A space grid and truss structure folding connection node and a construction method thereof

Abstract

The application discloses a space grid and truss structure folding connection node, which comprises a grid chord, a truss chord and a sleeve, the sleeve is sleeved on the truss chord, a ring long slot hole is formed in the truss chord, and the sleeve is connected with the ring long slot hole through a single-side bolt; a grid chord pull plate is welded on the grid chord, a grid chord butt plate is welded at the right end of the grid chord pull plate, a sleeve pull plate is welded on the sleeve, and a sleeve butt plate is welded at the right end of the sleeve pull plate; the grid chord pull plate and the sleeve pull plate are connected through a pull bolt, and the grid chord butt plate is connected with the sleeve butt plate through a splicing plate. The space grid and truss structure folding connection node is characterized in that sleeve, bolt connection and splicing plate connection are comprehensively used, the node has high rigidity, good stability and good mechanical properties, the structure is simple and intuitive, the node is convenient to construct, assemble and connect, and the long slot hole design of the bolt connection hole improves the construction fault tolerance of the node butt joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of truss structure, in particular to a space truss and truss structure folding connection node. BACKGROUND

[0002] With the development of China's economy and society and the improvement of civil engineering construction and scientific research level, large-span space truss and truss structure are widely used in public buildings such as stadiums, exhibition centers, high-speed railway station buildings and airport terminals, effectively driving the further development of local economy, sports and cultural tourism.

[0003] In order to fully exert the lightness and construction convenience of the truss structure and the large-span characteristics and arbitrary curved surface modeling advantages of the tubular truss structure, large-span space truss-tube truss hybrid structure has been applied to high-speed railway station buildings and other buildings requiring large bays and large spaces.

[0004] The chord and web members of the space truss structure are generally connected by bolted ball or welded ball, while the chord and web members of the space tube truss structure are generally connected by welded tube joints. Due to the different connection methods of the two types of space structure systems and the manufacturing and construction errors, the position deviation of the chord of the truss-tube hybrid structure at the folding point is large, and the precision cannot meet the requirements of bolted connection. Therefore, the connection method of the chord of the truss-tube hybrid structure at the folding point usually adopts butt welding. Construction units often use hydraulic jacks and code boards for forced position correction, and then perform high-altitude butt welding, but there are problems such as large amount of butt welding of members, high-altitude welding difficulty, high welding cost, serious stress concentration at the welding seam, and difficult to guarantee the welding quality. There is an urgent need to provide an efficient and safe connection method suitable for the folding of large-span space truss-tube hybrid structure.

[0005] Therefore, how to develop a new type of folding connection node for space truss and truss structure has become a problem to be solved by the technical personnel in the field. SUMMARY

[0006] The purpose of the present application is to provide a space truss and truss structure folding connection node, to solve the construction technical problems of the truss and truss connection node, and the problems of low construction efficiency, poor adjustment performance and poor bending resistance in the node connection construction.

[0007] To solve the above technical problems, the present application adopts the following technical solutions:

[0008] The application discloses a folding connecting joint of a space truss and a truss structure, which comprises a truss chord, a truss chord and a sleeve, the sleeve is sleeved on the truss chord, a circumferential long slot hole matched with the sleeve is formed on the peripheral surface of the truss chord, and the sleeve is connected with the circumferential long slot hole through a single-side bolt; a truss chord pull plate is welded on the truss chord, a truss chord butt plate is welded at the right end of the truss chord pull plate, a sleeve pull plate is welded on the sleeve, and a sleeve butt plate is welded at the right end of the sleeve pull plate; the truss chord pull plate and the sleeve pull plate are connected through a pull bolt, and the truss chord butt plate is connected with the sleeve butt plate through a splicing plate.

[0009] Further, a plurality of longitudinal long slot holes are formed on the splicing plate, bolt holes matched with the longitudinal long slot holes are formed on the truss chord butt plate, the truss chord butt plate is connected with the longitudinal long slot holes on the splicing plate through high-strength bolts, bolt holes matched with the longitudinal long slot holes are formed on the sleeve butt plate, and the sleeve butt plate is connected with the longitudinal long slot holes on the splicing plate through high-strength bolts.

[0010] Further, a truss chord stiffening rib is welded at the left end of the truss chord pull plate, and a sleeve stiffening rib is welded at the left end of the sleeve pull plate.

[0011] Further, first bolt holes matched with the pull bolt are formed on the truss chord pull plate, and second bolt holes matched with the pull bolt are formed on the sleeve pull plate.

[0012] Further, the truss chord pull plate is in a fan shape, four truss chord pull plates are welded on the peripheral surface of the truss chord in a 90° circumferential mode, the sleeve pull plate is in a fan shape, and four sleeve pull plates are welded on the sleeve in a 90° circumferential mode.

[0013] Further, four longitudinal long slot holes are formed on the splicing plate.

[0014] Further, the truss chord stiffening rib and the truss chord butt plate are both in a trapezoidal shape, the truss chord stiffening rib and the truss chord butt plate are vertically welded at the left and right ends of the truss chord pull plate, the sleeve stiffening rib and the sleeve butt plate are both in a trapezoidal shape, and the sleeve stiffening rib and the sleeve butt plate are vertically welded at the left and right ends of the sleeve pull plate.

[0015] Further, the truss chord and the truss chord are of the same outer diameter, and the inner diameter of the sleeve is larger than the outer diameter of the truss chord.

[0016] Further, the upper surface of the net rack chord member pull connection plate is welded with the lower end surface of the net rack chord member stiffening rib and the net rack chord member butt plate, and the lower surface of the net rack chord member pull connection plate is flush with the lower end surface of the net rack chord member; the upper surface of the sleeve pull connection plate is welded with the lower end surface of the sleeve stiffening rib and the sleeve butt plate, the upper end surface of the sleeve stiffening rib and the sleeve butt plate is flush with the upper end surface of the sleeve, and the lower surface of the sleeve pull connection plate is not flush with the lower end surface of the sleeve.

[0017] A construction method of a space net rack and truss structure folding connection node, characterized in that it comprises the following steps:

[0018] S1, the sleeve is sleeved on one end of the truss chord member, the single-sided bolt is passed through the bolt hole on the sleeve and the ring-shaped long slot hole on the truss chord member, and then it is preliminarily tightened on the outside to connect the two together;

[0019] S2, the sleeve is rotated through the ring-shaped long slot hole on the sleeve, so that the first bolt hole on the net rack chord member pull connection plate and the second bolt hole on the sleeve pull connection plate are on a straight line, and the construction error of the net rack chord member and the truss chord member in the ring direction is eliminated;

[0020] S3, the tension bolt is passed through the first bolt hole on the net rack chord member pull connection plate and the second bolt hole on the sleeve pull connection plate and then tightened, so as to realize the longitudinal butt joint of the net rack chord member and the truss chord member;

[0021] S4, the high-strength bolt is passed through the longitudinal long slot hole on the splicing plate, the bolt hole on the net rack chord member butt plate, and the bolt hole on the sleeve butt plate and then tightened, the longitudinal long slot hole on the splicing plate is used to adapt to the construction error of the net rack chord member and the truss chord member in the longitudinal direction, and the reinforced butt joint of the net rack chord member and the truss chord member is realized.

[0022] Compared with the prior art, the beneficial technical effects of the present application are:

[0023] 1. The bolt connection is adopted between the space net rack chord member and the truss chord member, the assembly efficiency is high, the connection is safe and reliable, the problems of large work load, difficult to guarantee the welding quality and high welding cost of high-altitude butt welding are avoided;

[0024] 2. By opening the ring-shaped long slot hole on the truss chord member, the sleeve can be rotated along the truss chord member in a limited ring direction, so as to adapt to the problem that the net rack chord member pull connection plate and its stiffening rib and butt plate and the sleeve pull connection plate and its stiffening rib and butt plate are not on a straight line due to the construction error of the net rack chord member and the truss chord member, and then the bolt connection cannot be carried out;

[0025] 3. The longitudinal butt joint of the net rack stringer and the truss stringer is realized by the pull bolt, when the net rack stringer and the truss stringer exist gap in the longitudinal direction due to construction error, the longitudinal long slot hole on the splicing plate can be used for adjustment, and the splicing plate is spliced and connected with the net rack stringer butt joint plate and the sleeve butt joint plate.

[0026] 4. The axial load between the net rack stringer and the truss stringer is borne and transmitted by the pull bolt, the bending moment and the shear force are borne and transmitted by the splicing plate, the stress is clear, and the design is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0027] The application will be further described below in combination with the drawings:

[0028] Figure 1 It is an explosion view of the space net rack and truss structure jointing connection node of the application;

[0029] Figure 2 It is a cooperation view of the splicing plate and the net rack stringer;

[0030] Figure 3 It is a sleeve axonometric view;

[0031] Figure 4 It is a truss stringer elevation view;

[0032] Figure 5 It is a net rack stringer plan view;

[0033] Figure 6 It is a sleeve plan view;

[0034] Figure 7 It is a connection view of the space net rack and truss structure jointing connection node of the application.

[0035] The drawing mark explanation: 1, net rack stringer; 2, truss stringer; 3, sleeve; 4, net rack stringer pull plate; 5, sleeve pull plate; 6, net rack stringer stiffening rib; 7, sleeve stiffening rib; 8, net rack stringer butt joint plate; 9, sleeve butt joint plate; 10, splicing plate; 11, single-side bolt; 12, high-strength bolt; 13, pull bolt; 14, longitudinal long slot hole; 15, first bolt hole; 16, ring long slot hole; 17, second bolt hole. DETAILED DESCRIPTION

[0036] As shown in Figures 1 to 7 A space net rack and truss structure jointing connection node comprises a net rack stringer 1, a truss stringer 2 and a sleeve 3. The outer diameter of the net rack stringer 1 is same as that of the truss stringer 2, and the inner diameter of the sleeve 3 is greater than the outer diameter of the truss stringer 2.

[0037] The sleeve 3 is sleeved on the truss chord 2, the peripheral surface of the truss chord 2 is provided with a circumferential long slot hole 16 matched with the sleeve 3, and the sleeve 3 is connected with the circumferential long slot hole 16 through a single-side bolt 11.

[0038] The four groups of circumferential long slot holes 16 are distributed at 90 degrees on the truss chord 2, and each group of circumferential long slot holes 16 comprises two circumferential long slot holes 16 arranged vertically.

[0039] The bolt hole corresponding to the circumferential long slot hole 16 on the sleeve 3 is arranged at the gap of the sleeve pull plate 5, so as to avoid affecting the installation of the pull bolt 13.

[0040] The truss chord pull plate 4 is welded on the truss chord 1, the truss chord butt plate 8 is welded at the right end of the truss chord pull plate 4, the sleeve pull plate 5 is welded on the sleeve 3, and the sleeve butt plate 9 is welded at the right end of the sleeve pull plate 5. The truss chord stiffening rib 6 is welded at the left end of the truss chord pull plate 4, and the sleeve stiffening rib 7 is welded at the left end of the sleeve pull plate 5.

[0041] Specifically, the truss chord pull plate 4 is fan-shaped, and four truss chord pull plates 4 are welded at 90 degrees on the peripheral surface of the truss chord 1 in a circumferential direction; the sleeve pull plate 5 is fan-shaped, and four sleeve pull plates 5 are welded on the sleeve 3 in a circumferential direction at 90 degrees.

[0042] Specifically, the truss chord stiffening rib 6 and the truss chord butt plate 8 are trapezoidal, which can better bear shear force and bending moment, can better save materials, reduce expenses, and can be more beautiful. The truss chord stiffening rib 6 and the truss chord butt plate 8 are vertically welded at the left and right ends of the truss chord pull plate 4; the sleeve stiffening rib 7 and the sleeve butt plate 9 are trapezoidal, and the sleeve stiffening rib 7 and the sleeve butt plate 9 are vertically welded at the left and right ends of the sleeve pull plate 5.

[0043] The upper surface of the truss chord pull plate 4 is welded and matched with the lower end surfaces of the truss chord stiffening rib 6 and the truss chord butt plate 8, and the lower surface of the truss chord pull plate 4 is flush with the lower end surface of the truss chord 1; the upper surface of the sleeve pull plate 5 is welded and matched with the lower end surfaces of the sleeve stiffening rib 7 and the sleeve butt plate 9, the upper end surfaces of the sleeve stiffening rib 7 and the sleeve butt plate 9 are flush with the upper end surface of the sleeve 3, and the lower surface of the sleeve pull plate 5 is not flush with the lower end surface of the sleeve 3, and the distance from the lower end of the sleeve 3 is not less than 300 mm.

[0044] The net rack chord pull plate 4 is connected with the sleeve pull plate 5 through the tensioning bolt 13, the first bolt hole 15 is formed in the net rack chord pull plate 4 and matched with the tensioning bolt 13, and the second bolt hole 17 is formed in the sleeve pull plate 5 and matched with the tensioning bolt 13.

[0045] Since the sleeve pull plate 5 is welded on the surface of the sleeve 3, the distance from the bolt hole center of the sleeve butt plate 9 to the outer surface of the sleeve 3 is equal to the distance from the bolt hole center of the net rack chord butt plate 8 to the outer surface of the net rack chord 1 minus the wall thickness of the sleeve 3.

[0046] The net rack chord butt plate 8 is connected with the sleeve butt plate 9 through the splicing plate 10.

[0047] A plurality of longitudinal long slot holes 14 are formed in the splicing plate 10, and specifically, four longitudinal long slot holes 14 are formed in the splicing plate 10.

[0048] Two bolt holes matched with the longitudinal long slot hole 14 are formed in the net rack chord butt plate 8, the net rack chord butt plate 8 is connected with the longitudinal long slot hole 14 of the splicing plate 10 through the high-strength bolt 12, two bolt holes matched with the longitudinal long slot hole 14 are formed in the sleeve butt plate 9, and the sleeve butt plate 9 is connected with the longitudinal long slot hole 14 of the splicing plate 10 through the high-strength bolt 12.

[0049] The length of the splicing plate 10 is about the sum of the heights of the sleeve butt plate 9 and the net rack chord butt plate 8, similar height can save time for positioning of the bolt hole, and can also bear bending moment and shear force in the splicing joint.

[0050] The construction method of the folding connection joint of the space net rack and the truss structure comprises the following steps:

[0051] S1, the sleeve 3 is sleeved on one end of the truss chord 2, the single-sided bolt 11 is passed through the bolt hole on the sleeve 3 and the circumferential long slot hole 16 on the truss chord 2, and then the sleeve 3 is preliminarily tightened on the outside to connect the sleeve 3 and the truss chord 2 together;

[0052] S2, the sleeve 3 is rotated through the circumferential long slot hole 16 on the sleeve 3, so that the first bolt hole 15 on the net rack chord pull plate 4 and the second bolt hole 17 on the sleeve pull plate 5 are on a straight line, and the construction error of the net rack chord 1 and the truss chord 2 in the circumferential direction is eliminated;

[0053] S3, the tensioning bolt 13 is passed through the first bolt hole 15 on the net rack chord pull plate 4 and the second bolt hole 17 on the sleeve pull plate 5 and then is tightened, so that the longitudinal butt joint of the net rack chord 1 and the truss chord 2 is realized;

[0054] S4, through the high-strength bolt 12 through the splice plate 10 on the longitudinal long slot hole 14, web stringer butt plate 8 on the bolt hole, sleeve butt plate 9 on the bolt hole after tightening, splice plate 10 on the longitudinal long slot hole 14 for the web stringer 1 and truss stringer 2 in the longitudinal construction error, realize the web stringer 1 and truss stringer 2 strengthen butt joint.

[0055] The above-described embodiments are merely preferred modes of the present application and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the scope of protection of the present application as defined by the claims.

Claims

1. A connection node between a space grid and a truss structure, characterized by: The invention comprises a truss chord (1), a truss chord (2) and a sleeve (3), wherein the sleeve (3) is sleeved on the truss chord (2), and a circumferential long slot (16) cooperating with the sleeve (3) is provided on the circumferential surface of the truss chord (2), and the sleeve (3) is connected to the circumferential long slot (16) by a single-sided bolt (11); a truss chord tie plate (4) is welded to the truss chord (1), and a truss chord butt plate (8) is welded to the right end of the truss chord tie plate (4); a sleeve tie plate (5) is welded to the sleeve (3), and a sleeve butt plate (9) is welded to the right end of the sleeve tie plate (5); the truss chord tie plate (4) and the sleeve tie plate (5) are connected by tension bolts (13), and the truss chord butt plate (8) is connected to the truss chord by a splicing plate (10). The sleeve butt joint plate (9) is connected; the splicing plate (10) is provided with a plurality of longitudinal long slots (14); the grid chord butt joint plate (8) is provided with bolt holes that match the longitudinal long slots (14); the grid chord butt joint plate (8) is connected to the longitudinal long slots (14) on the splicing plate (10) through high-strength bolts (12); the sleeve butt joint plate (9) is provided with bolt holes that match the longitudinal long slots (14); the sleeve butt joint plate (9) is connected to the longitudinal long slots (14) on the splicing plate (10) through high-strength bolts (12); the grid chord tension plate (4) is provided with a first bolt hole (15) that matches the tension bolt (13); the sleeve tension plate (5) is provided with a second bolt hole (17) that matches the tension bolt (13).

2. The space grid and truss structure folding connection node according to claim 1, characterized in that: A grid chord stiffening rib (6) is welded to the left end of the grid chord tie plate (4), and a sleeve stiffening rib (7) is welded to the left end of the sleeve tie plate (5).

3. The space grid and truss structure folding connection node according to claim 1 is characterized in that: The grid chord tie plates (4) are fan-shaped, and the four grid chord tie plates (4) are circumferentially welded at 90° to the circumference of the grid chord (1); the sleeve tie plates (5) are fan-shaped, and the four sleeve tie plates (5) are circumferentially welded at 90° to the sleeve (3).

4. The space grid and truss structure folding connection node according to claim 1, characterized in that: Four longitudinal slots (14) are provided on the splicing plate (10).

5. The space grid and truss structure folding connection node according to claim 2, characterized in that: The grid chord stiffening ribs (6) and the grid chord butt joint plates (8) are both trapezoidal, and the grid chord stiffening ribs (6) and the grid chord butt joint plates (8) are vertically welded to the left and right ends of the grid chord tension plate (4); the sleeve stiffening ribs (7) and the sleeve butt joint plates (9) are both trapezoidal, and the sleeve stiffening ribs (7) and the sleeve butt joint plates (9) are vertically welded to the left and right ends of the sleeve tension plate (5).

6. The space grid and truss structure folding connection node according to claim 1 is characterized by: The outer diameters of the grid chord (1) and the truss chord (2) are the same, and the inner diameter of the sleeve (3) is larger than the outer diameter of the truss chord (2).

7. The space grid and truss structure folding connection node according to claim 2, characterized in that: The upper surface of the truss chord tie plate (4) is welded to the lower end surface of the truss chord stiffening rib (6) and the truss chord butt plate (8), and the lower surface of the truss chord tie plate (4) is flush with the lower end surface of the truss chord (1); the upper surface of the sleeve tie plate (5) is welded to the lower end surface of the sleeve stiffening rib (7) and the sleeve butt plate (9), and the upper end surface of the sleeve stiffening rib (7) and the sleeve butt plate (9) is flush with the upper end surface of the sleeve (3), and the lower surface of the sleeve tie plate (5) is not flush with the lower end surface of the sleeve (3).

8. A construction method for connecting nodes of a space grid and a truss structure using any one of claims 1 to 7, characterized in that The steps include: S1. Insert the sleeve (3) into one end of the truss chord (2), pass a single-sided bolt (11) through the bolt hole on the sleeve (3) and the circumferential long slot hole (16) on the truss chord (2), and then preliminarily tighten them on the outside to connect the two together; S2, rotating the sleeve (3) through the circumferential long slot (16) on the sleeve (3) so that the first bolt hole (15) on the truss chord connecting plate (4) and the second bolt hole (17) on the sleeve connecting plate (5) are in a straight line, thereby eliminating the construction error of the truss chord (1) and the truss chord (2) in the circumferential direction; S3, passing the tension bolts (13) through the first bolt holes (15) on the truss chord connecting plate (4) and the second bolt holes (17) on the sleeve connecting plate (5), and then tightening them to achieve longitudinal docking of the truss chord (1) and the truss chord (2); S4. High-strength bolts (12) are passed through the longitudinal slots (14) on the splicing plate (10), the bolt holes on the grid chord butt joint plate (8), and the bolt holes on the sleeve butt joint plate (9) and then tightened. The longitudinal slots (14) on the splicing plate (10) are used to adapt to the longitudinal construction errors of the grid chord (1) and the truss chord (2), thereby achieving the reinforced butt joint of the grid chord (1) and the truss chord (2).

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