钢结构档（Steel file）.doc

钢结构档（Steel file） Glossary 1, the plastic damage in effect: steel at room temperature and under static load, when the stress reaches the tensile strength of Fu after plastic deformation and large fracture, called plastic failure. 2, brittle failure: when the steel is subjected to dynamic loads (including impact load and vibration load) or in the same number of complex stress and low temperature conditions, often brittle fracture stress values are often lower than the yield strength of steel FY low stress brittle failure. 3, the welding deformation of welded components: without load, the deformation caused by temperature effect called arc welding for welding deformation. 4, the welding stress welding component without load, due to the high temperature of arc welding effect caused by stress is called the welding stress. 5, the overall instability of steel beam often adopts I-shaped steel or thin-walled cross section, the lateral tensile and torsional stiffness, relatively speaking, than the thick reinforced concrete beam is low, often in bending stress has not yet reached the yield strength before, is usually called lateral torsional buckling. The overall instability. 6, the solid column is usually made of steel or steel plate assembly. 7, lattice column: usually adopts two channel or I-beam as single limb column. 8, the steel truss is a large stiffness, timber economy, the appearance of the lattice column structure. 9, the fatigue damage in steel structure, some components not only subjected to static loads, but also the long-term effect of continuous under repeated load. The number of N cycles when the repeated load reaches a certain value, the stress in the steel was lower than the ultimate tensile strength, even lower than the yield strength, will advance to a sudden brittle fracture. Failure of plastic deformation is small, this phenomenon is known as fatigue damage of steel. 10, the shape factor: beam plastic moment Mp and the yield moment ratio of Me. 11, slende