Design and analysis of Base Isolated Structure
| Author(s) | : | Hamna Shakeel, Muhammad Usman Khan, Hanif Ullah |
| Institution | : | Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan |
| Published In | : | Vol. 6, Issue 5 — May 2019 |
| Page No. | : | 122-132 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Base isolation is a method used to decouple the super structure from the ground by installing a flexible linkbetween them to make the structure safe from the damaging effects of ground motion. There are various methods to make thestructure flexible. Using High Damping Rubber Bearing (HDR) is one of the ways to increase flexibility of the structure andincrease its time period. HDR is made up of alternate layers of high damping rubber laminated with steel shims. This paperpresents a design procedure to proportion the diameter and thickness of layers of rubber and steel shims. Fixed base andbase isolated structures were modelled in ETABS. After seismic analysis of both structures, a comparative study wasconducted between the response of the two structures. Inter storey drifts and shear forces were seen to be greatly reduced inbase isolated structure. Displacement of the base isolated structure, however, was increased. Most of the deformationoccurred in the flexible HDR installed at the base. Moreover, time period of the base isolated structure greatly increased(upto 2.5sec) which decreased the probability of resonance of the structure with common time period of the earthquake onhard soil i.e in the range 0.03-0.33 sec.
Hamna Shakeel, Muhammad Usman Khan, Hanif Ullah, “Design and analysis of Base Isolated Structure”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 6, Issue 5, pp. 122-132, May 2019.
