Full-assembly type core column node aluminum alloy space grid structure

Abstract

The invention relates to a full-assembly type core column node aluminum alloy space grid structure, and belongs to the technical field of space grid structures, the full-assembly type core column node aluminum alloy space grid structure comprises N chord member layers and N-1 web member layers, and the number N of the chord member layers is equal to 1, 2, 3 and 4; each chord member in the chord member layer is an I-shaped aluminum alloy rod piece which is called I-shaped aluminum for short, the I-shaped aluminum rod pieces are intersected at a connecting node according to a certain rule, that is, m (m is equal to 4, 5, 6, 7 and 8) rod pieces are intersected at one connecting node to form the chord member layer, and the connecting nodes of different chord member layers are connected through vertical core columns; the part, extending into the chord member layers, of the vertical core column is connected with the intersecting chord members to form the assembly type core column joint, the part, located between the chord member layers, of the vertical core column is called as a web member, and all the web members jointly form a web member layer. The device has the characteristics of simple structure, large bearing capacity, good stability, clear force transmission and full assembly. The problem that an aluminum alloy space grid cannot be applied to large-span and large-load conditions is solved.

Description

Technical Field

[0001] The invention relates to the technical field of space grid structures, and in particular to a fully assembled core column node aluminum alloy space grid structure. Background Art

[0002] Aluminum alloy materials have the advantages of light weight, high strength, and good corrosion resistance. They are gradually being used in public buildings and industrial fields. Common ones include skylights and large oil tank grid shell covers. Compared with steel, the significant disadvantage of aluminum alloy is its poor weldability and elastic modulus is only one-third of that of steel. At present, its application scope in the construction field is mainly small and medium-span spatial structures. The structural form is mainly single-layer spatial grid structure using American Temcor nodes, and some are double-layer spatial grid structures using aluminum alloy bolt balls or hub nodes. However, due to factors such as connection form and force requirements, this type of structure is rarely used in actual engineering. It can be seen that the existing aluminum alloy spatial grid structure has some problems both in node construction and structural form, such as:

[0003] The single-layer aluminum alloy spatial grid structure using Temcor nodes is mainly a single-layer grid structure with a certain curvature. This structure as a whole is mainly subjected to the internal force of the membrane, that is, the internal force of the structure is mainly axial. Therefore, in terms of the node structure, the upper and lower flanges of each I-shaped aluminum alloy rod are connected in order with fasteners through the cover plate, and then the external load on the overall structure is transferred to the foundation; while the webs of each I-shaped aluminum alloy member are discontinuous and unconnected, the out-of-plane bending stiffness of the node is very weak, and the structure cannot withstand a slightly larger out-of-plane load; at the same time, since the single-layer lattice shell structure is mainly for stability control, the node stiffness is weak, and the elastic modulus of the material is low, the structure is mostly used in structures with small and medium spans that meet certain curvature requirements.

[0004] Some double-layer aluminum alloy spatial structure grid structures using bolt ball nodes or hub nodes are mainly flat-plate or small curvature grid structures. Since the double-layer structure can play the role of the geometric stiffness of the structure, this structure usually has better out-of-plane stiffness than the single-layer grid structure. However, since the rods and the cover plates or cone heads in the currently used bolt nodes are connected by mechanical molding or welding, the material strength is reduced by 30% to 50%, resulting in the structure being unable to withstand large loads and it is difficult to give full play to the advantages of aluminum alloy materials. The grid structure using hub nodes has a small distance between the upper and lower layers, weak structural stiffness, and poor overall stability. Summary of the invention

[0005] The present invention mainly solves the shortcomings of the existing aluminum alloy space grid structure in the prior art, such as small structural bearing capacity, small span, weak overall stiffness and weak node stiffness, single structural form, single force form, limited load conditions, and inability to meet the needs of multi-layer space structure systems. It provides a fully assembled core column node aluminum alloy space grid structure, which has the characteristics of simple structure, large bearing capacity, good stability, clear force transmission and full assembly. It solves the problem that the aluminum alloy space grid cannot be applied to large span and large load conditions.

[0006] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0007] A fully assembled core column node aluminum alloy space grid structure comprises N chord layers and N-1 web layers, wherein the number of chord layers is N=1, 2, 3, 4; each chord in the chord layer is an I-shaped aluminum alloy rod, referred to as I-shaped aluminum, and each I-shaped aluminum rod intersects at a connection node according to a certain rule, that is, every m (m=4, 5, 6, 7, 8) rods converge at a connection node to form a chord layer, and each connection node of different chord layers is connected by a vertical core column; the part of the vertical core column extending into the chord layer and connected with each intersecting chord is called an assembled core column node, the part of the vertical core column located between each chord layer is called a web, and all the webs together constitute a web layer. The assembled core column node includes a core column, an upper ring plate, a lower ring plate, angle aluminum fasteners, a connecting plate and fasteners. The upper flange and the lower flange of each I-shaped aluminum rod in the chord layer are respectively connected to the upper ring plate and the lower ring plate through fasteners. The web of the I-shaped aluminum rod is connected to the corresponding core column limbs with two connecting plates through fasteners. The upper ring plate and the lower ring plate are respectively connected to the core column limbs through angle aluminum fasteners.

[0008] Preferably, the structure is designed to be a single-layer, double-layer, triple-layer or quadruple-layer space grid structure according to needs; that is, the number of chord rod layers N=1, 2, 3, 4.

[0009] Preferably, the maximum value of the chord layer number N is not limited to 4, or is greater than 4.

[0010] Preferably, the assembled core-column node aluminum alloy spatial grid structure is in the form of a sphere, a cylinder, a parabola or a free-form surface.

[0011] As a preference, the composition rule of each I-shaped aluminum rod is selected in the following manner according to the number of rods m that converge at a point:

[0012]

[0013] Preferably, the core column is composed of inner cross ribs, ring ribs and limbs; the core column contains m limbs, that is, the number of limbs is consistent with the number of rods where the chord layer converges at one point; the length of the core column can be arbitrarily stretched and extended according to the number of chord layers of the aluminum alloy space grid structure to meet the needs of space grid structures with different numbers of layers.

[0014] Preferably, the fasteners are ordinary bolts, high-strength bolts or ring-groove rivets; the material of the fasteners is steel, stainless steel, aluminum alloy or titanium alloy.

[0015] The present invention can achieve the following effects:

[0016] The present invention provides a fully assembled core column node aluminum alloy space grid structure, which has the characteristics of simple structure, large bearing capacity, good stability, clear force transmission and full assembly compared with the prior art, solving the problem that the aluminum alloy space grid cannot be applied to large span and large load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric diagram of the three-layer assembled core column node aluminum alloy space grid structure of the present invention.

[0018] Figure 2 It is a partial cross-sectional view of the three-layer assembled core column node aluminum alloy space grid structure of the present invention.

[0019] Figure 3 It is a plane projection diagram of the chord layer of the aluminum alloy space grid structure when m=6 of the present invention.

[0020] Figure 4 It is a plane projection diagram of the assembled core column node of the present invention.

[0021] Figure 5 It is a perspective view of the assembled core column node of the present invention.

[0022] Figure 6 It is a schematic diagram of the core column of the assembled core column node of the present invention.

[0023] Figure 7 It is a schematic diagram of the upper ring plate and the lower ring plate of the assembled core column node of the present invention.

[0024] Figure 8 It is an axonometric diagram of the double-layer linked square aluminum alloy space grid structure of the present invention.

[0025] Fig. 9 It is a cross-sectional view of the double-layered square aluminum alloy space grid structure of the present invention.

[0026] Fig.10 It is a partial entity diagram of the double-layer linked square aluminum alloy space grid structure of the present invention.

[0027] Fig.11 It is a plane projection diagram of the chord layer of the double-layer linked square aluminum alloy space grid structure of the present invention.

[0028] Fig.12 It is a perspective view of the assembled core column node when m=4 of the present invention.

[0029] Fig.13 It is the rib-ring type aluminum alloy space grid structure of the present invention when the single layer m=4.

[0030] Fig.14 It is a plane projection diagram of the rib-ring type aluminum alloy space grid structure when the single layer m=4 of the present invention.

[0031] Fig.15 It is a vertical deformation diagram of the assembled core column node aluminum alloy space grid structure of the present invention when three layers m=4.

[0032] Fig.16 This is the first-order vibration mode of the assembled core column node aluminum alloy spatial grid structure of the present invention when three layers m=4.

[0033] Fig.17 This is the second-order vibration mode of the assembled core column node aluminum alloy space grid structure of the present invention when three layers m=4.

[0034] Fig.18 This is the third-order vibration mode of the assembled core column node aluminum alloy space grid structure of the present invention when three layers m=4.

[0035] Fig.19 It is the nonlinear stability coefficient of the assembled core column node aluminum alloy space grid structure of the present invention when three layers m=4.

[0036] Fig. 20 It is a stress cloud diagram of the assembled core column node of the present invention.

[0037] Fig.21 The bearing capacity comparison between the fabricated core column node of the present invention and the Temcor node is shown in FIG.

[0038] Fig. 22 The figure is a comparison of the stiffness of the assembled core column node of the present invention and the Temcor node.

[0039] In the figure: chord layer 1, web layer 2, assembled core column node 3, chord 4, core column 5, upper ring plate 6, lower ring plate 7, angle aluminum fastener 8, connecting plate 9, fastener 10, inner cross rib 11, ring rib 12, limb 13, upper flange 14, lower flange 15, web 16, bolt hole 17, vertical web 18. DETAILED DESCRIPTION

[0040] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0041] Embodiment 1: A fully assembled core column node aluminum alloy space grid structure, comprising: Figure 1 and Figure 2 As shown, a three-layer assembled core column node aluminum alloy spatial grid structure is composed of three chord layers 1 and two web layers 2, that is, the number of chord layers 1 is N=3, the number of web layers 2 is N-1=2, including the chord layer 1, the web layer 2, and the assembled core column node 3.

[0042] The plane projection diagram of the chord layer 1 is as follows Figure 3 As shown, the chord layer 1 includes chords 4 and assembled core column nodes 3, the chords 4 are I-shaped aluminum alloy rods, and in the chord layer 1, the intersection rule of the chords 4 is a Kvit grid form, and the number of chords 4 converging at each assembled core column node 3 is m=6.

[0043] like Figure 4 and Figure 5 As shown, the assembled core column node 3 includes a core column 5 extending into the chord layer, an upper ring plate 6, a lower ring plate 7, an angle aluminum fastener 8, a connecting plate 9 and a fastener 10. Figure 6 As shown, the core column 5 is composed of an inner cross rib 11, an annular rib 12 and a branch 13; Figure 7 As shown, the inner ring diameter of the upper ring plate 6 and the lower ring plate 7 is the outer diameter of the ring rib 12 of the core column 5 plus 10 mm; in the chord layer 1, the upper flange 14 and the lower flange 15 at both ends of each chord 4 are connected to the upper ring plate 6 and the lower ring plate 7 respectively through fasteners 10; the upper ring plate 6 and the lower ring plate 7 are then connected to the limbs 13 of the core column 5 respectively through angle aluminum fasteners 8 with fasteners 10; the web 16 at both ends of each chord 4 is connected to the core column 5 through fasteners 10 with two connecting plates 9, forming a three-layer spherical assembled core column node aluminum alloy space grid structure with a plane projection of a Kwitt-type grid.

[0044] The number of the limbs 13 of the core column 5 and the angle of each limb 13 are the same as the angle of the intersection chord 4 at each node; Figure 2 and Figure 6 As shown, the core column 5 runs through each chord layer 1, and bolt holes 17 are preset at corresponding positions of each chord layer 1. The core column 5 portion between adjacent chord layers 1 is the vertical web member 18 of the aluminum alloy space grid structure, and all the vertical web members 18 constitute the web member layer 3.

[0045] Embodiment 2: A fully assembled core column node aluminum alloy space grid structure, comprising: Figure 8 and Fig. 9 , Fig.10 As shown, a double-layer assembled core column node aluminum alloy space grid structure is composed of two chord layers 1 and one web layer 2, that is, the number of chord layers 1 is N = 2, and the number of web layers 2 is N-1 = 1. Fig.11 As shown, the intersection rule of the chord rods 4 is a square grid form, and the number of chord rods 4 that converge at each assembled core column node 3 is m=4. Fig.12 As shown, the core column 5 has four limbs, and the angles thereof are the same as those of the chord 4. The composition method of the remaining parts of this embodiment is the same as that of the embodiment 1, and finally a double-layer cylindrical assembled core column node aluminum alloy space grid structure is formed, whose plane projection is a linked square grid.

[0046] Embodiment 3: A fully assembled core column node aluminum alloy space grid structure, comprising: Fig.13 As shown, there is only one chord layer 1, that is, the number of chord layers 1 N = 1, and there is no web layer. Fig.14 As shown, the intersection rule of the chord rods 4 is a rib ring grid form, and the number of chord rods 4 that converge at each assembled core column node 3 is m=4. Fig.12 As shown, the core column 5 has 4 limbs, and the limb angle is the same as the chord 4. The height of the core column 5 only needs to meet the installation requirements of the chord 4. The components and composition method of the assembled core column node 3 of this embodiment are basically the same as those of the embodiment 1, and finally a single-layer spherical assembled core column node aluminum alloy space grid structure with a plane projection of a rib ring grid is formed.

[0047] In summary, the fully assembled core column node aluminum alloy space grid structure has the characteristics of simple structure, large bearing capacity, good stability, clear force transmission and full assembly, which solves the problem that the aluminum alloy space grid cannot be applied to large span and large load conditions.

[0048] The construction method of the assembled core column node aluminum alloy space grid structure is determined based on the stress condition and structural characteristics of the structure, taking into account factors such as economy, progress and construction site conditions. Common installation methods include high-altitude bulk method, strip or block installation method, overall hoisting method, overall lifting method and overall jacking method.

[0049] The beneficial effects after the implementation of the present invention are:

[0050] Compared with the existing aluminum alloy space grid structure using Temcor nodes, bolt ball nodes or hub nodes, the assembled core column node in the present invention has a simple structure, direct and efficient force transmission, and flexible form. The core column can be extended vertically according to the needs of the overall structure to form a double-layer, triple-layer or other multi-layer aluminum alloy space grid structure, which has strong adaptability and a wide range of applications.

[0051] The fabricated core column node aluminum alloy space grid structure of the present invention has excellent structural performance under the external load several times its own weight, and can meet the engineering requirements of large span and large load. Fig.15As shown in the figure, under the load condition of 5 times the deadweight of the structure, the vertical deformation of the 100m span double-layer m=4 assembled core column node aluminum alloy space grid structure is only 92mm, which is about 1 / 1000 of the structure span, far less than the requirements of the current industry standard "Technical Code for Space Grid Structures"; Figure 16 to Figure 18 As shown in , the first and second order vibration modes of the structure are translational, and the third order vibration mode is torsion, which has excellent dynamic performance; Fig.19 As shown, the nonlinear stability coefficient of the structure is 7.3, which is much better than the requirements of the current industry standard "Technical Code for Spatial Grid Structures", indicating that the assembled core column node aluminum alloy spatial grid structure of the present invention has excellent stability performance and can be applied to spatial structure buildings with different spans of large, medium and small and under different load conditions.

[0052] The assembled core column node of the present invention has high rigidity and high bearing capacity, and can simultaneously meet the requirements of different forms of internal forces such as bending moment, shear force and axial force. Figure 20 to Figure 22 As shown in the figure, compared with the existing node forms such as Temcor nodes and bolt ball nodes commonly used in current projects, the bearing capacity and node bending stiffness of the prefabricated core column nodes have been significantly improved.

[0053] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A fully assembled core column node aluminum alloy space grid structure, characterized by: The invention comprises N chord layers (1) and N-1 web layers (2), wherein the number of chord layers (1) is N=1, 2, 3, 4; each chord (4) in the chord layer (1) is an I-shaped aluminum alloy rod, referred to as an I-shaped aluminum; each I-shaped aluminum rod intersects at a connection node according to a certain rule, that is, every m (m=4, 5, 6, 7, 8) rods converge at a connection node to form a chord layer (1); each connection node of different chord layers (1) is connected by a vertical core column (5); the part of the vertical core column (5) extending into the chord layer (1) and connected to each intersecting chord (4) is called an assembled core column node (3); the part of the vertical core column (5) located between each chord layer (1) is called The web members (16) are web members, and all the web members (16) together form a web member layer (2); the assembled core column node (3) comprises a core column (5), an upper ring plate (6), a lower ring plate (7), an angle aluminum fastener (8), a connecting plate (9) and a fastener (10); the upper flange (14) and the lower flange (15) of each I-shaped aluminum member of the chord layer (1) are connected to the upper ring plate (6) and the lower ring plate (7) respectively through the fastener (10); the web plate (16) of the I-shaped aluminum member is connected to the corresponding core column (5) by two connecting plates (9) through the fastener (10); the upper ring plate (6) and the lower ring plate (7) are connected to the core column (5) by the angle aluminum fastener (8).

2. The fully assembled core column node aluminum alloy space grid structure according to claim 1 is characterized in that: The space grid structure can be designed into a single-layer, double-layer, triple-layer or quadruple-layer structure according to the needs; that is, the number of chord rod layers (1) is N=1, 2, 3, 4.

3. The fully assembled core column node aluminum alloy space grid structure according to claim 2 is characterized in that: The maximum value of the number N of the chord layers (1) is not limited to 4, or is greater than 4.

4. The fully assembled core column node aluminum alloy space grid structure according to claim 1 is characterized in that: The assembled core-column node aluminum alloy space grid structure is in the form of a sphere, a cylinder, a parabola or a free-form surface.

5. The fully assembled core column node aluminum alloy space grid structure according to claim 1 is characterized in that: The composition rules of each I-shaped aluminum rod are selected according to the number of rods m that meet at the point in the following manner:

6. The fully assembled core column node aluminum alloy space grid structure according to claim 1 is characterized in that: The core column 5 is composed of an inner cross rib (11), a ring rib (12) and limbs (13); the core column (5) includes m limbs (13), that is, the number of limbs (13) is consistent with the number of rods at which the chord layer (1) converges at one point; the length of the core column (5) can be stretched and extended arbitrarily according to the number of chord layers (1) of the aluminum alloy spatial grid structure, so as to meet the requirements of spatial grid structures with different numbers of layers.

7. The fully assembled core column node aluminum alloy space grid structure according to claim 1 is characterized in that: The fastener (10) is made of common bolts, high-strength bolts or ring-groove rivets; the material of the fastener (10) is made of steel, stainless steel, aluminum alloy or titanium alloy.

Images