Jsed for design of elements Displacement Check Elastic drift and Elasto-plastic drift requirement Duel syste 1/00 1/168 ahe鱼te,chear wall 1/1000 1/120 Stse frame 1/2s0 Elasto-plastic drift E-P Displacements under rare occurred ，=,4 Where 4 -Bade-Patic arder R.Fq 出，≤，☑圆 ed? Designa bulding? What kind of Building? How many? How to do that? 7 Used for design of elements Material Structural elements Force condition γRE Steel Column，beam, brace, connection, bolting, welding forcing stability 0.75 0.80 Reinforced Concrete beam Column with ratio of compression less than 0.15 Not less than 0.15 Share wall The other elements bending Eccentric compression E.C. E.C. Shearing, E. tension 0.75 0.75 0.80 0.85 0.85 Masonry Confined masonry wall, Masonry wall and Reinforced masonry wall shearing Shearing 0.9 1.0 RE g Displacement Check Elastic drift and Elasto-plastic drift requirements Steel frame 1/250 1/50 tube in tube , shear wall 1/1000 1/120 Duel system 1/800 1/100 RC Frame 1/550 1/50 Structure E-P supported system 1/1000 1/120 [ ] y qp [ ] q 39 p Target：No Collapse p The peak value of acceleration is about 4～6 times than that of frequently occurred earthquake. p The elements will be in elastic-plastic behavior p Using development of plastic hinges to dissipate the energy. p restrict the limitation of the drift of soft/weak story. Elasto-plastic drift under rare occurred Earthquake u h p p D £ [q ] [ ] p q 40 E-P Displacement： p p e Du =h Du Where ： Δup—— Elasto-Plastic displacement under R. Eq.； Δue—— Elastic displacement under R. Eq. ηp—— Amplified coefficient of E-P 。 How many modes should be composed? The numbers should satisfy that the 90% mass are participant in the vibration. According to some rules, based on the codes or on the required of engineering needed. Total? How many? Design a building? What kind of Building? How to do that?