Featured Articles

What is a shear key in steel structures?

-
图片
 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 ...
发表评论

Characteristics of space frame structure

-

 The load of the space structure is uniformly transferred. When bearing the load, the space frame structure can transfer the load to all the members, which bear the load, and distribute the load evenly to the support of the space structure. The construction is fast and convenient, and the space frame structure is an assemblable component, which greatly reduces the difficulty of construction and shortens the construction period. Construction equipment can be installed in the space frame structure itself, reducing the installation of auxiliary construction trouble. The structure has high strength and large load. The  space frame structure has more fixed ends, and in general, even if the occasional damage to the components will not necessarily cause the destruction of the entire structure. Because the space space frame structure mostly has a fixed regular pattern, it can give people a sense of impact visually. The large-span space structure has high installation efficiency and obvious installation advantages. In the case of limited engineering site, the space frame structure can not only assemble the whole roof on the ground but also to some extent.

 

The main construction methods of the space frame structure include high-altitude bulk method, block or strip installation method, integral jacking method, high-altitude slip method, and "folding expansion" integral lifting method.

High-altitude bulk method: High-altitude bulk method refers to the construction method of assembly units or direct connection with rods and nodes at a high-altitude design position. This kind of method in the construction stage of the rod and node positioning accuracy requirements are higher, the general installation sequence is: four sides to the middle installation, the middle to both sides installation and the middle to the four sides installation.

Block or strip installation method: refers to the space frame is divided into block or strip units, and then the unit is lifted to the design position with lifting equipment, and finally assembled into a whole.

High-altitude sliding method: lifting equipment is used to lift the assembled space frame unit to the sliding track, and the space frame unit is moved to the design position through the sliding track for assembly.



The overall installation method of the space frame frame: the space frame frame is assembled into a whole on the ground in advance, and then the lifting equipment is lifted to the design position for one installation.

"Folding and expanding" overall lifting method: complete the overall assembly of the reticulated shell structure on the ground, and then remove the inconsistent rods that have been assembled, so that the collapsible reticulated shell structure can reduce the construction height to the greatest extent, expand the structure after lifting to the design position, and reinstall the rods to restore the original complete ground reticulated shell structure.

With people's pursuit of building comfort, aesthetics, construction period and other factors, the space frame structure needs to be applied from standardized, scientific and systematic construction technology to improve the construction efficiency and speed up the construction process. Spatial space frame structures are mostly composed of smaller units or lattice connections of a similar style, and are usually used in roof structures.

评论

发表评论

此博客中的热门博文

What is a coal bunker?

-
图片
Coal bunker , is a structure used for storing coal. Coal bunkers play an important role in thermal power plants, coal mines and coal marshalling stations. Depending on the specific application scenario and design, there are various types of coal bunkers, such as circular coal bunkers, square coal bunkers and open coal yards. Safety Management of coal bunkers Preventing spontaneous combustion of coal: Since coal itself contains certain moisture and volatile substances, long-term exposure to the air may lead to spontaneous combustion, so the safe management of coal bunkers is of great significance in preventing spontaneous combustion of coal. Ensure the quality of coal: coal in the coal bunker usually needs to be stored for a long time, if not managed properly, it may lead to the decline in the quality of coal, such as sulphurisation, weathering and other phenomena, so it is necessary to ensure the quality of coal by strengthening the safety management of the coal bunker. Improve the eco...
阅读全文

Suspension structures

-
图片
 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...
阅读全文

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

-
图片
  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...
阅读全文