ABSTRACT
Abstract A new approach for seismic retrofitting of URM structures is presented where a fiber composite fabric is epoxy bonded to the wall. Results indicate that both flexural and shear strength of the wall as well as its ductility is significantly enhanced. Following the January 17, 1994 Northridge earthquake, this technique was applied to two buildings in southern California. The technique, proved to be the most cost-effective alternative to repair both of these damaged buildings. In this paper, some of the laboratory test results are presented and the strengthening of one of the buildings is discussed. Concrete, Ductility, Earthquakes, Masonry, Rehabilitation, Repair, Strengthening
1 Introduction
Various methods for strengthening Unreinforced Masonry (URM) walls have been studied in recent years. These usually require the addition of framing elements to reduce the loads on the walls, or surface treatments such as shotcrete or gunite to increase the strength and ductility of the walls. Such retrofits often add significant mass to the structure and are time-consuming and costly to perform. The addition of the mass will increase the earthquake-induced inertia forces and may require strengthening of the footings as well.
