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- Title
Seismic response of elastic multidegree of freedom oscillators placed on the top of rocking storey.
- Authors
Bantilas, Kosmas E.; Kavvadias, Ioannis E.; Vasiliadis, Lazaros K.
- Abstract
In the present study, the seismic response of multistorey structures placed on the top of a rocking storey is examined. For this purpose, an analytical model that allows the interaction of all vibration modes of the superstructure with the rocking base is introduced. As uplift of the rocking base modifies the dynamic properties of the superstructure, modal analysis is performed and the vibration mode properties during rocking are demonstrated. Subsequently, dynamic time history analyses are performed and the effect of higher vibration modes of the superstructure on the rocking response is investigated. In addition, the seismic demands of the superstructure as well as their distribution throughout the storeys are examined. The results indicate that the higher vibration modes affect the rocking response of the base, although their influence depends on the stiffness of the superstructure. Furthermore, the seismic demands of the superstructure depend primarily on the size of the rocking columns. Finally, during rocking response all the vibration modes are excited and contribute to the distribution of the seismic loads throughout the floors of the superstructure.
- Subjects
SEISMIC response; MODAL analysis; ROCK properties; EARTHQUAKE engineering; LIBERTY
- Publication
Earthquake Engineering & Structural Dynamics, 2021, Vol 50, Issue 5, p1315
- ISSN
0098-8847
- Publication type
Article
- DOI
10.1002/eqe.3400