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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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Characteristics of steel structure space frame

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 The steel space frame has the following characteristics:


 

space frame

1. Uniform load transfer of space structure: space frame structure can distribute the load evenly to all the members, so that the whole grid is uniformly stressed.

2. Quick and convenient construction: the space frame structure can be produced by prefabrication or modularization, which greatly shortens the construction period and can be repeatedly disassembled and reused.

3. High degree and anti-seismic performance: due to the characteristics of steel structure itself, the space frame structure has high load-bearing capacity and anti-seismic performance, and can adapt to all kinds of harsh environment and climate conditions.

4. Large span and flexibility: the space frame structure can be adapted to a variety of large-span buildings, and can be adjusted to meet different needs by adjusting the form and size of the structure.

5. Recyclable materials: the steel used in steel structure space frame can be recycled and reused, which meets the requirements of environmental protection and sustainable development.

In conclusion, steel space frame is a kind of building structure form with the advantages of structural stability, quick construction, good height degree and seismic performance, large span and flexibility as well as material recycling and reuse, etc., which has a wide range of applications in the field of construction.

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Suspension structures

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 A suspension structure is a structural form that carries roof loads through a series of high-strength steel cables. Its main load-bearing member is the cables, which are usually steel cables made of high-strength steel wires. The roof of the suspension structure is generally light and thin, and its shape can be very flexible, able to realize the large span across. For example, in the roofs of some large conference centers or exhibition halls, the suspension structure can create unique shapes such as double-curved paraboloid or single-curved paraboloid, which make the building have a strong artistic influence. Suspension structures require a stable support structure to anchor the steel cables, usually using reinforced concrete columns or steel columns as support. And in order to ensure the stability of the structure, it is also necessary to set a certain amount of prestressing, so that the steel cables are in a tensioned state before they are subjected to loads. Scope of applicatio...
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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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