Super high-rise space net format tower crown steel structure and construction method thereof

Abstract

The application discloses a super-high space net format tower crown steel structure and a construction method thereof, and relates to the technical field of steel structures.The tower crown steel structure comprises a main body structure, a tower crown unit installed on the top of the main body structure, and an annular hole arranged on the top of the tower crown unit.The tower crown unit is a space net format steel structure, which is in the shape of a curved surface platform cap and is provided with an annular hole on the top.The first arc-shaped rod and the second arc-shaped rod are arranged, the middle parts of the two rods are crossed, the top parts and the bottom parts of the two rods are staggered and converged, and thus the frame of the arc-shaped rod space net format tower crown is formed.The reinforcing rods are arranged at the first node, the second node and the annular hole, and the connection positions of the reinforcing rods are reinforced, so that the integrity and the stress consistency of the structure are ensured.The space net format frame and the annular hole constraint are classified and disposed through the arrangement of the mark ring beam and the top ring beam, and the on-site construction is more convenient.In addition, the side surface and the top surface of the tower crown are sequentially arranged in the shape of a curved surface, the appearance is beautified, and the uniform stress of the whole structure is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of super high-rise tower crown construction technology, and specifically relates to a super high-rise spatial grid tower crown steel structure and its construction method. Background Technology

[0002] In the construction of super high-rise steel structures, the tower crown at the top is indispensable. The style of the tower crown is designed according to its shape and functional requirements. Most existing super high-rise tower crowns are constructed using steel structures, with vertical and circumferential members forming a framework in the shape of a tower crown. However, it is relatively rare to design the tower crown as a spatial grid structure, and even rarer to use curved members to connect the spatial grid structure with openings at the top and bottom. Therefore, it is necessary to conduct targeted design for the distribution of curved members, the connection of nodes, and the setting of ring beams in the spatial grid tower crown steel structure. Summary of the Invention

[0003] This invention provides a super high-rise space grid tower crown steel structure and its construction method, which solves technical problems such as the distribution design of arc-shaped members, the connection of nodes, and the setting of ring beams in space grid tower crown steel structures.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A super high-rise space grid-type tower crown steel structure includes a main structure and a tower crown unit installed on the top of the main structure, with an annular opening at the top of the tower crown unit; The tower crown unit is a spatial grid-type steel structure, which is a curved platform-shaped structure with an annular opening at the top. The lower part of the tower crown unit is open, with a rectangular opening surface. It also includes four vertical surfaces and a top surface. Among the four vertical surfaces, three are vertical or nearly vertical, and one is a vertical arc-shaped curved surface. The vertical arc-shaped curved surface and the top surface are connected by a smooth arc and gradually expand from top to bottom. The four vertical surfaces and the top surface are all formed by a set of first arc-shaped rods and a set of second arc-shaped rods connected in an alternating manner. The first set of first arc-shaped rods are arc-shaped rods and are arranged in parallel and spaced apart. The first set of first arc-shaped rods and the second set of second arc-shaped rods are arranged in an X-shape and intersect in a triangular shape at the top and bottom. The intersection of the triangular tops of the first and second arc-shaped rods is connected by a top ring beam, the inside of which is a ring-shaped opening; The first and second arc-shaped rods are connected at their intersection point by a standard ring beam, and the bottom triangular intersection point is also connected by a standard ring beam; and the bottom intersection point is connected to the support beam of the main structure by a bottom connector.

[0005] Furthermore, at least one reinforcing rod is provided in the middle of the top ring beam, and the reinforcing rod is located in the middle of the annular opening; the reinforcing rod is located at the intersection of the top of the first arc-shaped rod and the second arc-shaped rod.

[0006] Furthermore, the first arc-shaped rod and the second arc-shaped rod are connected at their top and bottom junctions via a node connecting plate; the node connecting plate is a vertical plate, and the height of the vertical plate is greater than the height of the mating surface required for the connection.

[0007] Furthermore, both the first and second arc-shaped rods are disconnected at the X intersection point to connect to the standard ring beam. After disconnection, they are divided into an upper inverted V-shape and a lower V-shape. The upper V and the lower inverted V are connected by a node connecting plate.

[0008] Furthermore, the top ring beam and the standard ring beam are composed of box beams, which are connected by welding at the joints; the box beams at the joints are also equipped with beam connecting plates, and there are at least three beam connecting plates, which are respectively set at the joint connecting plates and at the connection lines between the upper and lower outer ends of the arc-shaped bars on both sides.

[0009] Furthermore, the bottom connector is a cuboid with an opening at the bottom, and has a bottom connecting rib plate inside; the connecting beam rib plate is provided in at least two layers and is evenly spaced; the bottom connecting rib plate and the bottom connector are welded together.

[0010] Furthermore, the support beam is a box beam, and the support beam is equipped with support beam ribs inside; the support beam ribs are sequentially connected to the bottom connecting ribs and the two sides of the bottom connector.

[0011] Furthermore, a construction method for a super high-rise space grid tower crown steel structure includes the following specific steps: Step 1: Based on the detailed CAD drawings and BIM software modeling drawings, break down the tower crown unit into individual components and label them; Step 2: Mark the connection point of the standard ring beam with the X-shaped intersection of the first and second arc-shaped rods as the second node; mark the connection point of the standard ring beam with the V-shaped intersection of the first and second arc-shaped rods as the first node; number the first and second nodes sequentially according to their positions. Step 3: Install the tower crown from bottom to top. First, complete the main structure in advance and verify the position and strength of the support beams. Then, hoist the first node and its corresponding first and second arc-shaped rods. After the construction is completed, verify the position and install temporary supports. Step 4: Then, construct the second node of each layer and its corresponding first and second arc-shaped rods in sequence to form a spatial grid frame until the top is enclosed to form a ring-shaped opening; Step 5: At the annular opening, the top ring beam is used for the finishing construction, and then the reinforcing rods are installed, thus completing the construction of the super high-rise space grid tower crown steel structure.

[0012] Furthermore, the first and second arc-shaped rods are connected by connecting plates at nodes, and beam connecting plates are provided on the extension lines of the corresponding connecting plates at the standard ring beam and the top ring beam; beam connecting plates are also provided on both sides of the beam connecting plates at the outer sides of the first and second arc-shaped rods respectively.

[0013] Furthermore, the first node is connected to the support beam via a bottom connector, which is welded from steel plates. The bottom connector is an inverted U-shaped part, and a bottom connecting rib is provided inside the bottom connector.

[0014] The beneficial effects of this invention are reflected in: This invention utilizes a first and a second arc-shaped rod, with their midpoints intersecting and their tops and bottoms merging to form the framework of a spatial grid-like tower crown. Reinforcement is provided at the first node, the second node, and the connection points of the reinforcing rods at the annular opening, ensuring the structural integrity and consistency of stress. The use of standard and top ring beams categorizes and addresses the spatial grid framework formation and the constraints of the annular opening, facilitating on-site construction. Furthermore, the smooth curvature of one side and the top of the tower crown not only enhances its aesthetic appeal but also promotes uniform stress distribution.

[0015] This invention effectively solves the technical problems of the distribution design of arc-shaped members, the connection of nodes, and the setting of ring beams in curved spatial grid tower crowns, and is extremely easy and convenient to construct and to bear overall stress. Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of this invention may be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of the super high-rise space grid tower crown and main structure; Figure 2 This is a three-dimensional schematic diagram of a super high-rise space grid tower crown; Figure 3 This is a schematic diagram of the tower crown unit; Figure 4 This is a side view of the tower crown unit. Figure 1 ; Figure 5 This is a front view of the tower crown unit. Figure 2 ; Figure 6 This is a schematic diagram of the first node and its connection structure; Figure 7 This is a side view of the first node and its connecting structure; Figure 8 This is a schematic diagram of the second node and its connection structure; Figure 9This is a schematic diagram of the circular opening and its connecting structure.

[0017] Attached reference numerals: 1-Tower crown unit, 11-Standard ring beam, 12-Top ring beam, 13-Strengthening rod, 14-First arc-shaped rod, 15-Second arc-shaped rod, 16-First node, 17-Second node, 18-Node connecting plate, 19-Beam connecting plate, 2-Main structure, 3-Annular opening, 4-Support beam, 5-Bottom connector, 6-Bottom connecting rib, 7-Support beam rib. Detailed Implementation

[0018] Taking a high-speed rail area project as an example, its T1 tower has six underground floors and 50 floors above ground, with a building height of 248m, a total tower crown height of 25.35m, and a total weight of 435.7t. Figures 1 to 9 As shown, the super high-rise space grid-type tower crown steel structure includes a main structure 2 and a tower crown unit 1 installed on top of the main structure 2, with an annular opening 3 at the top of the tower crown unit 1. The tower crown unit 1 is a space grid-type steel structure, which is curved and cap-shaped with an annular opening 3 at the top. The lower part of the tower crown unit 1 is open, with the opening surface being a rectangular surface. It also includes four vertical surfaces and a top surface. Among the four vertical surfaces, three are vertical or nearly vertical, and one is a vertical arc-shaped curved surface. The vertical arc-shaped curved surface and the top surface are connected by a smooth arc and gradually expand from top to bottom. The four vertical surfaces and the top surface are all formed by a set of first arc-shaped rods 14 and a set of second arc-shaped rods 15 connected alternately. The first set of first arc-shaped rods 14 are arc-shaped rods and are arranged in parallel and spaced apart. The second set of second arc-shaped rods 15 are arc-shaped rods and are arranged in parallel and spaced apart.

[0019] In this embodiment, a set of first arc-shaped rods 14 and a set of second arc-shaped rods 15 are arranged in an X-shape, and intersect at the top and bottom in a staggered triangular shape. The top triangular intersection point of the first arc-shaped rods 14 and the second arc-shaped rods 15 is connected by a top ring beam 12, the interior of which is an annular opening 3. The X-shaped intersection point of the first arc-shaped rods 14 and the second arc-shaped rods 15 is connected by a standard ring beam 11, and the bottom triangular intersection point is also connected by a standard ring beam 11. The bottom intersection point is connected to the support beam 4 of the main structure 2 by a bottom connector 5. Both the first arc-shaped rods 14 and the second arc-shaped rods 15 are constructed using φ300×16 round tubes made of Q355C to form a spatial grid structure.

[0020] In this embodiment, at least one reinforcing rod 13 is provided in the middle of the top ring beam 12, and the reinforcing rod 13 is located in the middle of the annular opening 3; the reinforcing rod 13 is located at the intersection of the top of the first arc-shaped rod 14 and the second arc-shaped rod 15.

[0021] In this embodiment, the first arc-shaped rod 14 and the second arc-shaped rod 15 are connected at their top and bottom junctions via a node connecting plate 18. The node connecting plate 18 is a vertical plate, and its height is greater than the required height of the mating surface. Both the first arc-shaped rod 14 and the second arc-shaped rod 15 are disconnected at the X-intersection point to form a disconnected connection to the standard ring beam 11, resulting in an upper inverted V-shape and a lower V-shape. The upper V and the lower inverted V are connected via the node connecting plate 18.

[0022] In this embodiment, the top ring beam 12 and the standard ring beam 11 are box-type beams connected by welding at the joints. At least three beam connecting plates 19 are provided at the joints, corresponding to the connections of the joint connecting plates 18 and the lines connecting the upper and lower outer ends of the two curved rods. The top ring beam 12 and the standard ring beam 11 are made of 400×300×30×30 box girder material Q355C. The reinforcing rod 13 is made of the same material as the top ring beam.

[0023] In this embodiment, the bottom connector 5 is a cuboid with an open bottom and has a bottom connecting rib 6 inside; at least two connecting beam ribs are provided and are evenly spaced; the bottom connecting ribs 6 and the bottom connector 5 are welded together. The support beam 4 is a box beam, and the support beam 4 has a supporting beam rib 7 inside; the supporting beam rib 7 is arranged sequentially on both sides corresponding to the bottom connecting rib 6 and the bottom connector 5.

[0024] Combination Figures 1 to 9 As shown, the construction method of the super high-rise space grid tower crown steel structure is further explained. The specific steps are as follows: Step 1: Based on the CAD detailed drawings and BIM software modeling drawings, break down Tower Crown Unit 1 into individual components and label them.

[0025] Step 2: Mark the connection point of the standard ring beam 11 with the first arc-shaped rod 14 and the second arc-shaped rod 15 at the X-shaped intersection as the second node 16, and mark the connection point of the standard ring beam 11 with the first arc-shaped rod 14 and the second arc-shaped rod 15 at the bottom V-shaped intersection as the first node 17; number the first node 17 and the second node 16 sequentially according to their positions.

[0026] Step 3: Install the tower crown from bottom to top. First, complete the main structure 2 in advance and check the position and strength of the support beam 4. Then, hoist the first node 17 and its corresponding first arc rod 14 and second arc rod 15. After the construction is completed, check the position and install temporary supports.

[0027] During construction, the first arc-shaped rod 14 and the second arc-shaped rod 15 are connected by a joint plate 18. A beam connecting plate 19 is provided on the extension line of the joint plate 18 at the standard ring beam 11 and the top ring beam 12. A beam connecting plate 19 is also provided on both sides of the beam connecting plate 19 at the outer sides of the first arc-shaped rod 14 and the second arc-shaped rod 15, respectively.

[0028] The first node 17 is connected to the support beam 4 by a bottom connector 5, which is welded from steel plates. The bottom connector 5 is an inverted U-shaped part, and a bottom connecting rib plate 6 is provided inside the bottom connector 5.

[0029] Step 4: Then, construct the second node 16 of each layer and its corresponding first arc rod 14 and second arc rod 15 in sequence to form a spatial grid frame until the top is enclosed to form a ring opening 3.

[0030] Step 5: At the annular opening 3, the top ring beam 12 is used for the finishing construction, and then the reinforcing rod 13 is installed, thus completing the construction of the super high-rise space grid tower crown steel structure.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A super high-rise space grid tower crown steel structure, characterized in that, Includes the main structure (2), the crown unit (1) installed on the top of the main structure (2), and the annular opening (3) set on the top of the crown unit (1). The tower crown unit (1) is a spatial grid steel structure, which is a curved platform hat and has an annular opening (3) at the top; the lower part of the tower crown unit (1) is open, the opening surface is a rectangular surface, and it also includes four vertical surfaces and a top surface. Among the four vertical surfaces, three are vertical or nearly vertical surfaces, and one is a vertical arc surface. The vertical arc surface and the top surface are connected in a smooth arc and gradually expand from top to bottom. The four vertical surfaces and the top surface are all formed by a set of first arc-shaped rods (14) and a set of second arc-shaped rods (15) connected in an alternating manner. The set of first arc-shaped rods (14) are arc-shaped rods and are arranged in parallel intervals. The set of first arc-shaped rods (14) and the set of second arc-shaped rods (15) are arranged in an X-shape and intersect at the top and bottom in a triangular shape. The triangular intersection of the top of the first arc rod (14) and the second arc rod (15) is connected by the top ring beam (12), and the inside of the top ring beam (12) is a ring-shaped opening (3). The first arc rod (14) and the second arc rod (15) are connected at the intersection point by a standard ring beam (11), and the bottom triangular intersection point is also connected by a standard ring beam (11); and the bottom intersection point is connected to the support beam (4) of the main structure (2) by a bottom connector (5).

2. The ultra-high-rise space grid tower crown steel structure as described in claim 1, characterized in that, At least one reinforcing rod (13) is provided in the middle of the top ring beam (12), and the reinforcing rod (13) is located in the middle of the annular opening (3); the reinforcing rod (13) is located at the intersection of the top of the first arc-shaped rod (14) and the second arc-shaped rod (15).

3. The ultra-high-rise spatial grid tower crown steel structure as described in claim 1, characterized in that, The first arc-shaped rod (14) and the second arc-shaped rod (15) are connected at the junction of the top and bottom ends by a node connecting plate (18); the node connecting plate (18) is a vertical plate, and the height of the vertical plate is greater than the height of the docking surface required for docking.

4. The ultra-high-rise space grid tower crown steel structure as described in claim 1, characterized in that, The first arc rod (14) and the second arc rod (15) are both disconnected at the X intersection point to set the disconnection point to connect the standard ring beam (11). After disconnection, they are set into an upper inverted V shape and a lower V shape. The upper V and the lower inverted V are connected by a node connecting plate (18).

5. A super high-rise space grid tower crown steel structure as described in claim 1, characterized in that, The top ring beam (12) and the standard ring beam (11) are made of box beams and are connected by welding at the nodes; the box beams at the nodes are also provided with beam connecting plates (19), and there are at least three beam connecting plates (19), which are respectively connected to the node connecting plate (18) and the upper and lower outer ends of the arc rods on both sides.

6. The ultra-high-rise space grid tower crown steel structure as described in claim 1, characterized in that, The bottom connector (5) is a rectangular body with an opening at the bottom, and a bottom connecting rib (6) is provided inside; at least two connecting beam ribs are provided and are evenly spaced; the bottom connecting rib (6) and the bottom connector (5) are welded together.

7. A super high-rise space grid tower crown steel structure as described in claim 1, characterized in that, The support beam (4) is a box beam, and the support beam (4) is provided with a support beam rib (7); the support beam rib (7) is connected to the bottom connecting rib (6) and the bottom connecting piece (5) on both sides.

8. The construction method of a super high-rise spatial grid tower crown steel structure as described in claim 1, characterized in that, The specific steps are as follows: Step 1: Based on the CAD detailed drawings and BIM software modeling drawings, the tower crown unit (1) is broken down into individual components and labeled; Step 2: Mark the connection point of the X-shaped intersection of the standard ring beam (11) with the first arc rod (14) and the second arc rod (15) as the second node (16), and mark the connection point of the V-shaped intersection of the standard ring beam (11) with the first arc rod (14) and the second arc rod (15) as the first node (17); number the first node (17) and the second node (16) according to their positions. Step 3: Install the tower crown from bottom to top. First, complete the main structure (2) in advance and check the position and strength of the support beam (4). Then, hoist the first node (17) and its corresponding first arc rod (14) and second arc rod (15). After the construction is completed, check the position and install the temporary support. Step 4: Then, according to the second node (16) of each layer and its corresponding first arc rod (14) and second arc rod (15), construction is carried out in sequence to form a spatial grid frame until the top is enclosed to form a ring opening (3). Step 5: At the annular opening (3), the top ring beam (12) is used for the closing construction, and then the reinforcing rod (13) is installed, thereby completing the construction of the super high-rise space grid tower crown steel structure.

9. A construction method for a super high-rise spatial grid tower crown steel structure as described in claim 1, characterized in that, When the first arc-shaped rod (14) and the second arc-shaped rod (15) are connected, they are connected by a joint plate (18). A beam connecting plate (19) is provided on the extension line of the joint plate (18) at the standard ring beam (11) and the top ring beam (12). A beam connecting plate (19) is also provided on both sides of the beam connecting plate (19) at the outer side of the first arc-shaped rod (14) and the second arc-shaped rod (15).

10. A construction method for a super high-rise spatial grid tower crown steel structure as described in claim 9, characterized in that, The first node (17) is connected to the support beam (4) by a bottom connector (5), which is welded from steel plates. The bottom connector (5) is an inverted U-shaped part, and a bottom connecting rib plate (6) is provided inside the bottom connector (5).

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