損傷を受けたRC梁部材の地震応答特性

Abstract

Damaged RC members are often repaired and reused after earthquakes. Butthere is some risk that damaged structures are left unrepaired if damage is not soserious. This paper shows seismic behavior of damaged RC members using hybrid(pseudo-dynamic) testing method. Obtained hysteretic loops of the damagedspecimens were quite different from those of new specimens even if the previousbehavior of damaged ones had been almost eiastic. Repaired RC members were alsoused in the hybrid loading tests and cut after the tests to see the damagedsegments. New cracks were found in unrepaired region and the numbers of themwere less than those of old cracks which had been made before repair works.Analytical method to estimate seismic behavior of repaired specimens are alsodiscussed in this paper.