TY - CHAP
T1 - Elastic Demand Spectra
AU - Pitilakis, Kyriazis
AU - Anastasiadis, Anastasios
AU - Pitilakis, Dimitris
AU - Trevlopoulos, Konstantinos
AU - Senetakis, Konstantinos
PY - 2010
Y1 - 2010
N2 - Elastic demand spectra for performance-based design are normally estimated from the acceleration elastic spectra proposed in seismic codes for different general soil categories under free-field soil conditions. Their accuracy must always be checked using recent strong ground motion records from stations with well-defined soil conditions. A comparison of the Eurocode 8 (EC8) elastic response spectra for soil categories B and C with over 300 high quality worldwide records is presented in this paper. It is shown that the EC8 demand spectra need further improvement, in order to be better correlated with actual recordings. Moreover, the design elastic spectra when applying the principles of performance-based design, should take into account the effects of soil-foundation-structure interaction and the potential foundation soil improvement, which may modify considerably the design input motion, compared to the free-field conditions. The representative cases presented herein demonstrate the importance of these two issues in the seismic design of structures. The final conclusion of the present illustrative work is that the elastic demand spectra to be used for reliable seismic design, may differ considerably from the demand spectra provided in codes which do not take into account the issues that are shortly described and discussed in this paper.
AB - Elastic demand spectra for performance-based design are normally estimated from the acceleration elastic spectra proposed in seismic codes for different general soil categories under free-field soil conditions. Their accuracy must always be checked using recent strong ground motion records from stations with well-defined soil conditions. A comparison of the Eurocode 8 (EC8) elastic response spectra for soil categories B and C with over 300 high quality worldwide records is presented in this paper. It is shown that the EC8 demand spectra need further improvement, in order to be better correlated with actual recordings. Moreover, the design elastic spectra when applying the principles of performance-based design, should take into account the effects of soil-foundation-structure interaction and the potential foundation soil improvement, which may modify considerably the design input motion, compared to the free-field conditions. The representative cases presented herein demonstrate the importance of these two issues in the seismic design of structures. The final conclusion of the present illustrative work is that the elastic demand spectra to be used for reliable seismic design, may differ considerably from the demand spectra provided in codes which do not take into account the issues that are shortly described and discussed in this paper.
UR - https://www.scopus.com/pages/publications/84858286807
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84858286807&origin=recordpage
U2 - 10.1007/978-90-481-8746-1_9
DO - 10.1007/978-90-481-8746-1_9
M3 - RGC 12 - Chapter in an edited book (Author)
SN - 9789048187454
T3 - Geotechnical, Geological and Earthquake Engineering
SP - 89
EP - 99
BT - Advances in Performance-Based Earthquake Engineering
A2 - FARDIS, MICHAEL N.
ER -