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What is the quality inspection agency for steel structure projects?
Release Date:
2020/02/18
Steel structure quality inspection agencies note that, as the name suggests, steel structures are a type of construction in which steel is the primary material used in manufacturing and fabrication, making them an extremely important category in today’s construction industry. Owing to the inherent characteristics of steel—lightweight, high strength, and excellent resistance to deformation—steel structures have earned widespread recognition within the building sector and are being increasingly incorporated into a broad range of construction projects. The penetration rate of steel structures in a given country has come to serve as an indicator of its level of economic development: the greater the number of steel-structured facilities, the higher the country’s economic and technological standing. In China, following the completion of the “Bird’s Nest”—the main venue for the 2008 Olympic Games, a landmark steel structure—steel structures have become particularly sought-after in the architectural community. The stability of steel structures can be categorized into two aspects: overall structural stability and member-level stability. With respect to overall structural stability, in the longitudinal direction the structure relies primarily on its bracing system to ensure stability—for example, intercolumnar bracing in steel columns and horizontal and vertical bracing in the top and bottom chords of steel roof trusses. The effectiveness of this bracing system in reliably transferring longitudinal lateral loads (such as wind loads, seismic loads, and crane loads in industrial buildings) is critical. In the transverse direction, stability is ensured by the inherent stiffness of the structural frame or portal frame itself, with particular emphasis on the structure’s ability to reliably transmit transverse lateral loads. As for member-level stability, it is mainly maintained by the intrinsic stiffness of the individual components; the goal is to prevent buckling and loss of stability under load in both the members themselves and their constituent parts (such as bars or plates)—a phenomenon that typically occurs in compression members or flexural-compression members.
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