- Author
-
Phan, L. T.
|
Todd, D. R.
|
Lew, H. S.
- Title
- Seismic Strengthening of Reinforced Concrete Frame Buildings.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- Central United States Earthquake Consortium. Earthquake Hazard Reduction in the Central and Eastern United States: A Time for Examination and Action. National Earthquake Conference Proceedings, 1993. Volume 2. May 2-5, 1993,
Memphis, TN,
235-244 p.,
1993
- Keywords
-
reinforced concretes
|
structures
|
earthquakes
|
failure
|
validation
|
seismic strengthening
|
seismic design
- Abstract
- Most reinforced concrete (RC) frame structures in the mid-western and eastern regions of the United States are built mainly for gravity loads without proper seismic design, and thus are vulnerable to severe damage in the event of a major earthquake in these regions. While the need to retrofit these RC frame structures is recognized and different strengthening techniques have been laboratory-tested and applied in practice worldwide, ability to assess the relative merits of different strengthening schemes or to predict the improved performance of a strengthened structure is still lacking. This paper describes the development of experimental-based hysteresis models of unstrengthened and strengthened concrete frames by using the system identification method. The analytical models are validated by comparing the analytical results with results of experiments on strengthened RC frames.