International Institute of Earthquake Engineering and Seismology

By:S. Moghadam. A, J. Mokari R.

Abstract

Nowadays, natural resources, in particular those which are used to build industrial, Commercial and residential projects are on the decline. In this regard one of the most important challenges in front of the researchers and engineers is to conserve, update and enhancement of the constructed facilities and buildings Therefore, current research addresses the seismic performance of reinforced concrete columns with insufficient confinement. Confinement is one of the most effective parameters enhancing ductility of reinforced concrete structures. Confinement increases maximum compressive strength and considerably enhances compressive failure strain. In this study, RC columns with insufficient confinement are assessed, and confined columns using steel jackets with and without temperature post-tensioning have been investigated experimentally. Some tests have been carried out on scaled specimens to obtain information about compressive behavior of confined concrete with steel jacket. An equation has been developed for confined compressive strength. Results from this equation are highly in agreement with experimental results.

Keywords:

experimental results, RC columns, steel jacket, insufficient