CN213233784U

CN213233784U - Reinforced aluminum alloy single-layer space grid structure

Info

Publication number: CN213233784U
Application number: CN202021196768.8U
Authority: CN
Inventors: 刘红波; 刘晓娜; 陈志华; 贾莉; 周婷
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-05-18
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a reinforced aluminum alloy single-layer space grid structure, which is formed by connecting H-shaped section-like rods, wherein the H-shaped section-like rods are formed by splicing two groove-shaped rods back to back; the rod piece with the similar H-shaped section is connected with the upper disc cover plate and the lower disc cover plate by adopting a ribbed round tube at a node, the ribbed round tube is provided with a tube body, rib plates are arranged on the outer side of the tube body, the number of the rib plates is the same as that of the rod piece with the similar H-shaped section at the node, the rib plates are uniformly distributed along the circumferential direction of the tube body and extend along the radial direction, and the thickness of the rib plates is equal to; the rib plates are inserted into the abutted seams at the end parts of the rod pieces with the similar H-shaped cross sections in a one-to-one corresponding mode, the rib plates and the abutted seams are connected through fasteners II, and the two disc cover plates are respectively covered at the top and the bottom of the node and are connected with the rod pieces with the similar H-shaped cross sections through fasteners III; the plate type node adopted by the utility model has good web plate stress performance and high shear strength; and the structure has excellent bearing performance.

Description

Reinforced aluminum alloy single-layer space grid structure

Technical Field

The utility model relates to an aluminum alloy space grid structure, especially a strenghthened type aluminum alloy individual layer space grid structure.

Background

The aluminum alloy is a building material with light weight, high strength, good corrosion resistance and easy processing, and is widely used in large-span space structures. In 1940, Germany builds the earliest aluminum alloy grid structure in the world, and adopts a Mero system; the "exploration" dome built in uk in 1951 was the first aluminum alloy space reticulated shell structure in the world; since the 40 s of the 20 th century, aluminum alloys have been widely used in foreign building structures, especially industrial buildings; in the 50 s of the 20 th century, aluminum alloy structures began to enter China, and a representative building is a Tianjin gym roof which is in a connected square cylindrical reticulated shell structure with a pull rod. Before the 90 s, the method is not popularized all the time under the restriction of the economic conditions, the openness degree and other conditions of China. The typical aluminum alloy space grid structure engineering in China is built after 90 years, the research and application of the aluminum alloy space grid structure in China is rapidly developed, and a large number of special aluminum alloy space grid structures appear, such as Tianjin Pingjin battle memorial hall, Beijing aviation test institute zero-magnetism laboratory, Chinese modern five-event center swimming fencing hall, niu sho Buddha top palace, Shanghai Rafei corridor and the like.

The node is used as a force transmission center for connecting a plurality of components in the structure, the stress condition is very complex, and the mechanical property can seriously affect the safety of the structure. However, the welding performance of the aluminum alloy material is poor, the mechanical property of the material in the welding heat affected zone can be rapidly reduced, the oxide film on the surface of the aluminum alloy is damaged, and the material close to the welding heat affected zone can be softened at high temperature. Therefore, in the space grid structure, the aluminum alloy nodes are mostly connected mechanically, and mainly comprise four node forms of bolt-ball nodes, plate-type nodes, cast aluminum nodes and hub-type nodes. The bolt ball system adopts a round pipe and a bolt ball node for connection, but is limited by processing, the size of the bolt ball node and a corresponding rod piece is small, and the prior bolt ball aluminum alloy space grid structure is mostly used in projects with span of less than 30 meters. The hub node is weak in rigidity and has a certain limitation. The cast aluminum node has poor ductility and has great difficulty in practical popularization and use.

The plate type node is a mature aluminum alloy single-layer grid structure node system at present, is a patent researched by the American Temcor company, mainly comprises a node plate, a rod piece (H-shaped or box-shaped) and a bolt, the node plate is connected with a flange of the rod piece through the bolt, webs among different rod pieces are discontinuous, and the shearing resistance is poor. In part of researches, it is found that before the structure reaches the limit bearing capacity, buckling of the rod web in the node area may occur first, the node fails, and the bearing capacity of the structure is greatly reduced. Therefore, in order to optimize the stress performance of the aluminum alloy plate type node web, improve the shear strength of the node, and further enhance the bearing performance of the spatial grid structure, the structure of the existing plate type node still needs to be improved and optimally designed in view of the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a reinforced aluminum alloy single-layer space grid structure for solving the technical problems in the prior art, and the plate type nodes adopted by the structure have good web plate stress performance and high shear strength; and the structure has excellent bearing performance.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a reinforced aluminum alloy single-layer space grid structure is formed by connecting H-shaped section-like rod pieces, wherein each H-shaped section-like rod piece is formed by splicing two groove-shaped rod pieces back to back, the two double-spliced groove-shaped rod pieces are connected by a fastening piece I, a circular ring base plate is sleeved on the fastening piece I, and the circular ring base plate is clamped between the two double-spliced groove-shaped rod pieces; the rod pieces with the similar H-shaped cross sections are connected with the upper disc cover plate and the lower disc cover plate through ribbed round tubes at nodes, the ribbed round tubes are provided with tube bodies, rib plates are arranged on the outer sides of the tube bodies, the number of the rib plates is the same as that of the rod pieces with the similar H-shaped cross sections at the nodes, the rib plates are uniformly distributed along the circumferential direction of the tube bodies and extend along the radial direction, and the thickness of the rib plates is equal to that of the annular backing plates; the rib plates are inserted into the abutted seams at the end parts of the similar H-shaped section rod pieces in a one-to-one corresponding mode, the rib plates and the abutted seams are connected through fasteners II, and the two disc cover plates are respectively covered at the top and the bottom of the node and are connected with the similar H-shaped section rod pieces through fasteners III; the groove-shaped rod piece, the ribbed round pipe and the disc cover plate are all made of aluminum alloy materials.

The fastener I, the fastener II and the fastener III are bolts, and the bolts are any one of ordinary bolts, Hooke bolts and high-strength bolts.

The utility model has the advantages and positive effects that: the H-shaped section-like rod piece is formed by the paired groove-shaped rod pieces, the H-shaped section-like rod pieces are connected by the fixing piece, the annular base plate is clamped between the two webs, the abutted seam is formed at the end part of each web, the ribbed plate of the ribbed round tube is convenient to insert, the webs and the ribbed plates are connected together by the fastening pieces, the stress performance of the web plates of the rod pieces is optimized, and the buckling damage of the webs of the rod pieces can be avoided. Meanwhile, the ribbed round tube, the upper disc cover plate and the lower disc cover plate connect the rod pieces into a whole, the shearing strength of the node is improved, the web plate of the groove-shaped rod piece is provided with a hole, the cross section of the groove-shaped rod piece is weakened to a certain degree, and the design concept of 'strong node and weak member' is met. The improvement of the overall performance of the node and the use of the rod piece with the similar H-shaped cross section enable the stress of the space grid structure to be more reasonable and the bearing performance to be more excellent. The performance of the aluminum alloy material can be fully exerted, the material utilization rate is improved, and the economic effect is better.

Drawings

FIG. 1 is a schematic view of the aluminum alloy space lattice structure of the present invention;

fig. 2 is a schematic structural diagram of a node in the present invention;

FIG. 3 is a schematic structural view of any paired trough-shaped member, upper and lower disk cover plates and ribbed round tubes;

FIG. 4 is a schematic structural view of any one of the paired trough-shaped members of the present invention, the disk cover plate, and the ribbed round tube;

FIG. 5 is a schematic structural view of any one of the paired grooved bars and ribbed round tubes of the present invention;

FIG. 6 is a schematic view of the inner structure of the paired trough-type members and the ribbed round tube of the present invention;

FIG. 7 is a schematic structural view of the paired trough-shaped members of the present invention;

fig. 8 is a schematic structural view of the ribbed round tube of the present invention.

In the figure: the steel pipe comprises 1-groove-shaped rod pieces, 2-nodes, 3-disc cover plates, 4-ribbed round pipes, 5-fasteners I, 6-fasteners II, 7-pipe bodies, 8-ribbed plates, 9-fasteners III and 10-circular ring base plates.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings as follows:

referring to fig. 1 to 8, a reinforced aluminum alloy single-layer space grid structure is formed by connecting H-like cross-section rod pieces, wherein the H-like cross-section rod pieces are formed by double splicing two groove-shaped rod pieces 1 back to back, the double-spliced two groove-shaped rod pieces 1 are connected by a fastening piece i 5, a circular ring base plate 10 is sleeved on the fastening piece i 5, and the circular ring base plate 10 is clamped between the double-spliced two groove-shaped rod pieces 1; the rod pieces with the similar H-shaped cross sections are connected with the upper disc cover plate 3 and the lower disc cover plate 3 at the nodes 2 by adopting ribbed round tubes 4, the ribbed round tubes 4 are provided with tube bodies 7, ribbed plates 8 are arranged on the outer sides of the tube bodies 7, the number of the ribbed plates 8 is the same as that of the rod pieces with the similar H-shaped cross sections at the nodes 2, the ribbed plates 8 are uniformly distributed along the circumferential direction of the tube bodies 7 and extend along the radial direction, and the thickness of the ribbed plates 8 is equal to that of the circular ring base plate 10; the rib plates 8 are inserted into the abutted seams at the end parts of the similar H-shaped section rod pieces in a one-to-one correspondence mode, the rib plates and the abutted seams are connected through fasteners II 6, and the two disc cover plates 3 are respectively covered at the top and the bottom of the node 2 and are connected with the similar H-shaped section rod pieces through fasteners III 9; the groove-shaped rod piece 1, the ribbed round tube 4 and the disc cover plate 3 are all made of aluminum alloy materials.

In this embodiment, the first fastening piece i 5, the second fastening piece ii 6 and the third fastening piece iii 9 are all bolts, and the bolts are any one of ordinary bolts, hooke bolts and high-strength bolts, so that the field assembly is facilitated. It should be ensured that the fastener does not electrochemically react with the aluminum alloy.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.

Claims

1. A reinforced aluminum alloy single-layer space grid structure is characterized by being formed by connecting H-like section rod pieces, wherein the H-like section rod pieces are formed by splicing two groove-shaped rod pieces back to back, the two double-spliced groove-shaped rod pieces are connected by a fastening piece I, a circular ring base plate is sleeved on the fastening piece I, and the circular ring base plate is clamped between the two double-spliced groove-shaped rod pieces;

the rod pieces with the similar H-shaped cross sections are connected with the upper disc cover plate and the lower disc cover plate through ribbed round tubes at nodes, the ribbed round tubes are provided with tube bodies, rib plates are arranged on the outer sides of the tube bodies, the number of the rib plates is the same as that of the rod pieces with the similar H-shaped cross sections at the nodes, the rib plates are uniformly distributed along the circumferential direction of the tube bodies and extend along the radial direction, and the thickness of the rib plates is equal to that of the annular backing plates; the rib plates are inserted into the abutted seams at the end parts of the similar H-shaped section rod pieces in a one-to-one corresponding mode, the rib plates and the abutted seams are connected through fasteners II, and the two disc cover plates are respectively covered at the top and the bottom of the node and are connected with the similar H-shaped section rod pieces through fasteners III;

the groove-shaped rod piece, the ribbed round pipe and the disc cover plate are all made of aluminum alloy materials.

2. The reinforced aluminum alloy single-layer space grid structure as recited in claim 1, wherein the first fastener, the second fastener and the third fastener are all bolts, and the bolts are any one of ordinary bolts, Hooke bolts and high-strength bolts.