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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 ...

Early development of steel structures in China

 

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Structural steelwork is a structure made mainly of steel and is one of the main types of building structure. Steel structures are one of the more common forms of structures used in modern construction work. China was the first country to use iron to make load-bearing structures, as far back as the time of Qin Shi Huang (246-219 BC), when iron was used to make simple load-bearing structures.


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