SHAKING TABLE TESTS OF SCALED RC FRAME MODELS FOR INVESTIGATION OF VALIDITY AND APPLICABILITY OF DIFFERENT RETROFITTING TECHNIQUES

Abstract

Within the NATO Project SfP977231, three 1/3 scale models (2 story R/C frame specimens) of a 4 story R/C frame building prototype have been designed, constructed and tested on the shaking-table at the IZIIS Laboratory, Skopje, Macedonia. The main goal was to verify the validity and applicability of different seismic retrofitting techniques under the project. The first test specimen was a 3D RC frame structure with infill walls. The second specimen had additional CFRP strips applied on both faces of the infill walls using epoxy. The third specimen was retrofitted with pre-cast concrete panels epoxy glued to the wall and frame members. Several input motions with gradually increasing intensity were applied with peak ground acceleration up to 0.52g. Obtained results from the experiments showed that both retrofitting techniques (CFRP strips and pre-cast concrete panels) have significantly reduced the displacements and improve the structural behavior.