- Author
- Lin, A. N. | Shenton, H. W., III | Lew, H. S.
- Title
- Relative Performance of Fixed and Isolated Structures.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- World Conference on Earthquake Engineering, 10th. July 19-24, 1992, A. A. Balkema/Rotterdam/Brookfield, Madrid, Spain, 2485-2490 p., 1992
- Keywords
- structures | earthquakes | stastistical analysis | time histories | frame designs | steel moment frame | concrete moment frame
- Abstract
- Base isolation has yet to receive widespread acceptance and implementation in the design of non-critical facilities. One reason for this is the lack of equivalent performance/cost comparison data for base-isolated and fixed-base structures. Presented are the results of an investigation in which the performance of several fixed-base and base-isolated structures were compared. Four-story, steel and concrete moment resisting frames were designed in accordance with the 1990 Structural Engineers Association of California recommended provisions. The base-isolated structures were designed to varying fractions of the recommended lateral force. Non-linear time history analyses were conducted for an ensemble of recorded earthquakes. Statistical analysis of peak response quantities demonstrates the superior performance of the isolated structures. Results illustrate that comparable performance is generally achieved when the isolated frames are designed to between 25% and 50% of the recommended lateral force.