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Steel Structure Design Considerations for Port Storage Silo Construction at Pointe-Noire, Central Africa: Building Along the Tropical Coastline

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The port of Pointe-Noire in the Central African Republic, situated on the Atlantic coast, serves as the nation's vital economic gateway. The region experiences a typical tropical maritime climate characterised by year-round high temperatures and humidity, abundant rainfall, and strong sea breezes. As a port area, the terrain is generally flat, though it may encounter issues with foundation bearing capacity and tidal influences. Pointe-Noire Given these climatic and topographical characteristics, the following preliminary steel structure design proposal aims to provide guidance for constructing storage warehouses at Black Point Port.   Why choose steel structures ? In environments such as Black Point Port, steel-framed storage warehouses offer distinct advantages: Efficient construction: Steel components can be prefabricated off-site and rapidly assembled on-site, significantly reducing the construction timeline. For port projects, this translates to faster operational readiness an...
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Classification of steel space frame structure

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 Steel space frame is a space structure made of multiple rods connected by nodes according to a certain grid form. Constitutes the basic unit of steel space frame has triangle cone, triangular, square, truncated quadrangular cone, etc., by these basic units can be combined into a plane shape of the trilateral, quadrilateral, hexagonal, circular or any other shape. With space force, light weight, rigidity, good seismic performance and other advantages; can be used as a gymnasium, theater, exhibition halls, waiting halls, stadium bleachers canopy, hangars, two-way columns of steel mesh structure from the workshop and other buildings of the roof.

　　It can be divided into double-layer plate-type net frame structure, single-layer and double-layer shell-type net frame structure. The rods of plate-type net frame and double-layer shell-type net frame are divided into upper chord rod, net frame lower chord rod and web rod, which mainly bear tensile force and pressure; the rods of single-layer shell-type net frame, in addition to bearing tensile force and pressure, but also bear bending moment and shear force. At present, the vast majority of China's net frame structure adopts plate-type net frame structure.



　　Mainly divided into three types: one type is composed of plane truss system, there are four forms of two-way orthogonal orthotropic net frame, two-way orthotropic diagonal net frame, two-way diagonal diagonal diagonal net frame and three-way net frame; the second type is composed of quadrangular cone unit, there are five forms of orthotropic quadrangular cone net frame, orthotropic pumping quadrangular cone net frame, diagonal quadrangular cone net frame, tessellations quadrangular cone net frame and star quadrangular cone net frame; the third type is composed of triangular cone units, there are The third type consists of triangular cone unit, there are three forms of triangular cone net frame, pumping triangular cone net frame and honeycomb-shaped triangular cone net frame. Shell-type rack structure according to the shell surface form mainly has column surface shell-type rack, spherical shell-type rack and hyperbolic parabolic surface shell-type rack. Net frame structure according to the material used in steel net frame, reinforced concrete net frame and steel and reinforced concrete composed of a combination of net frame, of which the steel net frame used more.

　　The cross-section of the rods of the steel net frame structure should be determined according to the strength and stability calculation. In order to reduce the calculated length of the pressure rod to increase its stability, can be used to increase the re-split rod and support rods and other measures. The nodes of plate type net frame and double shell type net frame made of steel mainly have three forms: cross plate node, welded hollow ball node and bolt ball node. The cross plate node is applicable to the net frame structure of steel bars, and the connection between bars and node plate adopts welding or high-strength bolt connection. Hollow ball nodes and bolted ball nodes are applicable to the net frame structure of steel pipe rods. The nodes of single-layer shell-type net frame should be able to withstand the bending internal force, in general, the steel consumption of the nodes accounts for 15-20% of the steel consumption of the whole steel net frame structure.

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What is a coal bunker?

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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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