Engineering Characteristics of the 2006 Yogyakarta Earthquake Ground Motions and its Implication on the Inelastic Response of RC Structure

Elnashai et al. [1], published the best estimated ground motion records of the 2006 Yogyakarta earthquake; however, the digitized data was not available. By using manual processes, the approximate digitized data could finally be made. By using spectral matching, the approximate ground motion digitized data was modified to match up to the original response spectrum published by Elnashai et al. [1], . Multi-storey reinforced concrete (RC) structure was used as a building model and Ruaumoko Computer Package Programs [13] was used in this investigation. Since earthquake records in Indonesia are very rare, engineering characteristics of the 2006 Yogyakarta and its implications to the inelastic structural response needs to be explored as compared to the 1940 El Centro earthquakes. Results of the investigation show that the 2006 Yogyakarta earthquake caused higher results in almost all of the ground motion parameters as compared to the 1940 El Centro NSC earthquake. Moreover, the inelastic structural responses subjected to the 2006 Yogyakarta earthquake were also much higher than those caused by the 1940 El Centro NSC earthquake.