Damage of frame Q1:What have been learned from these To Svtong Earthquako ings in Past Earthquako tool Solsmi oad Ro Design for Ductile Behavior 8.1 Behavior of a steel member ers to止 H 2 Damage of frame Q1: What have been learned from these damage phenomena of steel building structures during recent earthquakes? (1) Care in the design, detailing, and construction of steel structures is needed to assure satisfactory performance in strong earthquakes. (2) This should lead to the development of building code regulations that specifically address seismic detailing of steel building structures. • Performance of Steel Buildings in Past Earthquakes • Key Philosophy for Seismic Design of Steel Building Structures • Design Earthquake Forces • Steel Seismic Load Resisting Systems • Code Provisions for Seismic Design of Steel Buildings Design of Seismic-Resistant Steel Building Structures: A Brief Overview To Survive Strong Earthquake without Collapse: Design for Ductile Behavior ! Q2: What’s of the most importance to design a steel building economically? H H Ductility = Inelastic Deformation O dy du F y F u F A B F d d The ductility factor of steel beam is defined as du/dy, dy refers to the displacement corresponding to yield load, while du to that corresponding to ultimate. 8.1 Behavior of a steel member