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Dissertation
Shake table acceleration tracking performance impact on dynamic similitude
Doctor of Philosophy (Ph.D.), Drexel University
Nov 2011
DOI:
https://doi.org/10.17918/etd-3654
Abstract
Dynamic simulations conducted on shake tables offer an economical means of examining the inelastic response of structures to earthquakes. However, past studies have shown the inability of shake-tables to precisely simulate earthquake records (so-called acceleration tracking performance). While such performance deficiencies are well-documented, their influence on the inelastic response of models has not been directly studied. The objective of the research reported herein is to establish how errors associated with earthquake tracking performance influence inelastic responses, and to identify the key parameters that affect such influences. To satisfy this objective simulated earthquake records (with acceleration tracking errors) were obtained from a unidirectional shake-table and used within a parametric study that had variables of (1) earthquake record (simulated by the Table versus Input), (2) scale, (3) model frequency, (4) degree of nonlinearity. The results indicated that a) the inability of shake tables to replicate the input (desired) signal at small physical scales resulted in error between (simulated versus real) 50 and 65% b) Energy dissipation at the global level obtained thru nonlinear simulations of finite element model replicas of the physical models shows that the shake-table simulated is notlinearly proportional to the real signal. The inelastic response is affected by: physical scale, structure height and degree of non-linearity.
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Details
- Title
- Shake table acceleration tracking performance impact on dynamic similitude
- Creators
- Miguel Angelo Cadete Andrade Mota - DU
- Contributors
- Franklin L. Moon (Advisor) - Drexel University (1970-)Ahmet Emin Aktan (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Drexel University
- Other Identifier
- 3654; 991014632408004721