Isolator displacements, floor accelerations, roof displacements, base shear and
torsional moments are basic parameters that are considered in the design of
seismically isolated structures. The aim of this study is to evaluate the effects of bidirectional
earthquake excitations of near fault records on the response of base
isolated structures in terms of basic parameters mentioned above. These parameters
computed from nonlinear response history analysis (RHA) and they are compared
with the parameters computed from equivalent lateral force procedure (ELF). Effect
of asymmetry in superstructure is also examined considering mass eccentricity at
each floor level. Torsional amplifications in isolator displacements, floor
accelerations, roof displacements and base shear are compared for different level of
eccentricities. Two buildings with different story heights are used in the analyses.The building systems are modeled in structural analysis program SAP2000. The
scaling of ground motion data are taken from the study of &ldquo / Response of Isolated
Structures Under Bi-directional Excitations of Near-fault ground Motions&rdquo / (Ozdemir,
2010). Each ground motion set (fault normal and fault parallel) are applied
simultaneously for different range of effective damping of lead rubber bearing (LRB)
and for different isolation periods.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12614121/index.pdf |
| Date | 01 March 2012 |
| Creators | Fitoz, Hatice Eda |
| Contributors | Akyuz, Ugurhan |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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