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What is a shear key in steel structures?

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 In steel structure engineering , the column base connection serves as the pivotal interface linking the superstructure to the concrete foundation below. It must safely and reliably transmit various loads from the upper structure: vertical pressure , uplift forces , bending moments , and horizontal shear forces . When horizontal shear forces become substantial, the friction alone between the column base plate and the concrete foundation surface proves insufficient to resist them. At this juncture, a critical small component becomes indispensable—the shear key . Shear keys, as the name suggests, are structural steel connection components specifically designed to resist and transmit horizontal shear forces. Essentially, they are short steel members. Installation location: Typically welded or anchored to the base plate of a steel column (or other load-bearing components such as equipment supports ), with its lower end embedded in the concrete foundation or concrete structure cast ...

Nodal treatment of roof waterproof construction for large-span buildings

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  1, Deformation joints: large-span building roof due to temperature changes, structural deformation and other factors will produce deformation joints. The waterproof construction at the deformation joints should be able to adapt to the deformation of the roof. General use of flexible waterproof construction, such as in the deformation joints filled with polystyrene foam and other thermal insulation materials, and then paste the waterproofing roll-roofing material on both sides, the coil should be used in the empty pavement method or point bonding method, leaving enough space for expansion and contraction, and then in the coil surface to install a metal or plastic cover, to play a protective and decorative role. 2, Light windows and roof junction processing: in some large-span building roof will be set on the light windows, this part is the key node of waterproofing. First of all, we must ensure that the light window and roof structure is firmly connected, and then at the juncti...

Structural Characteristics of Steel Tube Joist

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  As a structural engineer, I would look at the following aspects of analysing a steel tube joist : I. Structural characteristics: 1. Simple structure: Pipe truss structure is connected by several sets of pipe rods and nodes, which does not need a large number of parts, so the structure is very simple. This design not only makes installation and dismantling faster and more convenient, but also reduces the manufacturing cost. 2. Light weight: Pipe trusses are made of lightweight materials and the overall weight is light. This helps to reduce the load of the building itself and improve the load-bearing capacity of the building. 3. High Strength: The tube truss structure is made of high strength materials such as steel pipe, so the whole structure has high load bearing capacity and wind resistance. It can withstand larger loads and external impacts to ensure the stability and safety of the building. 4. Good anti-seismic performance: Due to the stability and flexibility of tube truss ...