Steel structure is a structure mainly made of steel, characterized by steel beams, steel columns, steel trusses, and other components made of section steel and steel plates; Structures connected by welds, bolts, or rivets between components or components are one of the main types of building structures.
(1) Inadequate structural bearing capacity due to load changes, extended service, and changes in codes and regulations;
(2) Due to various unexpected deformations, twists, disabilities, depressions, etc. of the components, the cross-section of the components is weakened, the rod is warped, and the connection is cracked;
(3) Deformation, cracking, and warpage of components or connections caused by temperature differences;
(4) Corrosion due to chemical erosion and electrochemical corrosion resulting in weakening of the cross-section of steel structural members;
(5) Others include errors in design, production, and construction, as well as illegal use and operation during the service period.
