Experimental Methods for Selecting Base Isolation Parameters for Public Buildings

Y. Ribakov*, I. Iskhakov
1 Department of Civil Engineering, Ariel University Center of Samaria, Ariel, Israel.

Article Metrics

CrossRef Citations:
Total Statistics:

Full-Text HTML Views: 123
Abstract HTML Views: 1016
PDF Downloads: 322
Total Views/Downloads: 1461
Unique Statistics:

Full-Text HTML Views: 99
Abstract HTML Views: 682
PDF Downloads: 240
Total Views/Downloads: 1021

Creative Commons License
© Ribakov and Iskhakov

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Civil Engineering, Ariel University Center of Samaria, Ariel, Israel. E-mail:


As a rule, public buildings should have higher safety level compared to residential ones. Hence, using base isolation systems is an effective and widely known way for improving dynamic response of such buildings. The idea of base isolation was known hundreds years ago, however practical implementation of base isolators started in the last few decades. The main advantage of a base isolation system is that no elements should be added to an isolated building, which is especially important for heritage architecture, forming a part of public buildings. Traditional base isolation system is obtained by using two main base isolator types – elastomeric bearings or friction pendulums. Hundreds of buildings all over the world are provided by such isolators and proved enhanced dynamic behavior. Design of base isolation systems and selection of their properties usually depend on dynamic characteristics of the isolated building. The last can be obtained, for example, by non-destructive impulse testing of the structure before its protection. An appropriate method for structural dynamic parameters experimental estimation was developed by the authors. For this reason an impulse test was carried out on a three-story structural part of a building designed for a seismic region. Another method, which is also discussed in the paper, is based on seismic monitoring of a building in a waiting regime. In some cases the displacements at the base isolation level are rather big and exceed the allowed limits. In such cases it is recommended to add dampers to the base isolation system. Effective variable friction dampers were proposed and tested by the authors. These dampers significantly reduce the displacements between the first floor column and foundation and additionally yield further improvement in the structural seismic response.