On the design and seismic response of RC frame buildings designed with Eurocode 8

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On the design and seismic response of RC frame buildings designed with Eurocode 8

Author: Jorge A. Rivera · Lorenza Petrini | Size: 852 KB | Format: PDF | Publisher: Bull Earthquake Eng | Year: 2011 | pages: 24

Bull Earthquake Eng
DOI 10.1007/s10518-011-9290-2
ORIGINAL RESEARCH PAPER

On the design and seismic response of RC frame buildings designed with Eurocode 8

Jorge A. Rivera · Lorenza Petrini

Received: 5 February 2009 / Accepted: 2 June 2011
© Springer Science+Business Media B.V. 2011

Abstract:

Performance-Based Seismic Design is now widely recognized as the pre-eminent seismic design and assessment methodology for building structures. In recognition of this, seismic codes may require that buildings achieve multiple performance objectives such as withstanding moderate, yet frequently occurring earthquakes with minimal structural and non-structural damage, while withstanding severe, but rare earthquakes without collapse and loss of life. These objectives are presumed to be satisfied by some codes if the force-based design procedures are followed. This paper investigates the efficacy of the Eurocode 8 forcebased design provisions with respect to RC frame building design and expected seismic performance. Four, eight, and 16-storey moment frame buildings were designed and analyzed using the code modal response spectrum analysis provisions. Non-linear time-history analyses were subsequently performed to determine the simulated seismic response of the structures and to validate the Eurocode 8 force-based designs. The results indicate the design of flexural members in medium-to-long period structures is not significantly influenced by the choice of effective member stiffness; however, calculated interstorey drift demands are significantly affected. This finding was primarily attributed to the code’s enforcement of a minimum spectral ordinate on the design spectrum. Furthermore, design storey forces and interstorey drift demand estimates (and therefore damage), obtained by application of the code force-based design procedure varied substantially from those found through non-linear time-history analysis. Overall, the results suggest that though the Eurocode 8 may yield lifesafe designs, the seismic performance of frame buildings of the same type and ductility class can be highly non-uniform.

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