Seismic Steel Design 12/9/2012 自 Clause 27 of CSA-S16-01 Seismic design requirements search Kobe1995 SIGNIFICANT REVISIONS MOMENT RESISTING FRAME (MRF) 27 Seismic Design Requirements or mechanisms are designed to r this Cae他eteyPimarnwyieunalyelding ergy dissipati to b nic loads High Ductiityand aft isadvanta9道 are transmitted to the foundation. ·Low lastic Stiffness Moment Resisting Fram by Dr.Carlos E.Ventura,UBCSeismic Steel Design 12/9/2012 by Dr. Carlos E. Ventura, UBC 4 9 December 2012 19 Clause 27 of CSA-S16-01 Seismic design requirements 9 December 2012 20 Northridge 1994 Kobe 1995 SIGNIFICANT REVISIONS Research 9 December 2012 21 27. Seismic Design Requirements Capacity Design: • Specific elements or mechanisms are designed to dissipate energy; • All other elements are sufficiently strong for this energy dissipation to be achieved; • Structural integrity is maintained; • Elements and connections in the horizontal and vertical load paths are designed to resist these seismic loads; • Diaphragms and collector elements are capable of transmitting the loads developed at each level to the vertical lateral-load-resisting system; and, • These loads are transmitted to the foundation. MOMENT RESISTING FRAME (MRF) Advantages • Architectural Versatility • High Ductility and Safety Disadvantages • Low Elastic Stiffness Beams and columns with moment resisting connections; resist lateral forces by flexure and shear in beams and columns - i.e. by frame action. Develop ductility primarily by flexural yielding of the beams: Moment Resisting Frame