Title:
Shear Failure of Reinforced Concrete Beams and Effect of Repair by Epoxy Resin Injection
Author(s):
Y. Ozaka and M. Suzuki
Publication:
Symposium Paper
Volume:
93
Issue:
Appears on pages(s):
637-670
Keywords:
beams (supports); damage; ductility; earthquakes;
epoxy resins; failure; reinforced concrete; repairs; shear
properties; viaducts
DOI:
10.14359/6322
Date:
9/1/1986
Abstract:
Reinforced Concrete viaducts of the Tohoku Shinkansen suffered considerable damage especially in mid-height beams due to the Miyagi-ken-oki Earthquake (1978), and there were quite a number that would not have been able to withstand normal use without remedy. In this study the strength-deformation characteristics of 1/2- or l/3-scale model specimens of rigid-frame viaduct mid-height beams are obtained experimentally, and the bending shear characteristics of mid-height beams are examined. Further, various repair methods are applied to specimens loaded to different levels with crack width or displacement as the yardstick, and the effects are investigated. As a result, it is confirmed that member yielding load, resisting capacity, deformability, etc., are not less than those of the original member if repairs are made properly by injecting epoxy resin in cracked parts.