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As a modern high-end building structure, the light steel structure system is favored by designers and builders due to its rich and varied structural modeling effects, and is widely used in multi-storey buildings.
The space frame structure of the emergency dry coal shed in the coal pile area of the power plant is irregular pentagon in plane shape, with a length of 121.958m and a maximum span of 99.949m. The roof of the coal pile area is a double-layer flat space frame, which is supported by reinforced concrete columns around the perimeter. The space frame structure is in the form of quadrilateral cone cylindrical space frame shell structure, and the joints are connected by bolt balls.
Space frame structure because of its novel structure, reasonable force, light weight, small amount of steel, a large number of steel structures have emerged from the late 1980s, increased by about 80 to 1 million m2 every year. Widely used in large sports venues, exhibition centers, theaters, shopping malls, terminal buildings, waiting halls, factory workshops, warehouses, TV towers, etc.
The roof of Chaoshan Airport terminal building is a spatial multi-curved welded spherical space frame structure in the form of positively placed quadrangular cones, with a length of about 315m along the direction of the central axis and a width of about 280m perpendicular to the direction of the central axis, of which there is an outdoor cantilevered roof of about 20m at the entrance of the south-eastern end of the terminal building.
Stainless steel is one of the strongest of the metal materials used in construction. Because of its excellent corrosion resistance, stainless steel allows structural components to permanently maintain the integrity of the engineering design.
The main loads of space frame steel structure are divided into three kinds, which are action load, permanent load and variable load. Generally speaking, the loads include the self-weight of the space shell structure, the self-weight of the roof maintenance structure, the load of the suspended equipment pipe and the load of the cat walk.
The selection of space frame frame should be combined with the plan shape of the building, requirements, load and span size, support situation and economic factors such as comprehensive consideration.
The selection of space frame frame should be combined with the plan shape of the building, requirements, load and span size, support situation and economic factors such as comprehensive consideration. Usually, we divide it according to the span size as follows: above 60m span is large span; 30m to 60m is medium span; below 30m is small span.
The current use of: welding is the most common application; high-strength bolt connection in recent years, the rapid development of the use of more and more rivet connection has been basically replaced by welding and high-strength bolt connection, rarely used.
Welding should follow a certain sequence, usually welding the middle node first and then expanding to the nodes at both ends of the truss. This helps to avoid dimensional deviations between the nodes of the joist caused by the accumulation of weld shrinkage towards one end.
Carbon: the higher the carbon content, the higher the hardness of the steel, but its plasticity and toughness is worse.
Using 0.8-1.35mm thick galvanized steel plate to realize the roof structure of plate and frame, spanning 6-36m, without purlin and roof frame, light weight, material saving, although using galvanized steel, the total cost is still lower than the traditional structure.
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2024-07-01
