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目前显示的是标签为“large-span buildings”的博文

Issues to be noted in the grid welding process

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Spatial structures are widely used in large-span buildings due to their advantages such as reasonable spatial force, light weight and high rigidity. 1. Pre-welding preparation should be meticulous (1) Material quality control The quality of materials such as steel, welding rods, welding wires and flux is the basis. The quality certification documents must be strictly reviewed to ensure that their varieties, specifications and performance are consistent with the design and relevant standards. For example, the Q235 and Q355 steels commonly used in grids must ensure that their mechanical properties such as yield strength and tensile strength meet the standards. The type of welding rod must match the parent material. For example, when welding Q235 steel, E43 series welding rods can be used. At the same time, the material should be inspected for appearance. There should be no defects such as cracks and interlayers on the surface of the steel, and the welding rods and welding wires should n...

Typical Defects and Damage in Long-Span Bolted Spherical Node Steel Space Structures

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 1. Bolted Spherical Node Defects Threaded Hole Machining Accuracy Issues The threaded holes in bolted spherical nodes are critical components where machining precision is paramount. In actual production, issues such as positional deviations and uneven pitch frequently occur. For instance, excessive positional deviation can result in loose connections between bolts and spheres, preventing effective load transfer and degrading structural performance. Uneven pitch impedes bolt insertion and tightening, leading to insufficient preload. In large-span space frames, this may cause node loosening and compromise overall structural stability. Bolt Sphere-Member Connection Issues Bolt spheres typically connect to members via bolted joints. In practice, bolt length, diameter, and tightening torque all affect connection quality. Insufficient bolt length compromises the connection's integrity, increasing the risk of disengagement under external forces. Excessive or insufficient tightening torq...

Steel structure truss roof design for shed

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  When designing the   truss design for shed , there are several important considerations to keep in mind. First, the truss should be designed to provide adequate support for the roofing materials that will be used. Second, the truss should be designed to meet local building codes and regulations. Finally, the truss should be designed to provide the necessary clearance for any interior equipment or furniture that will be placed in the shed. When selecting the appropriate truss style for a shed, it is important to consider the overall size and shape of the shed. Generally, a shed roof should be constructed using either a gable or hip truss design. Gable trusses are often used for smaller, rectangular sheds, while hip trusses are better suited for larger, more complex-shaped sheds. It is also important to consider any additional structural requirements that may be necessary. In some cases, additional support beams or posts may be needed to provide extra stability to the shed roo...

The overall lifting technology of the super large space frame of the double-machine hangar

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The double-seat hangar of Eastern Airlines has a horizontal span of 15m, a longitudinal depth of 9m, and a total area of  ​​ 14728m2, which is equivalent to two standard football fields and can perform repairs and maintenance of two large passenger aircrafts at the same time. There are 32 reinforced concrete upper columns in the hangar, which are distributed in a concave shape. The column on the A-axis is a rectangular column with a section of 4mX2m, a wall thickness of .4m, and a height of 25m, and the others are combined columns with four limbs with a height of 29m. The limbs of the two combined columns are connected by concrete beams with a height of 7cm and a width of 25cm. The center distance between the connecting beams is generally 3m. Since there are no columns in the 15m span of the gate, the load on the four columns at the A and B axis amounts to two-thirds of the total weight of the  space frame .  The hangar roof steel structure  space frame  is mad...
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 Structure of the hangar The plane layout and height requirements of the aircraft hangar are quite special, which directly affects the structure of the hangar . Due to the large span of the hangar, the structural self-weight (mainly the roof system) accounts for a large proportion of the total load. If the structural self-weight can be reduced, significant economic effects can be obtained. The steel structure has the advantages of high strength, light weight, small component section, weldability, and relatively simple manufacturing process. Therefore, it is common to use steel structure as a roof load-bearing system in large-span structures. The space frame structure system has good strength and light weight, which can solve some problems that cannot be solved by the plane structure system. Space structures such as shell structure, grid structure, and suspension cable structure have been widely used as roof systems for large-span buildings. If you have a similar project to be buil...