COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.) Crete, Greece, 24–26 June 2019 PASSIVE BASE ISOLATION SYSTEM FOR AN ASYMMETRIC BUILDING Karim S. Numayr 1 , Rami H. Haddad 2 , Qusai D. Ailabouni 2 , and Madhar A. Haddad 3* 1 School of Engineering, American University of Madaba, P.O. Box 2882, Madaba, Jordan e-mail: k.numayr@aum.edu.jo 2 Department of Civil Engineering, Jordan University of Science and Technology, P.O. Box 3030, Ir- bid, Jordan rhaddad@just.edu.jo, q.ailabouni@pivot.ae 3* Department of Architectural Engineering, United Arab Emirates University, P.O. Box 15551, Al Ain, UAE madhar@uaeu.ac.ae Abstract In this paper, the efficiency of base isolation of an asymmetric single-storey building subject- ed to the EL-CENTRO earthquake is investigated. Three different isolators (lead rubber bear- ing, high damping rubber bearing, and coil spring) have been employed and their efficiency in reducing the response to the earthquake tested. A magneto-rheological damper is intro- duced to improve the efficiency of different isolators. The effect of including the soft soil in- teraction on the performance of the different isolators was also investigated. The building, on grade slab and backfill are treated as lumped mass parameters in the dynamic modelling. The results indicate that passive base isolation enables the reduction of the response of an asym- metric building under dynamic loads and allows the superstructure to act as rigid body. The high damping rubber bearing performed best among the isolators examined, while semi ac- tive control allowed a reduction of ninety percent in the dynamic response. Including soil- structure interaction in the dynamic analysis increased the displacement of the suggested one storey building. Keywords: Asymmetric Building, Earthquake, Base Isolators, Soil-Structure Interaction.