Application of the hybrid force/displacement (HFD) seismic design method to composite steel/concrete plane frames

摘要: Abstract This paper proposes a performance-based seismic design method for composite steel/concrete moment-resisting frames (MRFs) consisting of I steel beams and square concrete filled tube (CFT) columns. The has to do with the hybrid force/displacement (HFD) method, which combines advantages both force-based displacement-based procedures. incorporates predefined values maximum story drift local ductility target roof displacement then determines appropriate behavior (strength reduction) factor limiting ductility. HFD uses conventional elastic response spectrum analysis takes into account influence structural parameters, such as number stories, beam-to-column stiffness strength ratio well material strength. Comparisons proposed those adopted by current codes demonstrate that procedure appears be more rational efficient indicating tendency overestimate underestimate inter-story along height frames. Furthermore, comparisons between CFT-MRFs pure ones reveal first type seems cost-effective structures than latter since they are associated higher implying better former.