CN114412063B - Composite truss string structure system of large-span roof - Google Patents
Composite truss string structure system of large-span roof Download PDFInfo
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- CN114412063B CN114412063B CN202111574584.XA CN202111574584A CN114412063B CN 114412063 B CN114412063 B CN 114412063B CN 202111574584 A CN202111574584 A CN 202111574584A CN 114412063 B CN114412063 B CN 114412063B
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- composite
- cable clamp
- lower chord
- composite cable
- node
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Classifications
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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
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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 application provides a composite string truss structure system of a large-span roof, which comprises an upper chord member, a lower chord member, support nodes, a plurality of composite cable clamp nodes and a plurality of support rods, wherein the upper chord member is fixedly connected with the composite cable clamp nodes through the support rods, the lower chord member and the lower chord member are fixedly connected through the composite cable clamp nodes, the support nodes are positioned at two ends of the upper chord member, two ends of the lower chord member are connected with the support nodes, and the lower chord member is anchored at two ends of the composite string truss structure system. The lower chord and the lower chord are connected by adopting the composite cable clamp node to form the lower chord composite cable rod system, the lower chord is exposed out of the lower chord and is arranged side by side with the lower chord, the structure is compact, the lower chord composite cable rod system can effectively increase the integral rigidity of the structure system, the composite truss structure has small sagittal height, and the indoor effect of the building is good.
Description
Technical Field
The application belongs to the field of building structures, and particularly relates to a composite truss string structure system of a large-span roof.
Background
In recent years, the large-span roof structure develops rapidly and is widely applied to large-scale marked public buildings such as exhibition halls, stadiums, exhibition centers, airport terminal buildings and the like, and the structural forms of the large-span roof structure comprise a thin shell structure, a grid structure, a net shell structure, a cable truss structure, a suspension cable structure, a film structure and the like. For a house cover of a public building of a exhibition type, the main structural system at present comprises the following components:
in the first mode, as shown in fig. 2, the truss structure system comprises an upper chord, a lower chord and a web member;
in the first mode, as shown in fig. 3, the single-beam chord structure system comprises an upper chord, a lower chord and a brace;
in the second mode, as shown in fig. 4, the single truss structure system includes an upper truss, a lower chord, and a brace.
The three modes are widely applied to the large-span roof structures of various exhibition centers, and have obvious defects or shortcomings although the three modes have respective advantages.
Disclosure of Invention
The application provides a composite string truss structure system of a large-span roof, which utilizes building materials to resist vertical load and wind suction.
The application provides a composite string truss structure system of a large-span roof, which comprises an upper chord member, a lower chord member, support nodes, a plurality of composite cable clamp nodes and a plurality of support rods, wherein the upper chord member is fixedly connected with the composite cable clamp nodes through the support rods, the lower chord member and the lower chord member are fixedly connected through the composite cable clamp nodes, the support nodes are positioned at two ends of the upper chord member, two ends of the lower chord member are connected with the support nodes, and the lower chord member is anchored at two ends of the composite string truss structure system.
Further, the composite cable clamp node comprises an upper composite cable clamp node cover plate and a lower composite cable clamp node cover plate, the stay bars are connected with the upper composite cable clamp node cover plate, the upper composite cable clamp node cover plate and the lower composite cable clamp node cover plate are fixedly connected, and the lower chord cable is arranged between the upper composite cable clamp node cover plate and the lower composite cable clamp node cover plate.
Furthermore, the upper cover plate of the composite cable clamp node and the lower cover plate of the composite cable clamp node are fixedly connected through high-strength bolts.
Further, an overhanging lug plate is arranged on the composite cable clamp node, and the stay bar is hinged with the overhanging lug plate.
Still further, still be equipped with the stay bar tip shrouding in stay bar and compound cable clamp node junction, be equipped with the stay bar otic placode on the stay bar tip shrouding, the stay bar otic placode is articulated with overhanging otic placode.
Further, the lower chord rope is a prestressed rope.
Further, two upper chords are arranged, the composite tension chord truss structure system further comprises upper chord straight web members, and the two upper chords are connected through the upper chord straight web members.
Further, the upper chord member is connected with the stay bar in a welding way, and the lower chord member is connected with the composite cable clamp node in a welding way.
Further, the stay bar is a profile steel member.
Further, the composite cable clamp node is a steel casting.
Compared with the prior art, the lower chord composite cable clamp node is adopted to realize the connection of the lower chord and the lower chord, so that the lower chord composite cable rod system is formed, the lower chord is exposed and arranged side by side with the lower chord, the structure is compact, the lower chord composite cable rod system can effectively increase the overall rigidity of the structural system, the composite truss structure has small rise, and the indoor effect of the building is good.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present application;
FIG. 2 is a schematic diagram of a prior art large span roof truss structure system;
FIG. 3 is a schematic diagram of a prior art wide span roof beam chord structure system;
FIG. 4 is a schematic diagram of a prior art wide span roof truss string system;
FIG. 5 is a schematic diagram of a large span roof composite truss string system of the present application;
FIG. 6 is a typical cross-sectional view of the composite chord structural system of FIG. 5;
FIG. 7 is a schematic view of the composite cable clamp node of FIGS. 5 and 6;
FIG. 8 is a schematic diagram II of the composite cable grip node of FIGS. 5 and 6;
FIG. 9 is a schematic diagram of the stress mechanism under the initial state of the structural system (dead weight+prestress action);
FIG. 10 is a schematic diagram of the stress mechanism of the structural system of the present application under normal conditions (vertical loads);
FIG. 11 is a schematic diagram of the stress mechanism of the structural system of the present application under abnormal conditions (typhoon conditions).
A. Composite cable grip nodes; B. a support node; 1. an upper chord; 2. a lower chord; 3. a lower chord; 4. a brace rod; 5. a straight web member is wound; 6. truss web members; a. composite cable clip node upper cover plate; b. a composite cable grip node lower cover plate; c. the composite cable clamp node extends out of the lug plate; d. a pin shaft; e. a stay bar ear plate; f. and sealing plates at the ends of the stay bars.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution of the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
The embodiment of the application discloses a composite tension chord truss structure system of a large-span roof, which is shown in fig. 1-11, and comprises an upper chord member 1, a lower chord member 2, a lower chord member 3, a support node B, a plurality of composite cable clamp nodes A and a plurality of stay bars 4, wherein the upper chord member 1 is fixedly connected with the composite cable clamp nodes A through the stay bars 4, the lower chord member 2 and the lower chord member 3 are fixedly connected with each other through the composite cable clamp nodes A, the support node B is positioned at two ends of the upper chord member 1, two ends of the lower chord member 2 are connected with the support node B, and the lower chord member 3 is anchored at two ends of the composite tension chord truss structure system.
Optionally, the compound cable clamp node a includes compound cable clamp node upper cover plate a, compound cable clamp node lower cover plate b, the vaulting pole 4 links to each other with compound cable clamp node upper cover plate a, compound cable clamp node lower cover plate b are fixed to be connected, down the chord rope 3 install between compound cable clamp node upper cover plate a, compound cable clamp node lower cover plate b.
In particular, a stay bar end sealing plate f is further arranged at the joint of the stay bar 4 and the composite cable clamp node A, a stay bar lug plate e is arranged on the stay bar end sealing plate f, and the stay bar lug plate e is hinged with the outer extending lug plate of the composite cable clamp node.
Optionally, the lower chord rope 3 is a prestressed rope.
Optionally, two upper chords 1 are provided, the composite truss structure system further comprises upper chord straight web members 5, and the two upper chords 1 are connected through the upper chord straight web members 5.
The lower end of the supporting rod 4 extends out of the lug plate from the sealing plate, the supporting rod lug plate e is connected with the composite cable clamp node extending out lug plate c through a pin shaft d, the connection direction of the pin shaft d is along the truss direction, namely, the rotation freedom degree between the lower end of the supporting rod 4 and the lower chord composite cable rod along the truss direction is released, the lower chord 2 is welded with the upper cover plate a of the composite cable clamp node, the lower chord 3 penetrates through the upper cover plate and the lower cover plate of the composite cable clamp node A, the upper chord 1 at the end part of the composite tension chord truss, the lower chord 2 is welded with the support node B, and the lower chord 3 is anchored at the end part of the truss.
The embodiment of the application also has the following preferable design: when the structural column spacing is not large, the fish belly type upper chord double-pole can be combined into an upper chord single-pole, the stay bar 4 is changed into a vertical single stay bar 4 from a V-shaped double stay bar 4, the single stay bar 4 is welded with the upper chord single-pole, and the single stay bar 4 is connected with a composite cable clamp node A through a pin shaft d.
The lower chord rope 3 and the lower chord member 2 of the composite string truss structure system are integrally combined through the composite rope clamp node A, the structure is compact, the appearance is concise and clear, the building space is saved, the indoor building vision of a large-span roof structure is ensured, the deformation of the structure under a normal working condition and a typhoon working condition can be effectively reduced by adopting the composite string truss system, and the structure system is light and has excellent economy. In addition, the composite string truss related by the embodiment of the application is suitable for any of various roof forms such as flat roofs, inclined roofs, arched roofs, drooping roofs and the like, and the structural system has low sensitivity, high redundancy and good robustness on the modeling of the large-span roof.
In the embodiment of the application, three working conditions are mainly considered from a construction state to a use state, (1) an initial working condition is shown in fig. 9, and a lower chord prestressed cable is formed by stretching and is mainly loaded with the self weight of the structure and the prestress cable force; (2) as shown in fig. 10, under the normal working condition, considering the vertical load effect, the main load is the self weight of the structure, the additional constant load, the additional live load and the prestress cable force; (3) the abnormal working condition is shown in fig. 11, and the strong typhoon working condition in coastal areas is considered, wherein the main load is the self weight of the structure, the additional constant load, the strong typhoon suction effect and the prestress cable force.
The concrete explanation is as follows:
under the initial state working condition, as shown in fig. 9, the initial tension of the lower chord prestressed cable enables the composite truss structure to be deformed upwards, the structural system is subjected to internal force redistribution, the lower chord hard rod is pressed, the cable force of the lower chord prestressed cable is slightly reduced, the upper chord hard rod is pulled, and the upward deformation of the structure under the initial state working condition is ensured to be within the standard limit value requirement by adjusting the initial tension value of the lower chord prestressed cable; under the working condition of an initial state, the composite tension chord truss loses the cable force of the lower chord 3 after the internal force of the structure is redistributed under the action of dead weight and prestress cable force, the lower chord 2 is pressed, the whole lower chord composite cable body system is mainly expressed as the tension of the lower chord 3, the upper chord 1 is pressed, and the whole structure system is a self-balancing structure system with one tension and one pressure;
as shown in fig. 10, under the normal working condition, the upward deformation under the initial working condition can offset the downward deformation of part of the vertical load, the whole structure system is in downward deformation, the structure stress state is that the upper chord hard rod is pressed, the lower chord prestress cable force is increased, the lower chord hard rod is pulled, and the whole structure system is balanced in tension and compression; under the normal working condition of the structure system, the composite tension chord truss increases the cable force of the lower chord 3 under the vertical downward acting force of dead weight, additional constant load and live load, and the lower chord composite cable body system mainly shows that the lower chord 3 and the lower chord 2 are pulled together after the internal force of the structure is redistributed, the upper chord 1 is pressed, and the whole structure system is pulled and pressed, so that the structure system is a self-balancing structure system.
As shown in fig. 11, under the abnormal working condition, the structural load is mainly represented by upward wind suction, the structural stress state is represented by the tension of the upper chord hard rod, the compression of the lower chord hard rod, and the cable force of the lower chord prestressed cable is reduced but not loosened; in the abnormal working condition of the structural system, such as strong typhoon load exceeding the self weight of the structure, the model is simplified to apply vertical upward acting force to the composite truss structure, the lower chord 3 rope force is reduced but not loosened, the lower chord composite rope rod body system mainly shows that the lower chord 2 is pressed, the upper chord 1 is pulled, and the whole structural system is pulled and pressed, so that the structural system is a self-balancing structural system.
Compared with the beam chord structure, the beam chord structure has the advantages that when the span and the structural vector height are the same, the beam chord structure is high in structural rigidity, structural deformation can be effectively reduced under the normal working condition (2) and the abnormal working condition (3), and the beam chord structure is particularly suitable for coastal strong typhoons.
Compared with the truss structure with the string, the truss structure has low requirements on the rise and the deformation under the same bearing capacity and deformation requirements, the structural effect is transparent and attractive, and meanwhile, the lower chord member 2 can be provided with hanging points according to requirements, and no blind area is arranged on the indoor hanging points. The diameter of the lower chord member 2 is equal to the equivalent diameter of the lower chord prestressed cable, and the indoor effect is not affected when the lower chord members are placed side by side.
Compared with a truss structure, the embodiment of the application has the advantages that under the condition of the same span and truss height, the structural system has the advantages of slender rod pieces, low steel consumption and small rise, the structural system has excellent economy, and the indoor clear height of a building can be ensured.
In particular, the upper cover plate a of the composite cable clamp node and the lower cover plate b of the composite cable clamp node are fixedly connected through high-strength bolts.
Optionally, an overhanging lug plate is arranged on the composite cable clamp node A, and the stay bar 4 is hinged with the overhanging lug plate.
Optionally, the upper chord member 1 is welded with the stay bar 4, and the lower chord member 2 is welded with the composite cable clamp node A.
Optionally, the stay bar 4 is a profile steel member.
Optionally, the composite cable clip node a is a steel casting.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present application after reading the present specification, and these modifications and variations do not depart from the scope of the application as claimed in the pending claims.
Claims (10)
1. The composite tension chord truss structure system of the large-span roof is characterized by comprising an upper chord member, a lower chord member, support nodes, a plurality of composite cable clamp nodes and a plurality of support rods, wherein the upper chord member is fixedly connected with the composite cable clamp nodes through the support rods, the lower chord member and the lower chord member are fixedly connected through the composite cable clamp nodes, the support nodes are positioned at two ends of the upper chord member, two ends of the lower chord member are connected with the support nodes, and the lower chord member is anchored at two ends of the composite tension chord truss structure system;
the lower chord rope is arranged in the composite rope clamp node.
2. The composite truss string structure system of the large-span roof according to claim 1, wherein the composite cable clamp node comprises a composite cable clamp node upper cover plate and a composite cable clamp node lower cover plate, the stay bar is connected with the composite cable clamp node upper cover plate, the composite cable clamp node upper cover plate and the composite cable clamp node lower cover plate are fixedly connected, and the lower chord cable is arranged between the composite cable clamp node upper cover plate and the composite cable clamp node lower cover plate.
3. The composite truss string structure system of the large-span roof of claim 2, wherein the upper cover plate of the composite cable clamp node and the lower cover plate of the composite cable clamp node are fixedly connected through high-strength bolts.
4. The composite truss string structure system of the large-span roof of claim 1, wherein the composite cable clamp node is provided with an overhanging lug plate, and the stay bar is hinged with the overhanging lug plate.
5. The composite truss string structure system of the large-span roof of claim 4, wherein a stay bar end sealing plate is further arranged at the joint of the stay bar and the composite cable clamp node, and a stay bar lug plate is arranged on the stay bar end sealing plate and hinged with the overhanging lug plate.
6. The composite truss work system of claim 1 wherein the lower chord is a prestressed cable.
7. The composite truss work system of claim 1 wherein there are two upper chords, the composite truss work system further comprising upper straight web members, the two upper chords being connected by the upper straight web members.
8. The composite truss work system of claim 1 wherein the upper chord is welded to the brace and the lower chord is welded to the composite clip node.
9. The composite truss work system of claim 1 wherein the braces are steel members.
10. The composite truss work system of claim 1 wherein the composite cable grip node is a steel casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111574584.XA CN114412063B (en) | 2021-12-21 | 2021-12-21 | Composite truss string structure system of large-span roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111574584.XA CN114412063B (en) | 2021-12-21 | 2021-12-21 | Composite truss string structure system of large-span roof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114412063A CN114412063A (en) | 2022-04-29 |
| CN114412063B true CN114412063B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111574584.XA Active CN114412063B (en) | 2021-12-21 | 2021-12-21 | Composite truss string structure system of large-span roof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837341A (en) * | 2022-06-09 | 2022-08-02 | 江西建工第一建筑有限责任公司 | Steel roof supporting system of truss with open chord and inverted triangular pipe |
| CN114837348A (en) * | 2022-06-09 | 2022-08-02 | 江西建工第一建筑有限责任公司 | Beam string structure |
| CN114837312B (en) * | 2022-06-10 | 2023-07-14 | 亚都建设集团有限公司 | Lower chord lockset node of string-stretching beam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633548A (en) * | 1992-07-11 | 1994-02-08 | Kawasaki Heavy Ind Ltd | Externally tension supporting combined beam |
| CN1609362A (en) * | 2004-10-27 | 2005-04-27 | 贵州大学 | Short-brace rod type expanding-chord truss and producing method thereof |
| CN105569187A (en) * | 2016-01-18 | 2016-05-11 | 江苏沪宁钢机股份有限公司 | Inverted arch beam string structure roof of large-span steel structure and construction method thereof |
| CN110158834A (en) * | 2019-05-07 | 2019-08-23 | 天津大学 | The centripetal double rustling sounds in lower part for beam-string structure support joint system |
| CN110748007A (en) * | 2019-11-22 | 2020-02-04 | 中国建筑第八工程局有限公司 | Prestress inhaul cable connection node structure suitable for pipe truss structure |
-
2021
- 2021-12-21 CN CN202111574584.XA patent/CN114412063B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633548A (en) * | 1992-07-11 | 1994-02-08 | Kawasaki Heavy Ind Ltd | Externally tension supporting combined beam |
| CN1609362A (en) * | 2004-10-27 | 2005-04-27 | 贵州大学 | Short-brace rod type expanding-chord truss and producing method thereof |
| CN105569187A (en) * | 2016-01-18 | 2016-05-11 | 江苏沪宁钢机股份有限公司 | Inverted arch beam string structure roof of large-span steel structure and construction method thereof |
| CN110158834A (en) * | 2019-05-07 | 2019-08-23 | 天津大学 | The centripetal double rustling sounds in lower part for beam-string structure support joint system |
| CN110748007A (en) * | 2019-11-22 | 2020-02-04 | 中国建筑第八工程局有限公司 | Prestress inhaul cable connection node structure suitable for pipe truss structure |
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| CN114412063A (en) | 2022-04-29 |
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