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MAX STORY DUCTILITY vs NORM. STRENGTH
Ns9,T>0.9,5=0 05, KI, S,, BH, 9aO 015, Peak-Oriented Model,
tt,=0 05,5^5,*4, ae= 0 10. y.aS Yc»8 . rk=8 , Y.=» , A.=0, LMSR
(Sj/Tl vs PROBABILITY OF COLLAPSE, 1=0.5 s
Peak Oriented Model, LMSR-N, £=5%, P-A='0.1N'
o,=0.05, oc^Var, 5,y6y=Var, Ys.c^=Var
I «1
/ — Ywjyr'SO, 5^=4, Oe.-0.30
YIAM* 100, 5^=4, a^-O.lG
/ __ Y.tM-Inf, 5^=6, a^-0.10
10 20 30
Maximum Story Ductility Over the Height, li5JB«,
Figure 8. ID As for a Deteriorating System and
Collapse Statistics
Figure 9. Collapse Fragility Curves for Systems
with Various Deterioration Properties; T = 0.5 sec.
For performance targets associated with monetary losses and downtime, the need exists (at least at this
time) to use DMs as intermittent variables m order to close the loop from EDPs to DVs. The paper by
Miranda and Aslani (2002) discusses the use of DMs in the context of loss estimation. This paper, and
many others that cannot be quoted because of space constraints, provide an overview of the status quo
of the research effort on performance-based earthquake engineering carried out by the PEER Center.
ACKNOWLEDGEMENTS
The work summarized in this paper is part of a multi-year research effort on seismic performance
assessment. Many individuals have contributed to this research, which is a multi-institutional and
multi-disciplinary effort directed and sponsored by the Pacific Earthquake Engineering Research
(PEER) Center. Funding for the Center is provided by the National Science Foundation, by various
agencies of the State of California, and by industry. This support is gratefully acknowledged.
REFERENCES
Cornell, A. and Krawinkler, H. (2000). Progress and Challenges in Seismic Performance Assessment.
PEER News, April 2000.
Ibarra, L, Medina, R., and Krawinkler, H. (2002). Collapse assessment of deteriorating SDOF
systems. Proceedings of the 12 th European Conference on Earthquake Engineering, London.
Krawinkler, H. (1997). Research issues in performance based seismic engineering. Seismic Design
Methodologies for the Next Generation of Codes, Fajfar, P., and Krawinkler, H., Editors, Balkema,
Rotterdam, 47-58.
Krawinkler, H., Medina, R., and Alavi, B. (2003). Seismic drift and ductility demands and their
dependence on ground motions. Accepted for publication in the Journal of Engineering Structures.
Luco, N. and Cornell, C.A. (2002). Structure-specific scalar intensity measures for near-source and
ordinary earthquake ground motions. Earthquake Engineering & Structural Dynamics.
Miranda, E. And Aslani, H. (2002). Probabilistic estimation of building response for loss estimation.
Proceedings, ICANCEER 2002.