1. NASCC/ASCE Thursday May 13, 2010 Transforming Seismic Design in Low to Moderate Seismic Regions PDH #BN81C Session Chairs: Eric HinesCharlie Carter LeMessurierAISC Tufts University

2. Design Philosophy for Moderate Seismic Regions Reserve Capacity – CBF Ductility – EBF Elastic Flexibility – MRF Elastic Strength

3. Design Philosophy for Moderate Seismic Regions Reserve Capacity – CBF Ductility – EBF Elastic Flexibility – MRF Elastic Strength

4. Design Philosophy for Moderate Seismic Regions Reserve Capacity – CBF Ductility – EBF Elastic Flexibility – MRF Elastic Strength

5. Design Philosophy for Moderate Seismic Regions Reserve Capacity – CBF Ductility – EBF Elastic Flexibility – MRF Elastic Strength

6. Design Philosophy for Moderate Seismic Regions Reserve Capacity – CBF Ductility – EBF Elastic Flexibility – MRF Elastic Strength

7. NASCC/ASCE Thursday May 20, 2010 Eccentric Braced Frame System Performance Eric HinesCarlo Jacob LeMessurierTufts University Tufts University OCBF: V = 531k EBF: V = 162 k (266k) 0.06 IBC 2006 (USGS 2002); MSBC 2008 2% in 50 year, Sa for T = 1.0s

8. OCBF: V = 531k EBF: V = 162 k (266k) 0.06 IBC 2006 (USGS 2002); MSBC 2008 2% in 50 year, Sa for T = 1.0s

9. EBF R-Factors

10. Whittaker, Uang, Bertero (1987) Univ. California at Berkeley EBF shake table test 6-story 1/3 scale

11. UCB Test Jacob Model

12. Hysteresis at Level 2 Link UCB Test Jacob Model

13. Hysteresis at Level 2 Link Jacob UCB Model Jacob ASCE Model

14. Jacob UCB Model Jacob ASCE Model

15. 9-Story Prototype

16. Up to 72 Links max = 0.02 rad Up to 72 Links max = 0.41 rad 9-Story Prototype

17. Up to 72 Links max = 0.02 rad Up to 72 Links max = 0.41 rad Up to 48 Links max = 0.02 rad Up to 48 Links max = 0.41 rad

18. Up to 24 Links max = 0.80 rad Up to 24 Links max = 0.81 rad Up to 48 Links max = 0.02 rad Up to 48 Links max = 0.41 rad

19. Up to 24 Links max = 0.80 rad Up to 24 Links max = 0.81 rad 724824 P u / P n 0.89 1.05 GM7810 Scale2.7 3.7 0.73 Column Axial Loads 1.2D + 0.5L + 1.0E

20. 724824 P u / P n 0.89 1.05 GM7810 Scale2.7 3.7 0.73 Column Axial Loads 1.2D + 0.5L + 1.0E

21. 0.73