1. Response of Steel MRF to Puente Hills simulated motions Anna Olsen Tom Heaton Dean John Hall Caltech Civil Engineering

2. Model: 20 story steel moment-frame building  20 story steel moment-frame building plus one basement.  Designed according to the 1994 UBC  Natural period is 3.5 sec  H=77.88 m Frame ElevationFloor Plan

3. 20-story SMRF

4. 6-story SMRF (1.54 sec period)

5. Faults Modeled 1. Sierra Madre (7.0) 2. Santa Monica SW (6.3) 3. Hollywood (6.4) 4. Raymond (6.6) 5. Puente Hills I (6.8) 6. Puente Hills II (6.7) 7. Puente Hills (all) (7.1) 8. Compton (6.9) 9. Newport-Inglewood (6.9) 10. Whittier (6.7) Day and others, 2005

6. Coordination Scheme UCB - LLNL UCSBCMUURS (RG) URS (AP) S. MadreF,R,SC S. Mon.F,RC HollyWF,RC RaymF,RC P.Hills6.8F,RC P.Hills6.7F,RC P.Hills7.1F,R,R,SC CompF,R,SC N-I N.R,SFC Whit N.RFC F = 6 3D scenarios C = single cross-check R = 1D rock reference simulation S = 1D basin-profile simulation

7. Puente Hills M 7.1

8. Puente Hills M 7.1 (2sec. Bandpass)

9. Downtown LA site for M 7.1 Puente Hills DLA

10. Puente Hills (M7.1) LA downtown 6-story with perfect welds

11. Puente Hills (M7.1) LA downtown 6-story with brittle welds

12. Puente Hills (M7.1) LA downtown 20-story with perfect welds

13. Puente Hills (M7.1) LA downtown 20-story with brittle welds

14. Mid-city site for M 7.1 Puente Hills MC

15. Puente Hills (M7.1) mid-city 6-story with perfect welds

16. Puente Hills (M7.1) mid-city 6-story with brittle welds

17. Puente Hills (M7.1) mid-city 20-story with perfect welds

18. Puente Hills (M7.1) mid-city 20-story with brittle welds

19. West LA site for M 7.1 Puente Hills WLA

20. Puente Hills (M7.1) West LA 6-story with perfect welds

21. Puente Hills (M7.1) West LA 6-story with brittle welds

22. Puente Hills (M7.1) West LA 20-story with perfect welds

23. Puente Hills (M7.1) West LA 20-story with brittle welds

24. Puente Hills M 7.1 6-story with perfect welds

25. Puente Hills M 7.1 6-story with brittle welds

26. Puente Hills M 7.1 20-story with perfect welds

27. Puente Hills M 7.1 20-story with brittle welds

28. Graves

29. Comparison of Graves motions vs SCEC motions for downtown LA

30. Comparison of Graves motions vs SCEC motions for Whittier

31. Graves scenario and 6-story with perfect welds

32. Graves scenario and 6-story with brittle welds

33. Graves scenario and 20-story with perfect welds

34. Graves scenario and 20-story with brittle welds

35. Are We Addressing the Right Questions in Earthquake Engineering? Current methodology assumes 1) architecture and 2) seismic hazard. Simplified assumptions about nonlinear building response (ductility factors) are used to produce a design. “collapse mechanisms” are rarely defined. Earth scientists are almost never asked if it is possible that the site will experience motions that can trigger the collapse mechanisms. Choose designs that are least susceptible to poorly predicted ground motions. It’s really tough to predict fault slip and hence long- period ground motions.

37. Graves

39. Puente Hills (East segment, M 6.8,epi 2) SCEC/PEER

41. Puente Hills (East segment, M 6.8) SCEC/PEER slip models

42. Puente Hills (East segment, M 6.8) 6-story with brittle welds

44. Puente Hills (East segment, M 6.8) 6-story with perfect welds

46. Puente Hills (East segment, M 6.8) 20-story with brittle welds

48. Puente Hills (East segment, M 6.8) 20-story with perfect welds

50. Puente Hills LA Segment (M 6.7)

52. Puente Hills LA Segment (M 6.7) Slip

53. Puente Hills LA Segment (M 6.7) 6-story with brittle welds

55. Puente Hills LA Segment (M 6.7) 6-story with perfect welds

57. Puente Hills LA Segment (M 6.7) 20-story with brittle welds

59. Puente Hills LA Segment (M 6.7) 20-story with perfect welds

61. Puente Hills M 7.1

62. Puente Hills M 7.1 6-story with brittle welds

63. Puente Hills M 7.1 6-story with perfect welds

64. Puente Hills M 7.1 20-story with brittle welds

65. Puente Hills M 7.1 20-story with perfect welds

66. Graves downtown site 1 20-story with brittle welds

67. Graves downtown site 2 20-story with brittle welds

68. Graves downtown site 3 20-story with brittle welds

69. Graves downtown site 4 20-story with brittle welds

70. Graves downtown site 5 20-story with brittle welds

71. Graves downtown site 6 20-story with brittle welds

72. Graves downtown site 7 20-story with brittle welds

73. Graves downtown site 8 20-story with brittle welds

74. Graves downtown site 9 20-story with brittle welds