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JOURNAL OF MATERIALS,CONCRETE STRUCTURES AND PAVEMENTS
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STUDY ON SHEAR FAILURE AND REPAIR METHOD OF REINFORCED CONCRETE BEAM
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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 1/3-scale model specimens of rigid-frame viaduct mid-height beams are obtained experimntally, 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 effect are investigated. As a result, it is confirmed that member yielding load, resistance, deformation performance, etc., are not less than those of the original member if repaired properly by injecting epoxy resin in cracked parts.
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