Cross concrete filled steel tubular column reinforced node for cooling tower convenient to construct

Abstract

A reinforced joint of a crossed concrete filled steel tubular column for a cooling tower convenient to construct comprises four steel supporting columns, a radial reinforcing plate and an annular reinforcing plate, the four steel supporting columns are welded to form the crossed steel tubular joint of an X-shaped structure, and the radial reinforcing plate and the annular reinforcing plate are welded in the crossed steel tubular joint. The four steel supporting columns and the positions of the reinforced joints are all filled with concrete. Compared with the prior art, the reinforcing joint has the following advantages: (1) the reinforcing joint is not provided with a stiffening rib inside the steel pipe, so that the condition that a plurality of welding seams are mutually crossed is avoided, the construction process is simplified, and the manufacturing is simple; meanwhile, the reinforcing part is not exposed outside the component, and the appearance is attractive. And (2) the reinforced node can be designed based on the principle of'strong node and weak component ', the annular reinforcing plate and the radial reinforcing plate respectively improve the in-plane and out-plane rigidity of the crossed steel tube concrete, and also improve the steel content of the section, so that the bearing capacity of the node is improved, and the node is safer and more reliable.

Description

Technical Field

[0001] The utility model discloses a steel tube concrete column reinforced node, in particular a cross steel tube concrete column reinforced node for a cooling tower which is easy to construct, belongs to the technical field of industrial building cooling towers, and is particularly suitable for a super large cooling tower structure using cross steel tube concrete columns. Background Art

[0002] Cross-steel tube concrete reinforced nodes refer to the reinforcement design of the connection nodes in the cross-steel tube concrete components, which are usually used to improve the seismic performance or bearing capacity of cross-steel tube concrete components.

[0003] Existing technologies for enhanced nodes that can be documented include the following:

[0004] (1) Please see the attached Figure 1 The patent document with publication number CN105484368 B proposes an intersecting node with internal reinforcement of cross steel tube concrete. The node reinforcement forms include: two semi-annular connecting plates and an elliptical connecting plate are welded in the middle part of the elliptical connecting plate to form a cross plate; four round steel tubes are welded to the elliptical plate and the annular connecting plate at the four corners of the cross plate; the annular inner stiffening plate is welded to the inner wall of the round steel tube and the elliptical plate; the vertical stiffening plate is welded to the annular stiffening plate, the annular connecting plate and the inner wall of the round steel tube; the outward extending bracket is welded to the outer wall of the steel tube.

[0005] (2) Please see the attached Figure 2 In the patent application documents with publication numbers CN110108151A and CN210004859U, a reinforced steel tube concrete X-pillar is proposed, and the node reinforcement measures include: a tie plate, an annular reinforcement plate and a stiffening plate. The tie plate is arranged at the mutual connection of the four steel tube limbs, and the tie plate and the four steel tube limbs are connected by welding; the annular reinforcement plate is arranged at the periphery of the connection of the four steel tube limbs; the stiffening plate is arranged between adjacent annular reinforcement plates, and the stiffening plate is arranged along the radial and axial direction of the steel tube limbs, and is welded to the steel tube limbs and the annular reinforcement plate.

[0006] (3) Please see the attached Figure 3 The patent with publication number CN208363297U proposes a connection node structure between circular concrete-filled tube columns and square concrete-filled tube columns. Circumferential stiffening ribs are set within 200mm of the intersection of circular concrete-filled tube columns, and circumferential stiffening ribs or transverse stiffening ribs are set within 200mm of the intersection of giant square concrete-filled tube columns and circular steel tube diagonal braces. Longitudinal stiffening ribs are set in circular concrete-filled tube columns, square concrete-filled tube columns and circular steel tube diagonal braces, and their length range is not less than the distance between the circumferential stiffening ribs.

[0007] The above-mentioned existing similar technologies generally have the following problems: (1) The existing node reinforcement forms require the arrangement of transverse, longitudinal or circumferential stiffening ribs in the steel pipe, resulting in a large number of welds that are staggered horizontally and vertically, a complex structure and inconvenience in construction, and a complex distribution of welding stress in the steel components in the node area, which is prone to structural weaknesses caused by welding stress. (2) Most of the existing reinforced node forms expose reinforcement components such as reinforcement rings to the outside of the steel pipe. The complex reinforcement components reduce the overall aesthetics of the component, thereby affecting the overall aesthetics of the building. Summary of the invention

[0008] In view of the shortcomings of the above-mentioned prior art of complex welding stress distribution of steel components in the area of ​​crossed steel tube concrete reinforced nodes and poor overall aesthetics, the utility model provides a crossed steel tube concrete column reinforced node for cooling towers which is easy to construct. It adopts built-in annular reinforcement plates and radial reinforcement plates to respectively improve the in-plane and out-of-plane stiffness of the crossed steel tube concrete, while also increasing the cross-section steel content, thereby improving the node bearing capacity.

[0009] The utility model adopts the following technical solution to solve the technical problem: a cross steel tube concrete column reinforced node for a cooling tower which is easy to construct, the reinforced node comprising four steel pillars, a radial reinforcement plate and an annular reinforcement plate, the four steel pillars are welded to form an "X"-shaped cross steel tube node, radial reinforcement plates and annular reinforcement plates are welded inside the cross steel tube node, and the inside of the four steel pillars and the reinforced node position are filled with concrete.

[0010] The technical solution adopted by the utility model to solve its technical problems further includes:

[0011] The steel support column is made of round steel pipe.

[0012] The steel pillars are respectively a first round steel pipe, a second round steel pipe, a third round steel pipe and a fourth round steel pipe, and the intersection angle between the two upper round steel pipes is α.

[0013] The connection parts of the first round steel tube, the second round steel tube, the third round steel tube and the fourth round steel tube are cut in the vertical direction and the horizontal direction respectively, and the focus of the vertical and horizontal cutting is the center point passing through the first round steel tube, the second round steel tube, the third round steel tube and the fourth round steel tube.

[0014] The annular reinforcement plate is in the same annular direction as the cooling tower.

[0015] The radial reinforcing plate is in the same radial direction as the cooling tower.

[0016] The radial reinforcement plate and the annular reinforcement plate are arranged perpendicularly.

[0017] The shape of the annular reinforcement plate is formed by mirroring an isosceles trapezoid along the short side, and both side edges of the annular reinforcement plate are directly welded to the inner side walls of the corresponding steel pillars.

[0018] The radial reinforcing plate is oval or circular, and both side edges of the radial reinforcing plate are directly welded to the inner side walls of the corresponding steel pillars.

[0019] The thickness of the annular reinforcement plate is t1, and the thickness of the radial reinforcement plate is t2.

[0020] The beneficial effects of the utility model are as follows: the utility model proposes a reinforced node and a design method thereof that is easy to construct, simple and beautiful, targeting the weak parts of the cross-nodes of the cross-steel tube concrete columns of the super-large cooling tower structure. The node has the following advantages: (1) The reinforced node does not have stiffening ribs inside the steel tube, thus avoiding the situation where multiple welds cross each other, simplifying the construction process and making it simple to manufacture. At the same time, the reinforced components are not exposed outside the components, and the shape is beautiful. (2) Based on the principle of "strong node and weak component", the reinforced node of the utility model can be designed. The annular reinforcement plate and the radial reinforcement plate respectively increase the stiffness of the cross-steel tube concrete in-plane and out-of-plane, and also increase the steel content of the section, thereby increasing the bearing capacity of the node and making it safer and more reliable.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the existing reinforced node form in the patent document with publication number CN105484368 B (the figure marks are deleted in the figure, and the content of the figure is retained).

[0023] Figure 2 This is a schematic diagram of the existing reinforced node form in the patent documents with publication numbers CN110108151A and CN210004859U (the figure marks are deleted in the drawings, and the content of the drawings is retained).

[0024] Figure 3 This is a schematic diagram of the existing reinforced node form in the patent document with publication number CN208363297U (the figure marks are deleted in the figure, and the content of the figure is retained).

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model.

[0026] Figure 5 It is a schematic diagram of the structure of the utility model in the exploded state.

[0027] Figure 6 It is a schematic diagram of the longitudinal section structure of the utility model.

[0028] Figure 7 It is a schematic diagram of the transverse cross-sectional structure of the utility model.

[0029] Figure 8 This is a schematic diagram of the structure of the radial reinforcement plate of the utility model.

[0030] Fig. 9 This is a schematic diagram of the structure of the annular reinforcement plate of the utility model.

[0031] In the figure, 1-first circular steel tube, 2-second circular steel tube, 3-third circular steel tube, 4-fourth circular steel tube, 5-radial reinforcement plate, 6-circumferential reinforcement plate. DETAILED DESCRIPTION

[0032] This embodiment is a preferred implementation mode of the utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the utility model.

[0033] Based on the equal strength design principle, the utility model proposes a steel tube concrete reinforced node form, which is used to strengthen the weak parts of the cross steel tube concrete column structure and realize the structural design principle of "strong node, weak member".

[0034] Please refer to the attached Figure 4 To Attachment Fig. 9 The utility model protects a reinforced node for a cross steel tube concrete column for a cooling tower which is easy to construct. The reinforced node includes four steel pillars, a radial reinforcement plate 5 and an annular reinforcement plate 6. In this embodiment, the steel pillars are round steel pipes. When implemented specifically, other pillar steel structures such as square steel, channel steel, and I-beam steel can also be used. The four round steel pipes are respectively a first round steel pipe 1, a second round steel pipe 2, a third round steel pipe 3, and a fourth round steel pipe 4. The four round steel pipes are cut and then welded according to actual use conditions to form a cross steel pipe node with an "X"-shaped structure. The intersection angle formed between the two steel pipes located at the top, namely the first round steel pipe 1 and the second round steel pipe 2, is α, which changes with the change of the cooling tower body shape. In this embodiment, the angle α is 15°~30°. Due to the reduction of the cross steel pipe node area cross section, the bearing capacity is reduced, forming a weak part. The utility model proposes a reinforcement method with simple construction, conciseness and beauty for the node area where the cross steel tube concrete needs to be strengthened. The node reinforcement method mainly includes arranging reinforcing steel plates in the cross plane and outside the plane. In this embodiment, radial reinforcement plates 5 and annular reinforcement plates 6 are welded inside the cross steel pipe nodes, that is, radial reinforcement plates 5 and annular reinforcement plates 6 are arranged inside and outside the node intersection plane, and the inside of the four steel pillars and the reinforced node positions are filled with concrete.

[0035] In this embodiment, the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4 are welded together, and the connection parts of the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4 are formed by cutting, and the cutting is performed in the vertical direction and the horizontal direction respectively. Preferably, the focus of the cutting in the vertical direction and the horizontal direction is the center point passing through the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4, that is, the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4 are cut off in half in the vertical direction at the connection end surface position, so that the cross section of the intersection of the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4 is circular. In specific implementation, it can also be slightly more or slightly less.

[0036] In this embodiment, the reinforcing steel plate within the intersection plane is defined as an annular reinforcing plate 6 in the utility model because it is in the same annular direction as the cooling tower; the reinforcing steel plate outside the intersection plane is defined as a radial reinforcing plate 5 in the utility model because it is in the same radial direction as the cooling tower, and the radial reinforcing plate 5 is arranged perpendicular to the annular reinforcing plate 6.

[0037] In this embodiment, the shape of the annular reinforcement plate 6 is formed by mirroring an isosceles trapezoid along the short side, or in other words, the annular reinforcement plate 6 is formed by connecting the short sides of the isosceles trapezoid together, and the left and right side edges of the annular reinforcement plate 6 are directly welded to the inner wall of the corresponding steel pipe.

[0038] In this embodiment, the radial reinforcing plate 5 is elliptical or circular in shape as a whole, and the radial reinforcing plate 5 is split in the middle, and the middle position is welded to both sides of the annular reinforcing plate 6, and the left and right sides of the radial reinforcing plate 5 are directly connected to the corresponding steel pipes and welded to the inner wall of the corresponding outer steel pipe. The specific shape of the radial reinforcing plate 5 depends on the crossing angle α of the cross-concrete steel tubes, and is usually approximately an ellipse.

[0039] In the above embodiment, the radial reinforcing plate 5 is divided into two parts from the middle and then welded to the two sides of the annular reinforcing plate 6 as an example. In specific implementation, the annular reinforcing plate 6 can also be divided into two parts from the middle, the radial reinforcing plate 5 is a whole, and then the annular reinforcing plate 6 is welded to the two sides of the radial reinforcing plate 5.

[0040] In this embodiment, the thickness of the annular reinforcement plate 6 and the radial reinforcement plate 5 is determined by design, the thickness of the annular reinforcement plate 6 is defined as t1, the thickness of the radial reinforcement plate 5 is defined as t2, and the wall thickness of the first round steel tube 1, the second round steel tube 2, the third round steel tube 3 and the fourth round steel tube 4 is defined as t, then t1 and t2 are preferably twice t, that is, 2t. In the specific implementation process, if it is found that 2t does not meet the bearing capacity requirements, the values ​​of t1 and t2 can be re-determined according to the design principle that the node bearing capacity is greater than the component bearing capacity, such as: 3t, 4t, etc.

[0041] The utility model aims at the weak parts of the intersection nodes of the crossed steel tube concrete columns of the super-large cooling tower structure, and proposes a reinforced node and its design method that is easy to construct, simple and beautiful. The node has the following advantages: (1) The reinforced node does not have stiffening ribs inside the steel tube, which avoids the situation where multiple welds cross each other, simplifies the construction process, and is simple to manufacture. At the same time, the reinforced parts are not exposed outside the components, and the shape is beautiful. (2) Based on the principle of "strong node and weak component", the reinforced node of the utility model can be designed. The annular reinforcement plate and the radial reinforcement plate respectively increase the stiffness of the crossed steel tube concrete in-plane and out-of-plane, and also increase the steel content of the section, thereby increasing the bearing capacity of the node and making it safer and more reliable.

Claims

1. A cross steel tube concrete column reinforced node for a cooling tower that is easy to construct, characterized by: The reinforced node comprises four steel pillars, a radial reinforcement plate (5) and an annular reinforcement plate (6); the four steel pillars are welded to form an "X"-shaped cross-steel tube node; radial reinforcement plates (5) and annular reinforcement plates (6) are welded inside the cross-steel tube node; the inside of the four steel pillars and the inside of the reinforced node are filled with concrete.

2. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The steel support column is made of round steel pipe.

3. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 2 is characterized in that: The steel pillars are respectively a first round steel tube (1), a second round steel tube (2), a third round steel tube (3) and a fourth round steel tube (4), and the intersection angle between the two upper round steel tubes is α.

4. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 3 is characterized in that: The connection parts of the first round steel tube (1), the second round steel tube (2), the third round steel tube (3) and the fourth round steel tube (4) are cut in the vertical direction and the horizontal direction respectively, and the focus of the cutting in the vertical direction and the horizontal direction is the center point passing through the first round steel tube (1), the second round steel tube (2), the third round steel tube (3) and the fourth round steel tube (4).

5. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The annular reinforcement plate (6) is in the same annular direction as the cooling tower.

6. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The radial reinforcing plate (5) is in the same radial direction as the cooling tower.

7. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The radial reinforcement plate (5) and the annular reinforcement plate (6) are arranged perpendicularly.

8. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The shape of the annular reinforcement plate (6) is formed by mirroring an isosceles trapezoid along its short sides, and both side edges of the annular reinforcement plate (6) are directly welded to the inner side walls of the corresponding steel pillars.

9. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The radial reinforcement plate (5) is elliptical or circular, and both side edges of the radial reinforcement plate (5) are directly welded to the inner side walls of the corresponding steel pillars.

10. The cross steel tube concrete column reinforced node for cooling towers that is easy to construct according to claim 1 is characterized in that: The annular reinforcement plate (6) has a thickness of t1, and the radial reinforcement plate (5) has a thickness of t2.

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