Building codes are undergoing a conceptual transition stage. Codes now are directed towards utilizing the concept of performance-based design engineering. Performance-based seismic engineering expresses the design criteria in terms of achieving certain performance objectives when the structure is subjected to defined seismic hazard levels. Recent seismic events highlighted the significance of applying multiple performance objectives in the design criteria of the structure.
The objective of this study is to investigate the development of design yield spectra and to evaluate the various factors that affect its general characteristics. The study addresses the effect of near-fault (NF) and far-field (FF) earthquakes, the magnitude of the earthquake, the directivity effect and the effect of different types of soils on the yield spectra using actual earthquake ground-motion records. Permissible design regions representing the different earthquake hazards are formed in order to develop design spectra suitable for code application.
Actual earthquake records are used in this study to conduct realistic analysis and make valid response comparisons. Records are classified according to the points of investigation. For the analysis, a SDOF system is subjected to the chosen set of ground motions scaled to different peak ground acceleration levels. Linear and nonlinear dynamic analyses of the system are performed. The yield spectra are formed using the analysis results. The effect of each of the classification categories on the spectra formation is investigated.
To attain multiple performance objectives in the yield spectra method, a graphical procedure is formed to develop an admissible design region plot in which the combinations of strength and stiffness serve these multiple objectives.
The yield spectra (YS) design procedure is outlined. An example for using the YS design procedure in combination with the admissible design region plot is illustrated. An investigation of the effectiveness of this procedure, and where it lies within the spectrum of available methods is discussed. / Thesis / Master of Applied Science (MASc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/30023 |
| Date | 05 1900 |
| Creators | Abdelaziz, Noha |
| Contributors | Civil Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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