Abstract
High strength steel structure is more and more widely used in the field of building structure because of its advantages in mechanical properties. The design of high-strength steel frame often refers to steel structure. For the high-strength steel with no yield platform of stress-strain curve, the influence of plastic strain before the nominal yield strength of its material on the results of the frame remains to be studied. In order to study the influence of plastic effect on high-strength steel frame, the second-order elastic-plastic analysis of typical frame is carried out and compared with the simplified design method of steel structure design standard. The results show that the plastic effect has no significant effect on the bending moment and lateral displacement of high-strength steel frame in most cases. Base on the analysis results, the design suggestions of high-strength steel frame structure are put forward.
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