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Grid structure

Gridstructurefeatures:1.Thegridisameshstructurecomposedofmanypoleframes.Itisahigh-orderstaticallyindeterminatespacestructure.Thegridstructurecanbedividedintotwotypes:aflatgridandacurvedgrid.2,theuseof

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Grid structure

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Grid structure features:

1. The grid is a mesh structure composed of many pole frames. It is a high-order statically indeterminate space structure. The grid structure can be divided into two types: a flat grid and a curved grid.

2, the use of flat grids, the advantages are: space force system, the rods mainly bear axial forces, the force is reasonable, the overall material performance is good, the stiffness is large, the seismic performance is good. The type of rod is small and suitable for industrial production.

3. The flat net frame can be divided into two types: cross truss system and pyramid system. The pyramid system is more reasonable and more rigid.

4. The ratio of the height of the grid to the short span is generally around 1/15. The grid members are generally made of steel pipes, and the nodes generally use ball nodes.

First, the arch structure:

(1) The force characteristics and application scope of the arch:

1. The arch is a structure with thrust, and its main internal force is axial pressure. Large-span arch structures can be constructed from concrete with good compressive properties.

2. Due to the reasonable force of the arch structure, it is widely used in buildings and bridges. Applicable to gymnasiums, exhibition halls, etc.

(2) Type of arch: The arch can be divided into three hinged arches, two hinged arches and no hinged arches, and the latter two arches are used more.

(2) Suspension structure

(1) The suspension cable structure is one of the ideal large-span structural forms and is widely used in bridges. The main load-bearing members of the suspension cable structure are tensioned steel cables, which are made of high-strength steel strands or steel wire ropes.

(2) The pulling force of the cable depends on the sag in the span, and the smaller the sag, the greater the pulling force. The sag of the cable is typically 1/30 of the span.

(3) Thin-walled spatial structure

(1) Also known as the shell structure. It belongs to the space-stressed structure and mainly bears the axial pressure in the curved surface, and the bending moment is small.

(2) Thin shells are often used in large-span roof structures, such as exhibition halls, clubs, and hangars. The thin-shell structure is mostly made of cast-in-place reinforced concrete, which is costly and time-consuming.