Naslov
COMPARISON BETWEEN NON-LINEAR DYNYMIC AND STATIC SEISMIC ANALYSIS OF STRUCTURES ACCORDING TO EUROPEAN AND U.S. PROVISIONS

Autori
Čaušević, Mehmed ; Mitrović, Saša

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
10. Congreso Chileno de seismologia e ingenieria antisismica / Saragoni, Rodolfo - Santiago : Asociacion Chileana de Seismologia e Ingenieria Antisismica, 2010, 1-10

Skup
1960-2010 50th Aniversario Terramoto del Sur de Chile

Mjesto i datum
Santiago, Čile, 10.07.2010. - 14.07.2010

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
non linear analysis ; Eurocode ; U.S. seismic provisions ; pushover analysis ; damage control ; concrete buildings

Sažetak
Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. This paper discusses those procedures that have been implemented into the latest Eurocodes and U.S. seismic provisions: the N2 non-linear static method (Eurocode 8) ; the non-linear static procedure NSP (FEMA 356) ; the improved capacity spectrum method CSM (FEMA 440) and non-linear dynamic time-history analysis. The presented methods differ in respect to accuracy, simplicity, transparency and clarity of theoretical background. Non-linear static procedures were developed with the aim of overcoming the insufficiency and the limitations of linear methods, whilst at the same time maintaining a relative simple application. All procedures incorporate performance-based concepts paying more attention to damage control. Application of the presented procedures is illustrated by means of an example of an eight-storey reinforced concrete frame building. The results obtained by non-linear dynamic time-history analysis and non-linear static procedures are compared. It is concluded that these non-linear static procedures are sustainable for application. Additionally, this paper discusses a recommendation in the Eurocode 8 that the capacity curve should be determined by pushover analysis for values of the control displacement ranging between zero and 150% of the target displacement defined as the seismic demand. Increasing the target displacement obtained in N2 method on the value of 145% equals the maximum displacement of the top of building as if it were obtained by non-linear dynamic time- history analysis, which is the main idea of the recommendation in the Eurocode 8. By increasing the target displacement obtained in N2 method on the value of 130%, the mean value enlarged with the standard deviation obtained by non- linear dynamic time-history analysis will be reached. At the end of this paper it is concluded that despite the stated insufficiency non-linear static methods can be a valuable tool in estimating the seismic structural performance for structures in which the influence of the higher modes is negligible.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Građevinarstvo, Temeljne tehničke znanosti

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