👉 Project location: Nigerian coast 👉 Project type: Mine warehouse (span 100 metres, length 125 metres) 1. Structural Design Span and Length: The mine warehouse has a span of 100 metres and a length of 125 metres, employing a large-span steel structure design to ensure structural stability and load-bearing capacity. It is recommended to use a steel truss structure or space frame structure to meet the large-span requirements and optimise material usage. The structural design must consider wind loads, seismic loads, and dynamic loads during the operation of the bucket wheel excavator. Foundation Design: Since the project is located by the sea, the foundation may be relatively soft. It is recommended to use deep foundation design (such as pile foundations) to ensure structural stability. Foundation construction must consider the impact of groundwater levels and saline-alkali environments, and foundation reinforcement should be carried out when necessa...
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Application and Installation of Bolted Ball Grids in the Design of Large-Span Roof Structures
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Large-span roofs are a common structural form in modern buildings and are widely used in large-scale public buildings such as stadiums, exhibition centres and airport terminals. In these projects, the structural design should not only meet the functional requirements, but also take into account the economy, aesthetics and construction feasibility. As an efficient space grid structure, bolted ball space frame is widely used in large-span roofing projects due to its advantages of light dead weight, strong bearing capacity and convenient construction.
I. Structural design characteristics of bolted ball grid frame
Bolted ball mesh rack is a kind of three-dimensional space structure composed of ball nodes and rods, and its core feature is to connect the rods and ball nodes through bolts to form an overall force system. Compared with traditional steel joist, bolted ball grid has the following structural design advantages:
Light deadweight: the rods of bolted ball space structure usually adopt steel pipe or round steel, with smaller cross-section size, so the overall structural deadweight is lighter, which reduces the bearing pressure of foundation and substructure. Strong load-bearing capacity: through reasonable node design and rod arrangement, the bolted ball space structure can effectively disperse the load, and has high load-bearing capacity and anti-seismic performance.
Convenient construction: the rods and nodes of bolted ball frame are prefabricated components, which only need to be assembled and connected at the construction site, reducing the welding workload and shortening the construction period.
Strong adaptability: Bolted ball space structure is suitable for roof design of various spans and shapes, and can meet different functional requirements of buildings.
In the design of large-span roofs, the bolted ball space structure is usually used in conjunction with purlins, roof panels and other components to form a complete roofing system. Load distribution, node stiffness, rod stability and other factors need to be considered comprehensively to ensure the safety and economy of the structure.
II.Installation method of bolted ball space structure
The installation of bolted ball space structure is the key link of the whole project, and its construction quality directly affects the safety and service life of the structure. The following are the main installation methods of bolted ball net frame:
Prefabrication and transport The rods and nodes of bolted ball net frame are prefabricated components, which need to be processed and assembled in the factory. After assembly, the components are transported to the construction site by special means of transport.
Foundation preparation Before installation, the foundation should be checked and accepted to ensure that the plane degree and elevation of the foundation meet the design requirements. At the same time, temporary support frames should be set up to provide a stable working platform for the installation of the net frame.
Assembly and lifting The installation of bolted ball net frame usually adopts the method of assembling in pieces or lifting as a whole.
Block assembly method: the net frame is divided into several blocks, which are assembled on the ground, then lifted to the designed position by hoisting equipment, and then connected as a whole.
Overall lifting method: After assembling the whole net frame on the ground, the whole net frame will be lifted to the designed height by hydraulic lifting equipment.
Node connection and adjustment After the net frame is lifted to the design position, the nodes need to be bolted together and the length of the rods and the position of the nodes need to be adjusted to ensure the overall geometric accuracy of the net frame.
The plane position, elevation and node spacing of the net frame are detected by measuring instruments to ensure that they meet the design requirements. For the parts that are out of the error range, they need to be corrected by adjusting the length of the bars or applying pre-stress.
Inspection and acceptance After the installation is completed, the net frame needs to be tested comprehensively, including node connection quality, rod straightness, overall geometric accuracy. After passing the test, the roof panel can be installed.
III. the future development trend of bolted ball space structure
With the continuous progress of construction technology, the application of bolted ball space structure in large-span roofing has a broader prospect. In the future, its development trend is mainly reflected in the following aspects:
Intelligent design
Through BIM technology, finite element analysis and other means, the intelligent design and optimisation of bolted ball space structure can be achieved to improve the economy and safety of the structure.
Modular construction
Adopt modular prefabrication and assembly technology to further improve the construction efficiency and quality of bolted ball grid frame.
Green Environment
In the selection of materials and construction process, focus on green environmental protection, adopt recyclable materials and energy-saving construction technology to reduce the impact on the environment.
As an efficient spatial grid structure, bolted ball mesh racking shows unique advantages in large-span roofing projects. Its flexible structural design, convenient construction and strong bearing capacity can meet the dual demands of modern buildings for function and aesthetics. With the continuous progress of technology, the application range of bolted ball space structure will be further expanded, injecting new vitality for the development of the construction industry.
What Are The Architectural Features Of The Space Frame Fabrication? Buildings processed by space frame are a good form of construction, because the materials used are mainly metal, which have better toughness than other materials. This will not only help enhance the load-bearing capacity of the building itself, but also shorten the construction period. To reduce the difficulty of construction, let's talk about the characteristics of space frame production buildings： space frame 1. The components of space frame has good mechanical properties, and its stiffness and overall stability are better than those of general planar structures. 2. The space frame structure has certain regularity and is convenient for construction. There are a large number of same form components and nodes in the space frame structure, which brings convenience to factory production and structural installation, ensu res the quality of the project, acceler...
The development status of the space frame structure space frame structure has been developed greatly in the last 30 years, and has been widely used inside and outside. space frame structure plan arrangement is flexible, space shape is beautiful, convenient for building shape processing and decoration, decoration, can adapt to different span, different plane shape, different support conditions, different functional needs of the building. Especially in the roof structure of large and medium span, the space frame structure shows its superiority and is used in large number of large sports buildings, public buildings, industrial buildings, and also widely used in the roof of some small buildings, such as gas stations, toll stations, large canopies. In recent years, with the wide application of electronic computers and the development of computing technology, the design efficiency of the space frame structure has been greatly improved. The construction and i...
truss roof Most of the rods in joist structures are welded at the nodes. Before welding, the webs and chords need to be cut in advance according to the shape of the weld seam of each member to be welded, which requires cutting of the web ends and slotting of the chords. Since the joist structure is intersected by coherent line between the rods and rods, the shape of rod end section is complicated, so in the actual cutting process, two methods of mechanical automatic cutting process and manual cutting process are generally used.
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