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CN-224213512-U - Large-size welded hollow ball steel node

CN224213512UCN 224213512 UCN224213512 UCN 224213512UCN-224213512-U

Abstract

The utility model belongs to the field of building steel structures, and provides a large-size welded hollow ball steel node which comprises a main stay bar, welded hollow balls, six lower chords, four diagonal web members and a vertical web member, wherein the welded hollow balls comprise arc steel plates, horizontal stiffening ribs and vertical stiffening ribs. The welding hollow ball is arranged at the top end of the main supporting rod, and the six lower chords, the four diagonal web members and the vertical web member are respectively connected to the welding hollow ball at specific space angles to form effective connection of the main rod member and the secondary rod member. According to the steel node, the large-size welding hollow balls are additionally arranged at the node connection positions, so that economy is realized, the support rods can be effectively connected with the main rod, the problem of overlapping of welding seams among the support rods can be avoided, stress concentration is avoided, the steel node can be well applied to the node connection positions with larger primary and secondary rod sizes, meanwhile, the strength of the node position can be effectively ensured by changing the size, the wall thickness and the internal construction measures of the welding hollow balls, and the construction measures of the strong node are met.

Inventors

  • MA WEN
  • ZHANG KE
  • XIAO YAN

Assignees

  • 中信建筑设计研究总院有限公司

Dates

Publication Date
20260508
Application Date
20250411

Claims (5)

  1. 1. The large-size welded hollow ball steel node is characterized by comprising a main stay bar (1), a welded hollow ball (2), a lower chord member a (3), an inclined web member a (4), a lower chord member b (5), an inclined web member b (6), a lower chord member c (7), a vertical web member (8), a lower chord member d (9), an inclined web member c (10), a lower chord member e (11), an inclined web member d (12) and a lower chord member f (13); The vertical web member (8) is vertically arranged, the lower end of the vertical web member (8) is fixedly connected with the welding hollow ball (2), the axis of the vertical web member (8) is fixedly connected with the welding hollow ball (2) through the centroid of the welding hollow ball, the upper end of the main support rod (1) is fixedly connected with the welding hollow ball (2), the axis of the main support rod (1) is fixedly connected with the centroid of the welding hollow ball (2), and an included angle formed by the main support rod (1) and the vertical web member (8) is 160-180 degrees; The lower chord member a (3), the inclined web member a (4), the lower chord member b (5), the inclined web member b (6), the lower chord member c (7), the lower chord member d (9), the inclined web member c (10), the lower chord member e (11), the inclined web member d (12) and the lower chord member f (13) are fixedly connected with the welded hollow ball (2); The axes of the lower chord member a (3), the inclined web member a (4), the lower chord member b (5), the inclined web member b (6), the lower chord member c (7), the lower chord member d (9), the inclined web member c (10), the lower chord member e (11), the inclined web member d (12) and the lower chord member f (13) are all welded with the centroids of the hollow spheres (2); the lower chord member a (3), the inclined web member a (4), the lower chord member b (5), the inclined web member b (6) and the lower chord member c (7) are positioned on the same side of the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned, and the lower chord member d (9), the inclined web member c (10), the lower chord member e (11), the inclined web member d (12) and the lower chord member f (13) are positioned on the other side of the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned; The lower chord member a (3), the inclined web member a (4) and the vertical web member (8) are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 40-50 degrees, the included angle between the inclined web member a (4) and the vertical web member (8) is 30-60 degrees, and the included angle between the lower chord member a (3) and the vertical web member (8) is 90-100 degrees; The lower chord member b (5), the inclined web member b (6) and the vertical web member (8) are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 85-95 degrees, the included angle between the inclined web member b (6) and the vertical web member (8) is 30-60 degrees, and the included angle between the lower chord member b (5) and the vertical web member (8) is 90-100 degrees; The lower chord member c (7) and the vertical web member (8) are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 130-140 degrees, and the included angle between the lower chord member c (7) and the vertical web member (8) is 80-90 degrees; The lower chord member d (9) and the vertical web member (8) are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 40-50 degrees, and the included angle between the lower chord member d (9) and the vertical web member (8) is 80-90 degrees; The inclined web member c (10), the lower chord member e (11) and the vertical web member (8) are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 85-95 degrees, the included angle between the inclined web member c (10) and the vertical web member (8) is 30-60 degrees, and the included angle between the lower chord member e (11) and the vertical web member (8) is 90-100 degrees; The inclined web member d (12), the lower chord member f (13) and the vertical web member (8) are positioned on the same vertical plane, an included angle between the plane and the vertical plane where the main stay bar (1) and the vertical web member (8) are positioned is 130-140 degrees, an included angle between the inclined web member d (12) and the vertical web member (8) is 30-60 degrees, and an included angle between the lower chord member f (13) and the vertical web member (8) is 90-100 degrees.
  2. 2. The large-size welded hollow ball steel node according to claim 1, wherein the main stay (1), the lower chord a (3), the diagonal web member a (4), the lower chord b (5), the diagonal web member b (6), the lower chord c (7), the vertical web member (8), the lower chord d (9), the diagonal web member c (10), the lower chord e (11), the diagonal web member d (12) and the lower chord f (13) are all round steel pipes.
  3. 3. The large-size welded hollow ball steel node according to claim 1, wherein the welded hollow ball (2) comprises a horizontal stiffening rib (15), two vertical stiffening ribs (16) and four circular arc steel plates (14), the horizontal stiffening rib (15) is a circular steel plate, the vertical stiffening ribs (16) are arranged on the upper side and the lower side of the horizontal stiffening rib (15), the vertical stiffening ribs (16) are semicircular steel plates, the vertical stiffening ribs (16) are perpendicular to the horizontal stiffening ribs (15), four included angle areas are formed between the horizontal stiffening ribs (15) and the two vertical stiffening ribs (16), the four circular arc steel plates (14) are respectively arranged in the four included angle areas, and the circular arc steel plates (14) are respectively fixedly connected with the horizontal stiffening ribs (15) of the same included angle areas and the vertical stiffening ribs (16) of the same included angle areas.
  4. 4. A welded hollow sphere steel joint of large size according to claim 3, characterized in that the circular arc steel plate (14) is welded and fixed with the horizontal stiffening rib (15) of the same included angle area and the vertical stiffening rib (16) of the same included angle area respectively.
  5. 5. The large-size welded hollow ball steel node according to claim 1, wherein the main stay (1), the welded hollow ball (2), the lower chord a (3), the diagonal web a (4), the lower chord B (5), the diagonal web B (6), the lower chord c (7), the vertical web (8), the lower chord d (9), the diagonal web c (10), the lower chord e (11), the diagonal web d (12) and the lower chord f (13) are all Q235B steel plates or Q355B steel plates.

Description

Large-size welded hollow ball steel node Technical Field The utility model belongs to the field of building steel structures, and particularly relates to a large-size welded hollow ball steel node. Background In the steel roof design of the three-dimensional space grid structure system, the condition that a plurality of rods are intersected at one point is easy to occur at the intersection position of the chord members, the vertical web members and the inclined web members, particularly, at some key supporting positions, more than ten chord members, vertical web members and inclined web members are intersected at one point and are connected with the main supporting rods, so that critical nodes with main and secondary stress and huge quantity of rods are often needed to be solved by some special construction measures. According to the requirements of building functions and beauty, the solutions commonly used at present are as follows: ① The section of the main pipe is enlarged to form primary and secondary parts, and meanwhile, secondary rods can be welded on the main pipe in a staggered manner, but the steel consumption is obviously increased, and unnecessary waste is caused; ② Cast steel nodes are adopted, the mould is customized and opened in a factory, and casting is carried out once, but the mode has long manufacturing period and higher cost, and in addition, the mode needs differential mould opening manufacturing for the nodes with a large number of nodes and differentiation, so that the processing cost is further increased. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model provides a large-size welded hollow ball steel node, and aims to provide an economical and reliable node solution. In order to achieve the aim, the technical scheme is that the large-size welded hollow ball steel node comprises a main stay bar, a welded hollow ball, a lower chord member a, an inclined web member a, a lower chord member b, an inclined web member b, a lower chord member c, a vertical web member, a lower chord member d, an inclined web member c, a lower chord member e, an inclined web member d and a lower chord member f; the vertical web member is vertically arranged, the lower end of the vertical web member is fixedly connected with the welding hollow ball, the axis of the vertical web member is fixedly connected with the welding hollow ball through the welding hollow ball center, the upper end of the main support rod is fixedly connected with the welding hollow ball, the axis of the main support rod is through the welding hollow ball center, and an included angle formed by the main support rod and the vertical web member is 160-180 degrees; the lower chord member a, the diagonal web member a, the lower chord member b, the diagonal web member b, the lower chord member c, the lower chord member d, the diagonal web member c, the lower chord member e, the diagonal web member d and the lower chord member f are fixedly connected with the welding hollow ball; The axes of the lower chord member a, the diagonal web member a, the lower chord member b, the diagonal web member b, the lower chord member c, the lower chord member d, the diagonal web member c, the lower chord member e, the diagonal web member d and the lower chord member f are all hollow sphere centers through welding; The lower chord member a, the inclined web member a, the lower chord member b, the inclined web member b and the lower chord member c are positioned on the same side of the vertical plane where the main supporting rod and the vertical web member are positioned, and the lower chord member d, the inclined web member c, the lower chord member e, the inclined web member d and the lower chord member f are positioned on the other side of the vertical plane where the main supporting rod and the vertical web member are positioned; the lower chord member a, the inclined web member a and the vertical web member are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar and the vertical web member are positioned is 40-50 degrees, the included angle between the inclined web member a and the vertical web member is 30-60 degrees, and the included angle between the lower chord member a and the vertical web member is 90-100 degrees; the lower chord member b, the inclined web member b and the vertical web member are positioned on the same vertical plane, the included angle between the plane and the vertical plane where the main stay bar and the vertical web member are positioned is 85-95 degrees, the included angle between the inclined web member b and the vertical web member is 30-60 degrees, and the included angle between the lower chord member b and the vertical web member is 90-100 degrees; The lower chord member c and the vertical web member are positioned on the same vertical plane, the included angle between the plane and the vertical plane where th