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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 ...
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Comparison Of Welded And Bolted Ball Netting Structures

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 Comparison of welded and bolted ball netting structures

space frame


Analysis in terms of quality assurance.

1, welded ball structure using hollow ball (material Q235 ordinary steel) and welded pipe on the site of the welding, by the temperature and wind speed, under the influence of the welding machine equipment and basic artificial manual, resulting in the material, positioning, welding process, error, low precision. The steel has stress deformation before and after welding, which is a safety hazard. The angle control between the various bars is not accurate after use, which can easily distort the bars and destroy the balance of force transmission. It is not possible to adapt to the requirements of shaped curves and oversized spans, and the quality is difficult to guarantee, so there are great limitations.

2、Bolt ball structure is made of solid ball (material 45# high strength steel) and high strength bolt (material 40Cr), which are closely jointed. The angle between the screw holes on the bolt ball is precise, and the bar has built-in 10.9S high-strength bolts, which are tensile and compressive, and the force transmission is stable and balanced.

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What is a coal bunker?

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Suspension structures

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What is the difference between a single-layer reticulated shell and a double-layerreticulated shell?

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  The differences between single-layer reticulated shells and double-layer reticulated shells are as follows: Structural Configuration   Single-layer reticulated shell: Composed of a single layer of members, with the members directly connected to form a grid structure . The node configuration is relatively simple, typically employing rigid connections that allow the members to bear not only axial forces but also bending moments and shear forces.   Double-layer reticulated shell: Consists of upper and lower parallel layers of members connected by web members, forming a truss-like structural system. The nodes are generally hinged, and the members primarily bear axial forces. Its configuration is relatively complex, requiring more members and nodes to ensure structural stability and load-bearing capacity. Structure Single-layer mesh shell: composed of one layer of rods, the rods are directly connected to form a mesh structure, the node structure is relatively simple, usually...
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