The Knowledge Points of "Structural Forms" in Steel Structures
1. Classification and characteristics of common structural systems?
Common structural systems include brick concrete, frames, shear walls, frame shear walls, tubes, trusses, grid structures, arches, suspension cables, thin-walled spaces, etc. Steel structures mainly include portal steel frames, frames, trusses, and grid structures. Different structural systems have different advantages and disadvantages, and their stress forms are also different. In real architecture, there are often two or more combined structural forms.
2. Characteristics and application examples of common steel structure forms?
Portal rigid frames are widely used in industrial and civil buildings such as industrial, commercial, and cultural entertainment public facilities due to their simple force bearing, clear transmission path, and fast construction speed.
The advantage of steel truss is that it can use smaller section members to form larger section components. It is commonly used in industrial and civil buildings such as roofs, bridges, television towers, mast towers, offshore oil production platforms, tower corridors, and other buildings with larger spans or heights.
Steel grid structure is a high order statically indeterminate spatial structure composed of many members according to certain rules, with small spatial force, light weight, high stiffness, and good seismic resistance. It can be used as a roof for buildings such as sports halls, exhibition halls, waiting halls, awnings, aircraft hangars, etc.
3. Composition of the portal frame factory building structural system?
The steel structure plant is divided into light steel plant and heavy steel plant. The plant structure system is mainly composed of steel columns, wind resistant columns, parapet columns, roof steel beams, crane beams, inter column supports, roof truss horizontal supports, wall purlins, roof purlins, skylight frames, tie bars, etc. The main force bearing body of the portal frame is the portal frame, which can be single span, multi span, or multi-layer, with an economic span of about 24-30 meters.
4. What are the common nodes in a portal frame factory building?
Common nodes of portal steel frames include column foot nodes, beam column nodes, roof truss beam nodes, inter column support nodes, tie rod connection nodes, gutter bracket nodes, etc.
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