Index Geophysics

en-US A modal seismic design procedure based on a selected level of ductility demand

en-US Determination of seismic design forces of structures is performed by the building codes usually using response reduction (or behaviour) factors that incorporate indeterminacy and ductility capacity of lateral bearing systems. In this procedure story drifts are checked as a final design step approximately preventing stories from assuming excessive ductility demands, or seismic damage. If this procedure is reversed, a more logical seismic design approach may be developed by starting with a ductility-controlled procedure. It is the incentive of this research in which by using a large number of earthquakes, first nonlinear acceleration spectra are developed for different levels of ductility demand. Then an energy-based modal procedure is developed in which the system ductility demand is distributed between the important vibration modes based on their contribution. Finally, the developed method is applied to seismic design of several buildings selected from both regular and irregular structural systems. Comparison with a sample code design establishes success of the method in developing a more rational seismic design.

Baradaran, Milad Farahanchi

Behnamfar, Farhad

en-US New Zealand Society for Earthquake Engineering

2019-06-30

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

en-US Article

application/pdf

https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/254

10.5459/bnzsee.52.2.78-94

en-US Bulletin of the New Zealand Society for Earthquake Engineering; Vol 52 No 2 (2019); 78-94

2324-1543

1174-9857

eng

https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/254/240

en-US Copyright (c) 2019 Milad Farahanchi Baradaran, Farhad Behnamfar

en-US https://creativecommons.org/licenses/by/4.0