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- Title
Energy Capacity of Waffle-Flat-Plate Structures with Hysteretic Dampers Subjected to Bidirectional Seismic Loadings.
- Authors
Donaire-Ávila, Jesús; Galé-Lamuela, David
- Abstract
Featured Application: The results of this study can be applied to design reinforced concrete (RC) waffle-flat-plate structures with hysteretic dampers capable of enduring bidirectional seismic loadings under different seismic performance levels. The levels tested were: fully operational (elastic), operational (damage only in dampers), and near collapse (damage in dampers and in RC structure). This study investigates the capacity, in terms of energy, of waffle-flat-plate (WFP) structures with hysteretic dampers subjected to biaxial seismic actions. A numerical model was developed and calibrated with the experimental results obtained from shake-table testing carried out on a WFP specimen subjected to biaxial seismic loads. Then the WFP system was retrofitted with hysteretic dampers—slit-plate dampers (SPDs)—and the numerical model was subjected to different sets of ordinary ground motion records to attain different seismic performance levels (SPLs). Each set of records was applied in a sequence of scaled seismic simulations until the SPL of near collapse was achieved. The capacity in terms of input energy and dissipated energy are presented for the different SPLs, taking into account the differences observed under unidirectional and bidirectional seismic loadings. Furthermore, the level of damage (i.e., accumulated plastic deformations), the level of ductility and the relationship between them—expressed as equivalent number of cycles—are also shown for both the WFP system and the hysteretic dampers. The seismic capacity of the WFP system is found to be significantly enhanced by the inclusion of hysteretic dampers.
- Subjects
WORLD Food Programme; SEISMIC response; REINFORCED concrete; MATERIAL plasticity; ENERGY dissipation; DUCTILITY
- Publication
Applied Sciences (2076-3417), 2020, Vol 10, Issue 9, p3133
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app10093133