CN219621940U - Partially-coated steel-concrete combined truss - Google Patents
Partially-coated steel-concrete combined truss Download PDFInfo
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- CN219621940U CN219621940U CN202320331131.2U CN202320331131U CN219621940U CN 219621940 U CN219621940 U CN 219621940U CN 202320331131 U CN202320331131 U CN 202320331131U CN 219621940 U CN219621940 U CN 219621940U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The utility model relates to a partially-coated steel-concrete combined truss, which comprises an upper chord member and a lower chord member of a steel structure, and a compression web member and a tension web member which are connected between the upper chord member and the lower chord member and have different inclined directions, wherein the compression web member is filled with concrete for coating, the upper half part of the upper chord member is filled with concrete, and the tension web member is not filled with concrete. The steel-concrete combined truss designed by the utility model adopts a partial cladding mode, utilizes the concrete filled on the pressed component to improve the overall stability, does not need to meet the load design requirement in a mode of increasing the cross-section area, does not influence the overall attractiveness and does not squeeze the space inside the truss, and according to the structure designed by the utility model, the truss has large inner space, and is convenient for arranging an air pipe or a pavement for walking by utilizing the truss inner space.
Description
Technical Field
The utility model relates to the field of steel structure assembly type buildings, in particular to a partially-coated steel-concrete combined truss.
Background
The steel structure truss is a lattice structure, and the chord members and the web members are connected with each other to form a whole so as to achieve the purpose of bending resistance. In comparison with conventional solid web steel beams, in steel structure trusses, most of the bars are only subjected to axial tension or axial compression, which enables the bars to exert their good material properties. On the premise of meeting the requirements of structural strength and rigidity, the steel structure truss can replace a complete web plate with fewer web members, steel is saved, and meanwhile, the weight of the structure is lightened, so that the steel structure truss is favored by structural designers and engineering technicians and is often used in a large-span and load-carrying structural system.
As shown in fig. 1, the steel truss is mainly composed of an upper chord member 1, a lower chord member 2, and web members, wherein the web members are divided into two types having different inclination directions. In the steel structure truss, the upper chord member 1 and the compression web member 3 usually bear larger shaft pressure, the lower chord member 2 and the tension web member 4 bear shaft tension, so that the buckling damage of the compression web member 3 and the tension web member 4 is avoided, the cross section area is often required to be increased to meet the design requirement, the increase of the cross section can lead to the increase of the steel consumption, the manufacturing cost is increased, the increase of the web member cross section is also difficult to meet the building design requirement with high aesthetic degree requirement, and meanwhile, the available space inside the truss is compressed, so that collision interference is easy to occur with the web member when the wind pipe 5 or the horse 6 is required to be arranged inside the truss.
Disclosure of Invention
The utility model discloses a partially coated steel-concrete composite truss, which can avoid web member instability without increasing the cross section of the web member.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the steel-concrete combined truss with the partial coating comprises an upper chord member and a lower chord member of a steel structure, and a compression web member and a tension web member which are connected between the upper chord member and the lower chord member and have different inclination directions, wherein the compression web member is filled with concrete for coating, the upper half part of the upper chord member is filled with concrete, and the tension web member is not filled with concrete.
Further, the upper chord member, the lower chord member, the compression web member and the tension web member are all made of H-shaped steel, the web plates of the upper chord member and the lower chord member are all horizontally distributed, concrete is filled at the top of the web plate of the upper chord member, and concrete is respectively filled at two sides of the web plate of the compression web member.
Further, one end of each of the two side flanges of the pressure-receiving web member is correspondingly welded with the two side flanges of the upper chord member, the other end of each of the two side flanges of the pressure-receiving web member is correspondingly welded with the two side flanges of the lower chord member, one end of the web plate of the pressure-receiving web member is welded on the bottom surface of the web plate of the upper chord member, and the other end of the web plate of the pressure-receiving web member is welded on the top surface of the web plate of the lower chord member; one ends of flanges on two sides of the tension web member are correspondingly welded with flanges on two sides of the upper chord member, the other ends of flanges on two sides of the tension web member are correspondingly welded with flanges on two sides of the lower chord member, one end of a web plate of the tension web member is welded on the bottom surface of a web plate of the upper chord member, and the other end of the web plate of the tension web member is welded on the top surface of the web plate of the lower chord member.
Further, the welding seam of the flange of the compression web member and the upper chord member and the lower chord member is not overlapped with the welding seam of the flange of the tension web member and the upper chord member and the lower chord member.
Further, stirrups and longitudinal steel bars which are perpendicular to each other are arranged between the flanges at the two sides of the upper chord web plate, the two ends of the stirrups are respectively fixed on the flanges at the two sides of the upper chord, the stirrups are tied up or welded with the longitudinal steel bars, the two ends of the upper portion of the upper chord web plate are respectively provided with a baffle plate, the baffle plates are perpendicular to the flanges and the web plate of the upper chord, and the two ends of the longitudinal steel bars are respectively fixed on the baffle plates;
the two sides of the web plate of the pressure web member are respectively provided with stirrups and longitudinal steel bars which are perpendicular to each other, the stirrups on each side of the web plate of the pressure web member are fixed on the flanges of the pressure web member, the two ends of each side of the web plate of the pressure web member are respectively provided with baffle plates, the longitudinal steel bars on each side of the web plate of the pressure web member are fixed on the baffle plates on the same side, and the stirrups on each side of the web plate of the pressure web member are bound or welded with the longitudinal steel bars on the same side.
The steel-concrete combined truss designed by the utility model adopts a partial cladding mode, utilizes the concrete filled on the pressed component to improve the overall stability, does not need to meet the load design requirement in a mode of increasing the cross-section area, does not influence the overall attractiveness and does not squeeze the space inside the truss, and according to the structure designed by the utility model, the truss has large inner space, and is convenient for arranging an air pipe or a pavement for walking by utilizing the truss inner space.
Drawings
FIG. 1 is a schematic view of a steel-concrete composite truss void for use in a roadway or duct;
FIG. 2 is an enlarged schematic view of the node A of FIG. 1;
fig. 3 is a perspective view of the structure before the node a in fig. 1 is not filled with concrete.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
The present embodiment discloses a partially coated steel-concrete composite truss including an upper chord 1, a lower chord 2, and compression web members 3 and tension web members 4 connected between the upper and lower chords with different inclination directions as shown in fig. 1. The structure is a general structure of the prior steel structure truss, and the connection modes between the upper chord member, the lower chord member and the web member are different according to the different shapes of the selected steel members, so that the convenience of specific construction is further influenced.
In this embodiment, in order to simplify the connection of the components and improve the bearing capacity of the components, the upper chord member 1, the lower chord member 2, the compression web member 3 and the tension web member 4 all adopt H-shaped steel with the same height, that is, the H-shaped steel of the four components has the same dimension design, and the specific width and thickness of the H-shaped steel can be determined after calculation according to the stress.
The four members are connected as follows: referring to fig. 2 and 3, when the H-shaped steel serving as the upper chord member 1 is laid, the web plates 1-3 of the upper chord member 1 are ensured to be laid horizontally, the flanges 1-1 and 1-2 on the two sides of the web plates 1-3 are vertical to the ground, so that the upper chord member 1 is convenient to connect with the web plates, and the filling operation of the concrete 9 on the upper half part of the upper chord member 1 is also convenient. The H-shaped steel serving as the lower chord member 2 is arranged in the same direction as the upper chord member 1, and the H-shaped steel serving as the compression web member 3 and the tension web member 4 are required to be coplanar with the flanges of the upper chord member and the lower chord member, so that connection is convenient. Specifically, one end of a flange 3-1 of the pressure-receiving web member 3 is welded with a flange 1-1 of the upper chord member 1, the other end of the flange 3-1 is welded with the same side edge of the lower chord member 2, one end of a flange 3-2 of the pressure-receiving web member 3 is welded with a flange 1-2 of the upper chord member 1, the other end of the flange 3-2 is welded with the same side edge of the lower chord member 2, one end of a web 3-3 of the pressure-receiving web member 3 is welded on the bottom surface of the web 1-3 of the upper chord member 1, and the other end of the web 3-3 of the pressure-receiving web member 3 is welded on the web top surface of the lower chord member 2. The tension web member 4 is connected to the upper and lower chord members in a manner that is described above with reference to the construction of the compression web member 3.
The structure provided by the embodiment is connected by adopting the H-shaped steel, so that the connecting nodes of the web members and the upper chord member and the lower chord member do not need to be provided with a gusset plate, and the structure is greatly simplified. In the combined truss in the prior art, the four components are not always steel components with the same shape and size, so that node plates are required to be additionally arranged when the web members are connected with the upper chord member and the lower chord member, and the complexity of structural design is improved. Just as the patent of the utility model with the publication number of CN216516480U discloses a truss type steel-concrete composite girder, the upper chord member in the patent also adopts H-shaped steel, but the arrangement direction is different from that of the utility model, the flanges of the upper chord member in the patent are parallel, the web member in the patent adopts angle steel or channel steel, the lower chord member adopts T-shaped steel, the web member needs to be welded with the flanges of the upper chord member, and the flange bottom surface of the upper chord member needs to be additionally provided with a gusset plate, so that the structural complexity is increased. In the utility model, the web member adopts H-shaped steel, so that the stress performance is better than that of channel steel or angle steel, and the out-of-plane bearing capacity is better than that of the channel steel or angle steel.
In order to avoid the instability of the web member, the utility model adopts the method of filling concrete on the pressed member to improve the stability under the condition of not increasing the cross section of the web member, and according to the stress analysis, the upper chord member 1 and the pressed web member 3 in the combined truss bear the axial pressure, the lower chord member 2 and the tension web member 4 bear the axial tension, and the instability problem can be solved only by filling the concrete on the pressed member, namely: concrete 9 is poured at the top of the web plates 1-3 of the upper chord member 1 for filling, the concrete 9 is respectively filled at the two sides of the web plates 3-3 of the compression web members 3, and the tension web members 4 do not need to be poured. The concrete on the compression web member 3 can be prefabricated and filled in a factory, and the concrete on the upper half part of the upper chord member 1 can be filled in a construction site.
In this embodiment, the web plates 1-3 of the upper chord member 1 are horizontally arranged, so that the upper half of the upper chord member 1 is conveniently filled with concrete, if the web plates are vertically arranged by adopting the upper chord member with the bulletin number of CN216516480U, concrete needs to be filled at two sides of the web plates of the upper chord member, so that the filling operation workload is high, and the turning operation is needed, and as the web plates 1-3 of the upper chord member 1 are horizontally arranged, the concrete 9 on the web plates 1-3 only needs to be filled on one side, and can be poured together with the concrete of the floor slab or the roof at a construction site, thereby greatly facilitating the construction operation. In the prior art, the upper chord member of some steel-concrete trusses adopts square steel pipes, concrete is filled in the square steel pipes, as in the patent of the utility model with the publication number of CN217601696U, the upper chord member adopts square steel pipes, the lower chord member and the web members adopt H-shaped steel, the three structures are different, the square steel pipes are not provided with openings at two ends, the circumferences of the square steel pipes are closed, the concrete is filled in the square steel pipes very inconvenient, and the quality is uncontrollable.
After the connection of the composite truss according to the present utility model is completed in the above-mentioned connection manner, when the upper chord member 1 is not filled with the concrete 9, the neutral axis of the composite cross section formed by the composite truss is located at the position O shown in fig. 2, and in the composite truss, the neutral axes of the upper chord member 1, the compression web member 3, and the tension web member 4 need to meet at a point, and if the three meet at the point O, the welding seam at the connection position of the compression web member 3 and the upper chord member 1 overlaps with the welding seam at the connection position of the tension web member 4 and the upper chord member 1, thereby affecting the welding operation. When the top of the web plates 1-3 of the upper chord member 1 is filled with the concrete 9, the neutral axis of the combined section moves from the point O shown in fig. 2 to the position X, so that the axes of the compression web plates 3 and the tension web members 4 intersect at the position X, the welding seams of the compression web members 3 and the upper chord member 1 do not overlap with the welding seams of the tension web members 4 and the upper chord member 1, and the welding seams of web member plates are prevented from being concentrated.
Further, after concrete is filled according to the description given above, the stability of the conventional steel structure is solved, the combined section can be made smaller, not only the steel consumption can be saved, the architectural modeling is more attractive, the triangular area in the middle of the web member is larger, and more sufficient space is reserved for the air pipe 5 or the horse 6. The steel structure is generally poor in corrosion and fire resistance, corrosion and fire resistance treatment is needed, and the area, filled and coated by concrete, of the combined truss in the embodiment does not need to be subjected to corrosion and fire resistance coating, so that the manufacturing cost is saved.
When the upper half of the upper chord member 1 is filled with concrete 9, two ends of the top of the web plate 1-3 of the upper chord member 1 are required to be respectively provided with a baffle plate 10, the bottoms of the baffle plates 10 are welded on the top surface of the web plate 1-3, two sides of the baffle plates 10 are respectively welded on the inner walls of the flanges 1-1 and 1-2, the baffle plates 10 are made of steel plates, and the baffle plates 10 and the flanges 1-1 and 1-2 jointly enclose a casting area of the concrete 9. The concrete 9 on both sides of the web 3-3 of the web 3 is filled with the baffle 10, and the baffle 10 is also required to be arranged, and the arrangement of the baffle 10 can be referred to the description of the baffle 10 on the upper half of the upper chord 1.
Further, in order to increase the connection firmness between the filled concrete 9 and the steel member, criss-cross steel bars are also required to be arranged in the filling area, and taking the top filling area of the webs 1-3 of the upper chord member 1 as an example, namely: the steel bars are divided into stirrups 7 perpendicular to the flanges 1-1 and 1-2 and longitudinal steel bars 8 perpendicular to the stirrups 7, a plurality of stirrups 7 and longitudinal steel bars 8 can be arranged at intervals, and the stirrups 7 and the longitudinal steel bars 8 are fixed together in a bundling or welding mode; one end of the stirrup 7 is welded on the inner wall of the flange 1-1, the other end is welded on the inner wall of the flange 1-2, and two ends of the longitudinal steel bar 8 are respectively welded on the baffle 10. After the reinforcing steel bars are arranged in the filling area in the above-mentioned manner, the concrete 9 is filled, so that the concrete 9 and the upper chord member 1 are integrated through the reinforcing steel bars, the upper chord member 1 of the steel member and the concrete 9 can bear force together, and the overall bearing capacity of the member and the truss is improved. For the filling area of the concrete 9 on the compression web 3, the reinforcement arrangement is also required, and reference is made to the reinforcement arrangement at the upper chord 1 given above.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a partly cladding steel-concrete composite truss, includes steel construction's upper chord member, lower chord member and connect and incline different pressurized web member and the tension web member of direction between upper and lower chord member, its characterized in that: the compression web members are coated by filling concrete, the upper half parts of the upper chords are filled with concrete, and the tension web members are not filled with concrete.
2. A partially encased steel-concrete composite truss as defined in claim 1 wherein: the upper chord member, the lower chord member, the compression web member and the tension web member are all made of H-shaped steel, the web plates of the upper chord member and the lower chord member are all horizontally distributed, concrete is filled at the top of the web plate of the upper chord member, and concrete is respectively filled at two sides of the web plate of the compression web member.
3. A partially encased steel-concrete composite truss as defined in claim 2 wherein: one end of each flange on the two sides of the pressed web member is correspondingly welded with the flange on the two sides of the upper chord member, the other end of each flange on the two sides of the pressed web member is correspondingly welded with the flange on the two sides of the lower chord member, one end of the web plate of the pressed web member is welded on the bottom surface of the web plate of the upper chord member, and the other end of the web plate of the pressed web member is welded on the top surface of the web plate of the lower chord member; one ends of flanges on two sides of the tension web member are correspondingly welded with flanges on two sides of the upper chord member, the other ends of flanges on two sides of the tension web member are correspondingly welded with flanges on two sides of the lower chord member, one end of a web plate of the tension web member is welded on the bottom surface of a web plate of the upper chord member, and the other end of the web plate of the tension web member is welded on the top surface of the web plate of the lower chord member.
4. A partially encased steel-concrete composite truss as defined in claim 3 wherein: the welding seam of the flange of the compression web member and the upper chord member and the welding seam of the flange of the tension web member and the welding seam of the upper chord member and the lower chord member are not overlapped.
5. A partially encased steel-concrete composite truss as defined in claim 2 wherein: the upper part of the upper chord web plate is provided with stirrups and longitudinal steel bars which are mutually perpendicular between flanges at two sides, two ends of each stirrup are respectively fixed on flanges at two sides of the upper chord, the stirrups are tied up or welded with the longitudinal steel bars, two ends of the upper part of the upper chord web plate are respectively provided with a baffle plate, the baffle plates are perpendicular to the flanges and the web plates of the upper chord, and two ends of each longitudinal steel bar are respectively fixed on the baffle plates;
the two sides of the web plate of the pressure web member are respectively provided with stirrups and longitudinal steel bars which are perpendicular to each other, the stirrups on each side of the web plate of the pressure web member are fixed on the flanges of the pressure web member, the two ends of each side of the web plate of the pressure web member are respectively provided with baffle plates, the longitudinal steel bars on each side of the web plate of the pressure web member are fixed on the baffle plates on the same side, and the stirrups on each side of the web plate of the pressure web member are bound or welded with the longitudinal steel bars on the same side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331131.2U CN219621940U (en) | 2023-02-28 | 2023-02-28 | Partially-coated steel-concrete combined truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331131.2U CN219621940U (en) | 2023-02-28 | 2023-02-28 | Partially-coated steel-concrete combined truss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219621940U true CN219621940U (en) | 2023-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320331131.2U Active CN219621940U (en) | 2023-02-28 | 2023-02-28 | Partially-coated steel-concrete combined truss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219621940U (en) |
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2023
- 2023-02-28 CN CN202320331131.2U patent/CN219621940U/en active Active
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