge cranes with the lifting capacity of 20t are arranged in the rest spans, the rail top is 14m, and the working grade is A5. The standard column spacing of a factory building is 12m, the large column spacing of 41.4m is formed by locally drawing columns in the middle part, the invention is arranged at the large column spacing of locally drawing columns in the middle columns of two longitudinal column rows of the factory building, and the manufacture and related parameters of the main truss 1 of the integrated bracket structure are as follows:
referring to fig. 1, the present invention comprises: the crane girder comprises a crane girder 2, a factory building roof girder 4 and factory building pillars 5, wherein the crane girder 2 adopts a bracket structure integrated with a main truss 1, the crane girder 2 is supported on a straight web member 7 of the main truss 1, the bracket structure is supported on the factory building pillars 5 at two sides, the factory building roof girder 4 is supported on an upper chord member 3 of the main truss 1, and the main truss 1 consists of an upper chord member 3, an inclined web member 6, a straight web member 7, a lower chord member 8 and a bracket 15 raised from the straight web member 7; the integrated bracket structure consists of a main truss 1 and a crane beam 2, and has the main function of supporting a plant roof beam 4 and the crane beam 2 at a large column distance.
The main truss 1 is used for bearing vertical loads of a plant roof beam 4 and a crane beam 2, the plant roof beam 4 at a column drawing position is supported on a connecting node of an upper chord 3 of the main truss 1, the roof load of a large-column-distance area is transmitted to an upper chord node of the main truss 1, the vertical load of a crane is transmitted to the main truss 1 through a bracket 15 which is picked out from the crane beam 2 and a straight web member 7 of the main truss 1, and the vertical load is transmitted to a plant column 5 through upper chord supports 16 and lower chord supports 17 which are arranged at two ends of the upper chord 3 and the lower chord 8 of the main truss 1. The horizontal braking force of the crane is transmitted to the factory building columns 5 on two sides of the large column distance through the braking beams formed by the upper flanges 13 of the two crane beams 2 and the horizontal braking plates 10; the upper chord 3 of the main truss 1 ensures the lateral stability thereof by means of the rigidity provided by the roof girder 4 and the roof support system; the crane beam 2 is close to the lower chord 8 of the main truss 1, and the lower chord 8 can ensure the lateral stability of the crane beam 2 by utilizing the larger horizontal rigidity of the crane beam.
Referring to fig. 2, the present figure illustrates the composition of crane beam system components and their mutual position relationship, the crane beam 2 is a multi-span continuous beam composed 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 takes a bracket 15 picked out from a straight web rod 7 of a main truss 1 and plant building columns 5 at two sides as supports; the crane beams 2 on the two sides of the main truss 1, the horizontal brake plate 10, the lower flange horizontal support 11 and the vertical support 12 form a box-type structure with high rigidity; the horizontal brake plate 10 is connected with the upper flanges 13 at the two ends of the crane beam 2 into a whole; the lower flange horizontal supports 11 are connected with lower flanges 14 at two ends of the crane beam 2 into a whole. The horizontal brake plate 10 is supported on the crane beam 2 and is connected with the upper flange 13 of the crane beam 2 into a whole to resist the horizontal braking force of the crane in the transverse direction and ensure the stability of the upper flange 13 of the crane beam 2; the lower flange horizontal support 11 is connected with a lower flange 14 of the crane beam 2, so that the stability of the lower flange 14 of the crane beam 2 is ensured; the vertical supports 12 are connected with web stiffening ribs of the crane beam 2, so that the torsion resistance of the crane beam is improved.
Referring to fig. 3, the connection relationship between the straight web 7 of the integrated bracket structure and the crane girder 2 and the plant roof girder 4 is illustrated. The crane beam 2 is supported on a bracket 15 which is pulled out by the straight web rod 7, and the vertical load of the crane is transferred to the straight web rod 7; the upper flange 13 of the crane beam 2 is connected with the straight web member 7 through an LB-1 connecting plate 18 to transfer the transverse braking force of the crane; the web stiffening rib of crane beam 2 is supported 21 through the support and is linked to each other with straight web member 7, improves the wholeness between crane beam 2 and straight web member 7, and factory building roof beam 4 supports the node of last chord member 3, transmits roofing load to the integration bracket on.
Referring to fig. 4, the connection relationship between the upper chord 3 and the plant-building column 5 of the integrated bracket structure is shown, that is, the upper chord support 16 of the integrated bracket structure is used for transmitting the load on the bracket to the support plate of the plant-building column 5 through the upper chord support 16.
Referring to fig. 5, the figure shows the connection relationship between the lower chord 8 of the integrated bracket structure and the plant-building column 5, that is, the lower chord support 17 of the integrated bracket structure is used, the lower chord 8 is connected to the support of the plant-building column 5, the lower chord 8 belongs to a zero rod, and the lower chord support 17 is mainly used for ensuring the stability of the bracket and not transmitting the load of the bracket.
Referring to the attached drawings 6-7, the connection relationship between the plant roof girder 4 and the upper chord 3 of the integrated bracket structure is shown, and the plant roof girder 4 is supported on the upper chord 3 of the integrated bracket structure and is positioned at the node of the straight web member 7.
Referring to fig. 8, which illustrates the connection of the upper member of the crane beam system to 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 by an LB-1 connecting plate 18; the horizontal brake plate 10 is connected to the straight web 7 via the transverse stiffening ribs 19 of the straight web 7 to transmit the horizontal braking force of the crane beam 2 to the integrated bracket structure.
Referring to fig. 9, the present invention illustrates a node structure of the upper chord 3, the straight web member 7 and the diagonal web member 6 of the integrated bracket structure, and the stress concentration of the node plate can be effectively reduced by adopting the arc transition at the corner of the node connecting steel plate 20.
Referring to fig. 10, the present invention illustrates a node structure of a lower chord 8, a straight web member 7 and a diagonal web member 6 of an integrated bracket structure, and a stress concentration phenomenon of a node plate can be effectively reduced by adopting a circular arc transition at a corner of a node connecting steel plate 20.
Referring to fig. 11, this figure illustrates the cross-sectional content considered in calculating the horizontal stiffness of a crane beam system, i.e. considering the upper flange 13, lower flange 14, web 9 cross-section and horizontal brake plate 10 cross-section of the crane beam 2. Wherein, P is the horizontal force generated by torsion when the crane is used for one side of the integrated bracket.
Referring to fig. 12, this figure illustrates the cross-sectional content considered in making the horizontal brake beam calculation for the crane beam 2, i.e., the upper flange 13 cross-section and the horizontal brake plate 10 cross-section of the crane beam 2. Wherein F is the horizontal braking force of the crane.
Compared with the traditional structural scheme, the steel amount of the structure is reduced by about 80 t (wherein the GTJ42-1 integrated truss is reduced by 42t, and the GTJ42-2 integrated bracket is reduced by 38 t), the structural engineering cost is reduced by about 80 ten thousand yuan RMB, and the structure has the advantages of stable operation, safety, reliability, advanced technology, economy and reasonability. The invention is further described and not intended to be limited to the specific embodiments disclosed, but rather, the invention is to be accorded the full scope and equivalents thereof.
Claims (7)
1. A large-span integrated bracket structure for supporting complex loads comprises a crane beam, a plant roof beam and plant columns, and is characterized in that the crane beam adopts a bracket structure integrated with a main truss, the crane beam is supported on a straight web member of the main truss, the bracket structure is supported on the plant columns on two sides, the plant roof beam is supported on an upper chord member of the main truss, and the main truss consists of an upper chord member, an inclined web member, a straight web member and a lower chord member; the crane beam is a box-shaped structure consisting of a web plate, 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 with the upper flanges at the two ends of the crane beam into a whole; the lower flange horizontal support is connected with the lower flanges at the two ends of the crane beam into a whole.
2. The large span integrated bracket structure for supporting complex loads according to claim 1, wherein the crane beam is a multi-span continuous beam and is supported on a bracket kicked out by a straight web lever.
3. The large span integrated bracket structure for supporting complex loads according to claim 1, wherein said upper chord is supported by an upper chord support to support the integrated bracket structure on the factory building column.
4. The large span integrated bracket structure for supporting complex loads according to claim 1, wherein said lower chord is supported by a lower chord support to support the integrated bracket structure on a factory building column.
5. The large span integrated carrier structure for supporting complex loads according to claim 1, wherein the horizontal braking plate is connected with the transverse stiffener of the straight web member.
6. The large-span integrated bracket structure for supporting complex loads according to claim 1, wherein the diagonal web members are connected with the upper chord member (3), the lower chord member and the straight web members by using node connecting steel plates with arc transition.
7. A large span integrated bracket structure for supporting complex loads according to claim 1 or claim 2, wherein the upper flanges of the crane beams are connected with straight web rods by LB-1 connecting plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383440.6A CN113914456A (en) | 2021-11-22 | 2021-11-22 | Large-span integrated bracket structure for supporting complex load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383440.6A CN113914456A (en) | 2021-11-22 | 2021-11-22 | Large-span integrated bracket structure for supporting complex load |
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| Publication Number | Publication Date |
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| CN113914456A true CN113914456A (en) | 2022-01-11 |
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| CN202111383440.6A Pending CN113914456A (en) | 2021-11-22 | 2021-11-22 | Large-span integrated bracket structure for supporting complex load |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290957A (en) * | 2023-04-28 | 2023-06-23 | 中冶京诚工程技术有限公司 | Large column spacing factory building structure |
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2021
- 2021-11-22 CN CN202111383440.6A patent/CN113914456A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290957A (en) * | 2023-04-28 | 2023-06-23 | 中冶京诚工程技术有限公司 | Large column spacing factory building structure |
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