The form of steel structure building arch structure

The arch structure is characterized by a large span capacity. Compared with steel bridges and reinforced concrete beam bridges, it can save a lot of steel and cement. The arch structure is also called a thrust structure. Its characteristic is that it decomposes the pressure it receives into downward pressure and outward thrust. It is the only structure among all structures that generates external thrust.

[Advantages of arch structure]

Advantages: durable, low maintenance and repair costs; beautiful appearance; simple structure, conducive to widespread adoption.

[Disadvantages of arched structure]

Disadvantages: Because it is a thrust structure, it has high requirements for the foundation; for porous continuous arch bridges, in order to prevent damage to one hole from affecting the entire bridge, special measures must be taken or one-way thrust piers must be installed to withstand unbalanced thrust, which increases Project cost: When building an arch bridge in a plain area, due to the large building height, the wiring work at both ends and the longitudinal slope of the bridge deck increase, which is extremely detrimental to traffic.

[Application of arch structure]

Arch structures are mostly used in arched roofs, arched greenhouses, and Steel structure bridges.

[Stress characteristics of arched structures]

Two hemispheres can be combined to form a sphere, and a sphere can also be regarded as a combination of several arches. The sphere is arched in all directions. If a force is applied to any part of the sphere, the force can be evenly distributed around it, so the sphere is stronger than any other shape. This is why the huge oil storage tank is made into a spherical shape. In order to transmit more light, the glass shell of the light bulb is very thin, but when it is made into a spherical shape, it is stronger. Bridges, eggs, arched doors and windows, arched bridges, and tunnels are all arch-shaped, but pot lids and umbrellas are dome-shaped, which has the characteristics of arches with high pressure and no external thrust.

When the arch is under pressure, this force will be transferred to the adjacent parts to resist the force emitted by the arch foot, so that it can withstand greater pressure.Therefore, the application of steel structure arch structures is also very extensive.