Comparison between non-linear dynamic and static seismic analysis of structures according to European and US provisions

[admin]

Comparison between non-linear dynamic and static seismic analysis of structures according to European and US provisions

 مقایسه تحلیل لرزه ای استاتیکی و دینامیکی غیر خطی بر مبنای آیین نامه اروپا و آمریکا

Mehmed Causevic · Sasa Mitrovic

Abstract 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 European and US seismic provisions: non-linear dynamic time-history
analysis; N2 non-linear static method (Eurocode 8); non-linear static procedure NSP (FEMA
356) and improved capacity spectrum method CSM (FEMA 440). 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 limitations of linear methods, whilst at the same time maintaining a relatively 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 8/1 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. Maximum top displacement of the analyzed structure obtained
by using dynamic method with real time-history records corresponds to 145% of the target
displacement obtained using the non-linear static N2 procedure.
Keywords Non-linear dynamic analysis · Non-linear static methods ·
Pushover analysis · N2, NSP and CSM methods

 

Hidden Content

Give reaction or reply to this topic to see the hidden content.

Hidden Content

Give reaction or reply to this topic to see the hidden content.