Dynamic analyses of isolated structures under bi-directional excitations of near-field ground motions

Article type: Research Article

Authors: Ozdemir, Gokhan | Akyuz, Ugurhan

Affiliations: Department of Civil Engineering, Middle East Technical University, Ankara, Turkey

Note: [] Corresponding author: Middle East Technical University K2 204 Ankara, 06531, Turkey. Tel.: +90 312 2105459; Fax: +90 312 2107991; E-mail:han@metu.edu.tr

Abstract: Nonlinear response history analyses (NRHA) of a 3-story isolated reinforced concrete (RC) building are carried out under both uni- and bi-directional earthquake excitations of near-field records. NRHA are conducted for a wide range of yield strength (Q/W) of lead rubber bearings (LRB), and isolation period (T). Selected near-field records are used to investigate both the contribution of orthogonal components on maximum isolator displacements and accuracy of equivalent lateral force (ELF) procedure on estimation of maximum isolator displacements. Analyses results show that both the contribution of orthogonal components and accuracy of ELF procedure depend on the soil condition where isolation system is implemented.

DOI: 10.3233/SAV-2011-0646

Journal: Shock and Vibration, vol. 19, no. 4, pp. 505-513, 2012