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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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Application and development of spaceframe engineering

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 With the rapid development of Internet technology, space frame engineering, as one of the forms of steel structure engineering, is an important infrastructure that is widely used in various fields. The purpose of this paper is to have an in-depth discussion on the space frame engineering from the aspects of development history, application fields and future trends.

I. Development history

space frame project refers to the hidden or semi-hidden structure on the façade of the building for the framing, after a unique process, design and decorative engineering production. Its origin can be traced back to the ancient Chinese wooden structure technology, but the real meaning of the space frame engineering development began in the 1980s. A large number of high-rise buildings appeared in the city, which made the space frame engineering widely used. Modern space frame engineering has also made a series of innovations and improvements in design, production and installation, making it an indispensable part of the construction field.

Second, application field

Architectural decoration: Net framing engineering can produce rich and diverse decorative effects, such as lattice, patterns, lines, etc., according to the style and demand of the building. It can not only improve the aesthetics of the building, but also play the role of shading and sheltering from wind and rain.

Advertisement signs: With the acceleration of urbanization, various commercial advertisement signs come out one after another. space frame project can provide solid support for advertising signs without taking up too much building space, which greatly enriches the landscape of the city.

Greening project: In the city, there is often a lack of greening around some high-rise buildings. The application of space frame project can plant suitable green plants on the building facade, making the city more ecological and environmental protection.

Transportation facilities: In the transformation of transportation facilities such as highways and bridges, mesh frame engineering can be used as anti-corrosion and anti-cracking measures to prolong the service life of transportation facilities.

City Lighting: At night, the space frame project can also be used as an important part of city lighting decoration. Through scientific lighting arrangement and control, it creates a romantic and unique city night scene.



Third, the future trend

With the continuous progress of science and technology, the space frame project will also get more innovation and development in material, process and design. The future space frame project will be lighter, more environmentally friendly and more intelligent at the same time. For example, new materials will be able to provide stronger wind and earthquake resistance, while at the same time lighter in weight, reducing the load on the building. Intelligent control systems can realize automatic adjustment of light, temperature and humidity to enhance the user experience.

In addition, mesh frame engineering plays an important role in coping with natural disasters and environmental changes. For example, in buildings in earthquake zones, the use of elastic mesh frame structure can effectively slow down the seismic impact and reduce disaster losses.

In conclusion, as an important architectural decoration and infrastructure, space frame engineering not only plays an irreplaceable role in beautifying the urban environment and improving the usability of buildings, but also plays an important role in greening, advertising and marking, and lighting. With the progress of technology and the increasing social demand, the development of space frame engineering will certainly move towards a more intelligent, environmentally friendly and diversified direction.

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

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