Some factors considered in the selection of lightweight steel structure

Lightweight steel structures are subjected to static or dynamic loads; often, sometimes, or by chance (e.g., earthquakes); and often, full or not often loaded. Should be based on the above characteristics of the load selection of appropriate steel, and put forward the necessary quality assurance project requirements.The structural elements that directly bear dynamic load should choose good quality and good toughness;the lightweight steel structure under static or dynamic loads can be generally used indirect quality steel.

The plasticity and toughness of the steel decreases with the temperature drop of small,At low temperature, especially when the ductile brittle transition temperature decreases sharply, prone to brittle fracture.Therefore, on often in or may be in a lower negative temperature of the china steel structure, especially welding structure, should choose the steel which chemical composition and mechanical properties of better quality and ductile brittle transition temperature is lower than the environmental temperature.

Lightweight steel structure

Steel structural connection can be classified as welded or non welded (bolts or rivets).For welding china steel structure, the uneven heating and cooling of the welding often causes a high welding residual stress in the components; Welding china steel structure is very difficult to avoid the welding defects often make the structure of the existence of crack damage; The overall continuity and rigidity of the welded china steel structure is easy to make the defect or crack cross each other; In addition, it will seriously affect the welding of steel if the content of carbon and sulfur is too high.

Therefore, the quality of welded steel structure is higher than non welded steel structure at the same situation. The contents of harmful elements such as carbon, sulfur, phosphorus and other harmful elements should be lower, and the plasticity and toughness should be better.

This blog is published by the China steel structure manufacturer Jiangsu Andy Steel Structure Co. Ltd.