冷弯型钢抗弯框架的延性研究

对地震作用下抗弯框架中冷弯型钢构件的选用进行研究。冷弯型钢构件的主要不足是薄壁单元的平面外刚度很小,延性也很差。抗弯框架的主要构件为梁、柱及梁柱节点。在抗震框架中,梁能提供足够的延性,而其他单元主要受弹性域的限制。研究了带弯曲翼缘的新型冷弯型钢梁性能,并与传统钢梁比较。新型梁柱节点包含一个节点板,它能限制节点传递来的力引起的平面外变形。通过有限元分析,研究了新型冷弯型钢梁及梁柱节点的性能。结果表明:新型梁构件及节点的延性比传统冷弯型钢框架单元更好。

Ductile Moment-Resisting Frames Using Cold-Formed Steel Sections: an Analytical Investigation

This paper presents an investigation on the potential use of cold-formed steel sections (CFS sections) in moment-resisting frames (MRFs) for seismic applications. The main limitation of CFS sections is the low out-of-plane stiffness of their thin-walled elements which leads to low ductility. The main components of MRFs are beams, beam-column connections and columns. In earthquake resistant MRFs, the beams are designed to provide considerable ductility, whereas the other elements are mainly limited to their ...