The Earthquake Engineering Online Archive

Global collapse of frame structures under seismic excitations

Ibarra, Luis F.; Krawinkler, Helmut

PEER-2005/06, Pacific Earthquake Engineering Research Center, University of California, Berkeley, 2005, pdf (400/P33/2005-06)

The main objective of the study is to develop a methodology for evaluating global (side-sway) collapse for deteriorating structural systems. The evaluation of collapse is based on a measure called the "relative intensity," which is defined as the ratio of the ground motion intensity to a structural strength parameter. The relative intensity at collapse is called "collapse capacity." The components of this methodology are (1) development of hysteresis models that incorporate all important phenomena contributing to global collapse; (2) computation of the collapse capacity for representative sets of frame structures and ground motions; (3) evaluation of statistical measures of the collapse capacity and of the effect of uncertainties in ground motions and in structural parameters on these statistical measures; (4) development of collapse fragility curves; and (5) evaluation of the mean annual frequency of collapse.

Available online: http://peer.berkeley.edu/publications/peer_reports/reports_2005/PEER_506_IBARRA_krawinkler.pdf