evaluation of seismic retrofit of reinfirced concrete structures , Part II - Experime

[david-smith]

evaluation of seismic retrofit of reinfirced concrete structures , Part II - Experimental Performance and Analytical Study of a Retrofitted Structural Model

Author: J.M. Bracci, A.M. Reinhorn and J.B. Mander | Size: 6.88 MB | Format: PDF | Quality: Scanner | Publisher: NCEER | Year: 1992 | pages: 192 | ISBN: Technical Report NCEER-92-0031

ABSTRACT
This report is Part II of a two part series on the evaluation ofseismic 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. Part I
describes the evaluation of individual components retrofitted and tested with cyclic loading,
thar provided the base for modeling of the entire structure presented in this report.
In this report the evaluation of three retrofit techniques, i.e., concrete jacketing method, masonry
jacketing method, and partial frame masonry inf1ll, is presented based on an analytical study of
retrofitting a typical lightly reinforced frame designed according to ACI 318-89 only for gravity
loads (I.4D + L7L).
The jacketing technique is further evaluated based on an experimental and analytical study using
a 1:3 scale structural model subjected to simulated earthquake motion supplied by the seismic
simulator (shaking table) at SUNY/Buffalo.
The (jacketing) technique was applied only to selective portions of the structure, and it achieved
the limited improvement of strength and damage control as required in moderate seismicity
areas and as anticipated. This selected retrofit required only minimal structural interference
and may prove to be economically attractive.
The analytical modeling, based on component infonnation (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 infonnation is available for the components.
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General TABLE OF CONTENTS
INTRODUCTION.
RETROFIT OF GLD RIC FRAME STRUCTURES.
EXPERIMENTAL STUDY OF RETROFITTED R/C MODEL.
PERFORMANCE OF RETROFITTED R/C MODEL DURING
EARTHQUAKES.
CONCLUDING REMARKS.

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