NEHRP Clearinghouse

Title
Evaluation of Seismic Retrofit of Reinforced Concrete Frame Structures: Part 1. Experimental Performance of Retrofitted Subassemblages.
File
PB93198307.pdf
Author(s)
Choudhuri, D.; Mander, J. B.; Reinhorn, A. M.
Source
National Science Foundation, Washington, DC.; New York State Science and Technology Foundation, Albany., December 8, 1992, 132 p.
Identifying Number(s)
NCEER-92-0030
Abstract
The report is Part I of a two part series on the evaluation of seismic retrofit methods for reinforced concrete frame structures. It deals with the experimental behavior of retrofitted reinforced concrete column elements and beam-column joint subassemblages under reversed cyclic lateral loading. A seismic retrofit/rehabilitation redesign methodology was developed, and validated in the present experimental study. Part II describes the application of this method to a one-third scale model building. In the report two column specimens, a one-way beam-column subassemblage and a two-way beam-column-slab subassemblage, all originally designed in accordance with AC1-318 for gravity loads only (1.4D + 1.7L), were retrofitted and tested at increasing drift amplitudes. The original specimens possessed relatively weak columns with respect to the adjacent beam strength. Comparisons are made between the displacement response of the original/as-built specimen tests and the present retrofitted test results. Conclusions are drawn on the efficacy of the retrofit schemes and the failure mechanisms observed.
Keywords
; Dynamic response; Ground motion; Dynamic structural analysis; Earthquake resistant structures; Earthquake engineering; Loads (Forces); Structural design; Reinforced concrete; Seismic effects; Elastic analysis; Concrete structures; Framed structures; Seismic waves