Large-span circular steel and concrete composite floor system

Abstract

The invention discloses a large-span circular steel and concrete composite floor system which comprises a plurality of steel beams arranged in a radial shape. A plurality of steel beams are connected to the steel beam intersection joint in a crossed mode to be indirectly connected so as to eliminate and avoid stress concentration; the stand columns are fixedly connected to the ends, away from the steel beam junction joints, of the steel beams. An upper ring beam and a lower ring beam are arranged, and the stand columns are installed between the upper ring beam and the lower ring beam; the concrete plate is mounted at the top of the steel beam through a plurality of studs; the invention relates to the technical field of building structures. According to the large-span circular steel and concrete composite floor system, the steel beam junction joints are arranged to be matched with the ring beams and the stand columns to install and connect the steel beams, installation is firm and stable, stress concentration can be avoided, meanwhile, junction structures are simple, prefabrication machining can be conducted, the bearing capacity is high, construction is convenient, and the shape is unique and attractive; the large-span floor structure is suitable for a circular building space.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, in particular to a large-span circular steel and concrete composite floor. Background Art

[0002] With the diversification of building structures and functions, and the pursuit of unique architectural forms, circular and elliptical shapes are increasingly being adopted. These floor structures have evolved from traditional rectangular floor structures, yielding structural arrangements more suitable for these geometric shapes. Typical circular floor structures include diverging radial beam-slab floors, spiderweb-like beam-slab floors, two-way ribbed floors, cross-beam floors, two-way multi-ribbed floors, and large circular slab beamless floors. Diverging radial beam-slab floors and spiderweb-like beam-slab floors combine the characteristics of circular structures, with radial beams converging from the outer ring at the center, creating a unique architectural effect. However, when the number of beams is large, the intersections become complex, leading to complex reinforcement structures for concrete structures. When the number of beams is small, the loads borne by individual beams are high, resulting in large beam cross-sections.

[0003] Circular floor slabs have a significant spatial effect and can also create unique styling effects when applied to circular architectural spaces. However, the heavy weight and complex steel reinforcement structure of traditional reinforced concrete structures have restricted the development of circular floor slab systems. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a large-span circular steel and concrete composite floor, which solves the problems of the existing circular floor structure.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A large-span circular steel and concrete composite floor, comprising:

[0006] Steel beams, several of which are arranged radially;

[0007] Steel beam intersection nodes, where several steel beams are indirectly connected by intersecting and connecting at the steel beam intersection nodes to eliminate stress concentration;

[0008] The column is fixedly connected to the end of the steel beam away from the intersection of the steel beam;

[0009] Ring beams are provided in two sets, upper and lower, with columns installed between the upper and lower ring beams;

[0010] A concrete slab, mounted on top of the steel beams via several studs;

[0011] A positioning structure for positioning the installation angles of several steel beams is provided inside the steel beam intersection node.

[0012] Preferably, the steel beam is an I-shaped steel beam, the concrete slab is circular, and the bolts are arranged on the upper flange of the steel beam and anchored in the concrete slab.

[0013] Preferably, the steel beam intersection node is composed of a node upper wing plate, a node lower wing plate, a node steel pipe and a steel beam web. The node upper wing plate and the node lower wing plate are respectively welded to the two ends of the node steel pipe, and the steel beam web is welded to the outside of the node steel pipe and between the node upper wing plate and the node lower wing plate.

[0014] Preferably, notches are cut on the upper and lower surfaces of one end of the steel beam, and the vertical plate portion of the steel beam at this end is inserted into the upper wing plate and the lower wing plate of the node. The positioning structure is a steel beam web. The steel beam is welded by fitting the steel beam web to position the steel beam welding angle. The vertical plate portion of the steel beam at this end is fixed to the steel beam web by bolts.

[0015] Preferably, the steel beam webs are arranged in pairs, and each pair of two steel beam webs are respectively arranged on both sides of the vertical plate of the steel beam, and the opposite surfaces of the node upper wing plate and the node lower wing plate are provided with positioning strips for positioning the distance between the two steel beam webs.

[0016] Preferably, the node upper wing plate and the node lower wing plate are both star-shaped structures and are provided with chamfers to avoid stress concentration.

[0017] Preferably, the positioning strip is star-shaped and serves as a reinforcing rib for the upper and lower wing plates of the node to enhance the strength of the upper and lower wing plates of the node. Positioning grooves corresponding to the positioning strips are provided on the upper and lower end faces of the node steel pipe.

[0018] Preferably, a connection reinforcement component is commonly provided on opposite sides of the node upper wing plate and the node lower wing plate, and the node upper wing plate and the node lower wing plate are tension-connected via the connection reinforcement component.

[0019] Preferably, the connection strengthening component includes:

[0020] A connecting seat, fixedly connected to the center of the top of the node lower wing plate;

[0021] The connecting column rotates and passes through the center of the connecting seat;

[0022] The limit seat is fixedly connected to the center of the bottom of the wing plate on the node, and one end of the connecting column is inserted into the limit seat and rotated to lock the limit seat.

[0023] Preferably, the connecting column includes a pipe column, one end of the pipe column is fixedly connected to a circular disc rotatably arranged inside the connecting seat, and the other end of the pipe column is fixedly connected to a locking disc with two opposite planes. The limit seat is hollow and has a through groove adapted to the locking disc at the bottom. The locking disc extends to the inside of the limit seat through the through groove and rotates to lock the limit seat. A rotating groove is provided at the bottom of the disc, and a circular hole for a tool to rotate the disc is provided at the bottom of the lower wing plate of the node.

[0024] The present invention provides a large-span circular steel and concrete composite floor. Compared with the prior art, it has the following advantages:

[0025] 1. This large-span circular steel and concrete composite floor is installed by setting steel beam intersection nodes in conjunction with ring beams and columns to connect steel beams. The installation is firm and stable, and stress concentration can be avoided. At the same time, the intersection structure is simple and can be prefabricated. It has strong bearing capacity, convenient construction, unique and beautiful shape, and is suitable for large-span floor structures in circular building spaces.

[0026] 2. This large-span circular steel and concrete composite floor has steel beam webs arranged in pairs and clamping the vertical plates of the steel beams. The three are fixed as a whole, which balances the force and ensures the installation strength. The paired steel beam webs are hollowed out to maintain sufficient strength while reducing the weight.

[0027] 3. In this large-span circular steel and concrete composite floor, the positioning strip 25 can be used as a structure for positioning the installation position and distance of the steel beam web 24, and can also be used as a reinforcing rib to improve the bending strength of the node upper wing plate 21 and the node lower wing plate 22, so that the steel beam intersection node 2 located in the center can withstand a large force without deformation; and by arranging a connection reinforcement component on the opposite surfaces of the node upper wing plate 21 and the node lower wing plate 22, the node upper wing plate 21 and the node lower wing plate 22 can be locked before welding, without the need to hold the node steel pipe 23 end and hold it steady for welding, which saves effort. At the same time, the connection reinforcement components can also pull each other to improve the force strength of the node upper wing plate 21 and the node lower wing plate 22, thereby ensuring the overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an assembly diagram of the overall structure of the present invention;

[0029] Figure 2 This is an assembly diagram of the steel beam, steel beam intersection node, column and ring beam of the first embodiment of the present invention;

[0030] Figure 3 This is an exploded view of the steel beam intersection node of the first embodiment of the present invention;

[0031] Figure 4 This is an assembly diagram of the steel beam, steel beam intersection node, column and ring beam of the second embodiment of the present invention;

[0032] Figure 5 This is an exploded view of the intersection of steel beams in the second embodiment of the present invention;

[0033] Figure 6 This is an exploded view of the steel beam intersection node of the third embodiment of the present invention;

[0034] Figure 7 is a top perspective schematic diagram of the connection reinforcement assembly of the present invention;

[0035] Figure 8 It is a bottom perspective schematic diagram of the connection reinforcement assembly of the present invention.

[0036] In the figure: 1-steel beam, 11-notch, 2-steel beam intersection node, 21-node upper wing plate, 22-node lower wing plate, 23-node steel pipe, 24-steel beam web, 25-positioning strip, 26-positioning groove, 27-connecting seat, 28-connecting column, 281-pipe column, 282-disc, 283-locking disk, 284-rotation groove, 29-limiting seat, 210-through groove, 3-column, 4-ring beam, 5-concrete slab, 6-bolt. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] The present invention provides three technical solutions:

[0039] Figure 1-Figure 3 and Figure 5 A first embodiment is shown: a long-span circular steel and concrete composite floor, comprising:

[0040] Steel beams 1, with several beams arranged radially;

[0041] Steel beam intersection node 2, several steel beams 1 are indirectly connected by intersecting and connecting at the steel beam intersection node 2 to eliminate stress concentration;

[0042] The column 3 is fixedly connected to the end of the steel beam 1 away from the steel beam intersection node 2;

[0043] The ring beam 4 is provided with two sets, upper and lower, and the column 3 is installed between the upper and lower sets of ring beams 4;

[0044] The concrete slab 5 is mounted on top of the steel beam 1 through a number of studs 6;

[0045] A positioning structure for positioning the installation angles of several steel beams 1 is provided inside the steel beam intersection node 2 .

[0046] The steel beam 1 is an I-shaped steel beam, and the concrete slab 5 is circular and is a reinforced concrete component. Double-layer bidirectional steel bars are configured inside according to design requirements. The studs 6 are arranged on the upper flange of the steel beam 1 and anchored in the concrete slab 5. There are two rows of studs 6 on the upper flange of the steel beam 1, and the two rows of studs 6 are staggered in a W shape to maintain sufficient strength of the upper flange of the steel beam 1.

[0047] The steel beam intersection node 2 is composed of a node upper wing plate 21, a node lower wing plate 22, a node steel pipe 23 and a steel beam web 24. The node upper wing plate 21 and the node lower wing plate 22 are both star-shaped structures and are provided with chamfers to avoid stress concentration. The node upper wing plate 21 and the node lower wing plate 22 are respectively welded to the two ends of the node steel pipe 23 using single-sided fillet welds. The steel beam web 24 is welded to the outside of the node steel pipe 23 and between the node upper wing plate 21 and the node lower wing plate 22 using double-sided fillet welds. The steel beam web 24 is separately welded to the surface of the node steel pipe 23 to avoid large welding residual stress and processing errors caused by direct welding of the webs together.

[0048] Notches 11 are cut on the upper and lower surfaces of one end of the steel beam 1, and the vertical plate portion of this end of the steel beam 1 is inserted into the upper wing plate 21 and the lower wing plate 22 of the node. The positioning structure is the steel beam web 24. The steel beam 1 is welded by fitting the steel beam web 24 to position the welding angle of the steel beam 1. The vertical plate portion of this end of the steel beam 1 is fixed to the steel beam web 24 by bolts.

[0049] By setting the steel beam intersection node 2 and cooperating with the ring beam 4 and the column 3 to install the connecting steel beam 1, the installation is firm and stable, and stress concentration can be avoided. At the same time, the intersection structure is simple and can be prefabricated. It has strong bearing capacity, convenient construction, unique and beautiful shape, and is suitable for large-span floor structures in circular building spaces.

[0050] Figure 4-Figure 5 A second embodiment is shown, which mainly differs from the first embodiment in that the steel beam webs 24 are arranged in pairs, and each pair of two steel beam webs 24 are respectively arranged on both sides of the vertical plate of the steel beam 1, and the opposite surfaces of the node upper wing plate 21 and the node lower wing plate 22 are provided with positioning strips 25 for positioning the distance between the two steel beam webs 24.

[0051] The steel beam webs 24 are arranged in pairs and clamp the vertical plates of the steel beam 1. The three are fixed as a whole, the force is balanced and the installation strength is guaranteed. The paired steel beam webs 24 are hollowed out to maintain sufficient strength while reducing weight.

[0052] Figure 5-Figure 8A third embodiment is shown, which mainly differs from the second embodiment in that the positioning strip 25 has a star-shaped structure, and the positioning strip 25 serves as a reinforcing rib of the node upper wing plate 21 and the node lower wing plate 22 to strengthen the strength of the node upper wing plate 21 and the node lower wing plate 22, and the upper and lower end faces of the node steel pipe 23 are provided with positioning grooves 26 corresponding to the positioning strip 25.

[0053] The node upper wing plate 21 and the node lower wing plate 22 are provided with a connection reinforcement component on opposite sides thereof, and the node upper wing plate 21 and the node lower wing plate 22 are connected in tension by the connection reinforcement component.

[0054] Connection-strengthening components include:

[0055] A connecting seat 27 is fixedly connected to the center of the top of the node lower wing plate 22;

[0056] The connecting column 28 rotates and passes through the center of the connecting seat 27. In order to reduce weight, the connecting column 28 adopts a hollow structure as a whole;

[0057] The limiting seat 29 is fixedly connected to the center of the bottom of the node upper wing plate 21. One end of the connecting column 28 is inserted into the limiting seat 29 and rotated to lock the limiting seat 29.

[0058] The connecting column 28 includes a tube column 281, one end of which is fixedly connected to a disc 282 rotatably arranged inside the connecting seat 27, and the other end of the tube column 281 is fixedly connected to a locking disc 283 with two opposite planes. The limit seat 29 is hollow and has a through groove 210 at the bottom that is adapted to the locking disc 283. The locking disc 283 extends to the inside of the limit seat 29 through the through groove 210 and rotates to lock the limit seat 29. A rotating groove 284 is provided at the bottom of the disc 282, and a circular hole is provided at the bottom of the node lower wing plate 22 for a tool to rotate the disc 282.

[0059] On the one hand, the positioning strip 25 can be used as a structure for positioning the installation position and distance of the steel beam web 24, and at the same time, it can also be used as a reinforcing rib to improve the bending strength of the node upper wing plate 21 and the node lower wing plate 22, so that the steel beam intersection node 2 located in the center can withstand a larger force without deformation; and by arranging a connection reinforcement component on the opposite surfaces of the node upper wing plate 21 and the node lower wing plate 22, the node upper wing plate 21 and the node lower wing plate 22 can be locked before welding, and there is no need to hold them tightly on the end of the node steel pipe 23 and hold them steady for welding, which saves effort in operation. At the same time, the connection reinforcement components can also pull each other to improve the force strength of the node upper wing plate 21 and the node lower wing plate 22, thereby ensuring the overall performance.

[0060] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A large-span circular steel and concrete composite floor, characterized by: include: Steel beams, several of which are arranged radially; Steel beam intersection nodes, where several steel beams are indirectly connected by intersecting and connecting at the steel beam intersection nodes to eliminate stress concentration; The column is fixedly connected to the end of the steel beam away from the intersection of the steel beam; Ring beams are provided in two sets, upper and lower, with columns installed between the upper and lower ring beams; A concrete slab, mounted on top of the steel beams via several studs; A positioning structure for positioning the installation angles of several steel beams is provided inside the steel beam intersection node.

2. A large-span circular steel and concrete composite floor according to claim 1, characterized in that: The steel beam is an I-shaped steel beam, the concrete slab is circular, and the bolts are arranged on the upper flange of the steel beam and anchored in the concrete slab.

3. The large-span circular steel and concrete composite floor according to claim 1, characterized in that: The steel beam intersection node consists of a node upper wing plate, a node lower wing plate, a node steel pipe and a steel beam web. The node upper wing plate and the node lower wing plate are respectively welded to the two ends of the node steel pipe, and the steel beam web is welded between the outer side of the node steel pipe and the node upper wing plate and the node lower wing plate.

4. The large-span circular steel and concrete composite floor according to claim 2, characterized in that: The upper and lower surfaces of one end of the steel beam are both cut with notches, and the vertical plate portion of the steel beam at this end is inserted into the upper wing plate and the lower wing plate of the node. The positioning structure is the web of the steel beam. The steel beam is welded by fitting the web of the steel beam to position the welding angle of the steel beam. The vertical plate portion of the steel beam at this end is fixed to the web of the steel beam by bolts.

5. The large-span circular steel and concrete composite floor according to claim 4, characterized in that: The steel beam webs are arranged in pairs, and each pair of two steel beam webs are respectively arranged on both sides of the vertical plate of the steel beam, and the opposite surfaces of the node upper wing plate and the node lower wing plate are provided with positioning strips for positioning the distance between the two steel beam webs.

6. The large-span circular steel and concrete composite floor according to claim 1, characterized in that: The node upper wing plate and the node lower wing plate are both star-shaped structures and are provided with chamfers to avoid stress concentration.

7. The large-span circular steel and concrete composite floor according to claim 5, characterized in that: The positioning strip is star-shaped and serves as a reinforcing rib for the upper and lower wing plates of the node to enhance their strength. The upper and lower end surfaces of the node steel pipe are provided with positioning grooves corresponding to the positioning strip.

8. The large-span circular steel and concrete composite floor according to claim 7, characterized in that: The opposite sides of the node upper wing plate and the node lower wing plate are commonly provided with a connection reinforcement component, and the node upper wing plate and the node lower wing plate are tension-connected through the connection reinforcement component.

9. The large-span circular steel and concrete composite floor according to claim 1, characterized in that: The connection strengthening component includes: A connecting seat, fixedly connected to the center of the bottom of the lower wing plate of the node; The connecting column rotates and passes through the center of the connecting seat; The limit seat is fixedly connected to the center of the top of the wing plate on the node, and one end of the connecting column is inserted into the limit seat and rotated to lock the limit seat.

10. The large-span circular steel and concrete composite floor according to claim 1, characterized in that: The connecting column includes a pipe column, one end of which is fixedly connected to a circular disc rotatably arranged inside the connecting seat, and the other end of the pipe column is fixedly connected to a locking disc with two opposite planes. The limit seat is hollow and has a through groove adapted to the locking disc at the bottom. The locking disc extends into the interior of the limit seat through the through groove and rotates to lock the limit seat. A rotating groove is provided at the bottom of the disc, and a circular hole for a tool to rotate the disc is provided at the bottom of the lower wing plate of the node.

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