NEHRP Clearinghouse

Title
Evaluation of Seismic Retrofit of Reinforced Concrete Frame Structures: Part 2. Experimental Performance and Analytical Study of a Retrofitted Structural Model.
File
PB93198315.pdf
Author(s)
Bracci, J. M.; Reinhorn, A. M.; Mander, J. B.
Source
National Science Foundation, Washington, DC.; New York State Science and Technology Foundation, Albany., December 8, 1992, 197 p.
Identifying Number(s)
NCEER-92-0031
Abstract
The report is Part II of a two part series on the evaluation of seismic retrofit methods for concrete frame structures. It deals with the behavior of the entire structural system when several retrofit techniques are applied to individual components. An analytical and an experimental study was done on a scaled model of a structure and several retrofit techniques were evaluated. In the report the evaluation of three retrofit techniques, i.e., concrete jacketing method, masonry jacketing method, and partial frame masonry infill, is presented based on an analytical study of retrofitting a typical lightly reinforced frame designed according to ACI 318-89 only for gravity loads (1.4D + 1.7L). The analytical modeling, based on component information (obtained from the study presented in Part I of this report series), shows that the overall response of retrofitted structures can be adequately estimated, if good information is available for the components.
Keywords
; Dynamic response; Seismic waves; Ground motion; Earthquake resistant structures; Earthquake engineering; Loads (Forces); Structural design; Reinforced concrete; Seismic effects; Elastic analysis; Concrete structures; Framed structures; Dynamic structural analysis