Research Information System
9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium, Toronto, Canada, 25 - 29 July 2010, vol.2, pp.1162-1171, (Full Text)
During the last two decades, many nonlinear analysis procedures have been proposed for earthquake response determination of the structures. The nonlinear response history analysis (NRHA) is accepted as the most accurate source of information for nonlinear seismic response, but nonlinear static procedures (NSP) may also provide reasonable estimates of seismic demand and inelastic behavior. However, all proposed NSPs have limitations due to the inherent approximations and simplifications including load pattern and single mode considerations. On August 17, 1999, Turkey experienced an un-planned large scale testing of buildings during the Marmara Earthquake. It would appear that, using building response observations from this earthquake and performing "back calculations" for selected structures, it might be possible to assess the "global" performance of performance assessment procedures that have been developed. The rhetorical question, "had we known one day in advance that this earthquake would occur, could we have estimated their performance globally using the widely used NSPs?" deserves an informed answer. Moderately and heavily damaged buildings have been sampled from Adapazari / Sakarya and their models built for this purpose. For this study, two moderately and two heavily damaged buildings have been selected from the building pool and a number of analysis procedures have been applied to them. For the performance assessment of buildings, the following analysis procedures have been used: NSPs of ATC-40, FEMA-356, FEMA-440, Modified Modal Pushover Analysis (MMPA), and NRHA. The study has concentrated on NSPs. These are compared with the global building performance of selected buildings. Because global damage states for buildings are known, comparing them with predictions from analyses using NSPs is done. This way, the NSP Methods are evaluated and checked whether they have estimated the global damages suitably. The study has been concluded as; there is no safety for the compatibility of pushover procedures with field observations, yet.