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Erschienen in:
2022 | OriginalPaper | Buchkapitel
Yielding Mode Classification of Composite Beam-Square Hollow Section Column Subassemblies Under Bidirectional Loading
verfasst von : Yandong Wang, Yuji Koetaka
Erschienen in: Proceedings of the 10th International Conference on Behaviour of Steel Structures in Seismic Areas
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Abstract
It is well known that not only beams and columns but also panel zones in steel moment-resisting frames (MRFs) can yield under strong ground motions. In order to understand the yielding parts of the MRFs (hereafter, the yielding mode), a past study has proposed a method of classifying the yielding mode of a cruciform plane frame with elastic-perfectly plastic material properties. This method determines that one component among beams, columns and panel zones can yield, however for the MRFs with actual material properties, multiple components may yield.
This paper discusses the modified yielding mode classification for the MRFs with actual material properties. The targeting steel MRFs are three-dimensional cruciform subassemblies that consist of square hollow section columns and H-shaped beams, including composite beams. To validate the modified yielding mode classification, a finite element analysis of the subassemblies under cyclic bidirectional horizontal loading is conducted. As a result, it is clarified that the modified yielding mode classification is valid regardless of the loading direction, value of the axial force of columns, and the presence of the floor slab.