Straight line curved surface connecting node for transition section of square and round steel pipe

Abstract

The utility model discloses a square and round steel tube transition section straight line curved surface connection node which comprises a round steel tube and a square steel tube, and a transition section is arranged between the round steel tube and the square steel tube. The transition section is a straight-line curved-surface connecting node with a round upper part and a hollow lower part, and the straight-line curved-surface connecting node is composed of four first 1 / 8 straight-line curved-surface connecting node parts and four second 1 / 8 straight-line curved-surface connecting node parts; the top ends of the first 1 / 8 straight-line curved-surface connecting node part and the second 1 / 8 straight-line curved-surface connecting node part are in an arc shape which is 1 / 8 of the circumference of the bottom end of the round steel pipe, and the bottom end is in a straight shape which is 1 / 2 of the side length of the top end of the square steel pipe; the four first 1 / 8 ruled surface connecting node parts and the four second 1 / 8 ruled surface connecting node parts are arranged in a staggered mode in the circumferential direction of the ruled surface connecting node, and the adjacent first 1 / 8 ruled surface connecting node part and the second 1 / 8 ruled surface connecting node part are arranged in a mirror symmetry mode with the connecting position as the axis. The utility model not only is direct and reliable in force transmission, but also can meet the smooth requirement of a building.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipes, in particular to a straight-grained curved surface connection node for a transition section of a square-circular steel pipe. Background Art

[0002] Steel tube structure or steel tube concrete structure is widely used in super high-rise peripheral frame columns. Compared with concrete structure, steel tube structure or steel tube concrete structure can reduce the workload of on-site formwork, especially the latter, which significantly improves the cross-sectional bearing capacity through the hooping effect of steel tube on concrete. Due to the requirements of the exterior effect of the building, sometimes round steel tubes are used below (for example, the steel tube column happens to be in the bottom lobby, which is a through-layer column), while the upper building function is a hotel or office, and it is hoped to be changed to square steel tubes; or square steel tubes at the bottom and round steel tubes at the top.

[0003] The cross-sections of round steel pipes and square steel pipe columns are different. As the outer frame columns of super high-rise buildings, they bear large loads. How to ensure the smooth transfer of loads is a key issue that must be considered in the design. Usually, referring to the practice of variable-section steel pipe columns, stiffening plates are set in the transition section, and the upper and lower steel columns transmit force through the stiffening plates. However, this connection method has two problems: 1) The force transmission is not direct, but indirectly through the stiffening plates; 2) The appearance cannot meet the smooth requirements of the building. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a square-round steel pipe transition section straight-grain curved surface connection node, which is arranged between the square steel pipe and the round steel pipe, and not only transmits force directly and reliably, but also has a smooth appearance, which can meet the smoothness requirements of the building.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0006] A square-round steel pipe transition section ruled surface connection node comprises a round steel pipe and a square steel pipe, wherein a transition section for connecting the round steel pipe and the square steel pipe and realizing a smooth transition between the two is arranged between the round steel pipe and the square steel pipe; the transition section is a ruled surface connection node with an upper circle and a lower part and a hollow interior, and the ruled surface connection node is composed of four first 1 / 8 ruled surface connection node parts and four second 1 / 8 ruled surface connection node parts, the top ends of the first 1 / 8 ruled surface connection node parts and the second 1 / 8 ruled surface connection node parts are arc-shaped with 1 / 8 of the circumference of the bottom end of the round steel pipe, and the bottom ends are straight-line-shaped with 1 / 2 of the side length of the top end of the square steel pipe; the four first 1 / 8 ruled surface connection node parts and the four second 1 / 8 ruled surface connection node parts are staggered along the circumference of the ruled surface connection node, and the adjacent first 1 / 8 ruled surface connection node parts and the second 1 / 8 ruled surface connection node parts are arranged in a mirror-symmetrical manner with the connection point as the axis.

[0007] Preferably, the first 1 / 8 ruled curved surface connection node portion and the second 1 / 8 ruled curved surface connection node portion are connected by welding.

[0008] Preferably, a cross-shaped stiffening plate is provided inside the transition section, the stiffening plate passes through the transition section and both ends of the stiffening plate extend to the round steel pipe and the square steel pipe respectively.

[0009] Preferably, the transition section is connected to both the round steel pipe and the square steel pipe by welding.

[0010] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0011] The utility model is easy to construct and install, and a transition relationship between the square steel pipe and the round steel pipe is established by setting a transition section with a straight curved surface connection node, which can not only achieve a gradual transition and a smooth appearance, thereby meeting the smoothness requirements of the building, but also directly and reliably transmit force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional diagram of the utility model after being connected with a round steel pipe and a square steel pipe;

[0013] Figure 2 It is a horizontal projection schematic diagram of the utility model.

[0014] Among them: 1. round steel pipe, 2. transition section, 21. first 1 / 8 ruled surface connection node part, 22. second 1 / 8 ruled surface connection node part, 3. square steel pipe. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] A square and round steel pipe transition section straight curved surface connection node, combined with Figure 1 As shown, it includes a round steel pipe 1 and a square steel pipe 3, and a transition section 2 is provided between the round steel pipe 1 and the square steel pipe 3. The transition section 2 is used to connect the round steel pipe 1 and the square steel pipe 3 and realize a smooth transition between the two, thereby ensuring a smooth appearance and meeting the smoothness requirements of the building.

[0017] Transition section 2 is a ruled surface connecting nodes with a circle on the top and a hollow bottom inside, such as Figure 2As shown, the ruled surface connection node is composed of four first 1 / 8 ruled surface connection node parts 21 and four second 1 / 8 ruled surface connection node parts 22. The top ends of the first 1 / 8 ruled surface connection node parts 21 and the second 1 / 8 ruled surface connection node parts 22 are arc-shaped, specifically 1 / 8 of the circumference of the bottom end of the round steel tube 1; the bottom ends of the first 1 / 8 ruled surface connection node parts 21 and the second 1 / 8 ruled surface connection node parts 22 are straight-line-shaped, specifically 1 / 2 of the side length of the top end of the square steel tube 3. The four first 1 / 8 ruled surface connection node parts 21 and the four second 1 / 8 ruled surface connection node parts 22 are staggered along the circumference of the ruled surface connection node, and the adjacent first 1 / 8 ruled surface connection node parts 21 and the second 1 / 8 ruled surface connection node parts 22 are arranged in a mirror-symmetrical manner with the connection as the axis.

[0018] The first 1 / 8 straight curved surface connection node portion 21 and the second 1 / 8 straight curved surface connection node portion 22 are connected by welding to produce a transition section 2. According to the stress conditions, a cross-shaped stiffening plate is provided inside the transition section 2, and the stiffening plate passes through the transition section 2 and extends to the round steel pipe 1 and the square steel pipe 3 at both ends. The transition section 2 is connected to the round steel pipe 1 and the square steel pipe 3 by welding. When in use, after the transition section 2 is transported to the construction site, the two ends are respectively welded to the square steel pipe 3 and the round steel pipe 1, which is convenient for construction and installation.

[0019] The utility model is convenient to construct and install when in use, and a transition relationship between the square steel pipe 3 and the round steel pipe 1 is established by setting a transition section 2 with a straight curved surface connection node, which can not only achieve a gradual transition and a smooth appearance, thereby meeting the smoothness requirements of the building, but also directly and reliably transmit force.

Claims

1. A square-round steel pipe transition section ruled curved surface connection node, comprising a round steel pipe (1) and a square steel pipe (3), characterized in that: A transition section (2) is provided between the round steel tube (1) and the square steel tube (3) for connecting the round steel tube (1) and the square steel tube (3) and achieving a smooth transition between the two; the transition section (2) is a ruled surface connection node with a round upper part and a hollow lower part inside, the ruled surface connection node is composed of four first 1 / 8 ruled surface connection node parts (21) and four second 1 / 8 ruled surface connection node parts (22), the first 1 / 8 ruled surface connection node parts (21) and the second 1 / 8 ruled surface connection node parts (22) are connected to each other by a plurality of first 1 / 8 ruled surface connection node parts (21). The top of the node part (22) is an arc shape with 1 / 8 of the circumference of the bottom of the round steel tube (1), and the bottom is a straight line shape with 1 / 2 of the side length of the top of the square steel tube (3); the four first 1 / 8 ruled surface connection node parts (21) and the four second 1 / 8 ruled surface connection node parts (22) are arranged alternately along the circumference of the ruled surface connection node, and the adjacent first 1 / 8 ruled surface connection node parts (21) and the second 1 / 8 ruled surface connection node parts (22) are arranged in a mirror-symmetrical manner with the connection point as the axis.

2. The square-round steel pipe transition section ruled surface connection node according to claim 1, characterized in that: The first 1 / 8 ruled surface connection node portion (21) and the second 1 / 8 ruled surface connection node portion (22) are connected by welding.

3. The square-round steel pipe transition section ruled surface connection node according to claim 2, characterized in that: A cross-shaped stiffening plate is arranged inside the transition section (2), the stiffening plate passes through the transition section (2) and the two ends of the stiffening plate extend to the round steel pipe (1) and the square steel pipe (3) respectively.

4. The square-round steel pipe transition section ruled surface connection node according to claim 1, characterized in that: The transition section (2) is connected to the round steel pipe (1) and the square steel pipe (3) by welding.

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