Experimental Response of Precast Infill Panel Connections and Panels Made with DFRCC

Abstract

This paper describes the results of an experimental investigation of an infill system that utilizes precast ductile fiber reinforced cementitious composite (DFRCC) panels in lieu of traditional materials. The system is intended for use as a retrofit strategy in steel framed hospital structures. Bolted connections are utilized both between individual panels and to the frames, allowing the system to be moved or altered in the event of changes in facility use. Results from laboratory tests of panel connections and panels are presented. The connection tests studied the effect of bolt orientation with respect to applied load, the effect of the DFRCC surface condition within the connection, and time-dependent bolt tension loss. The connection tests demonstrated the viability and the capacity of the proposed connections. DFRCC panels were tested to evaluate the cyclic load-displacement response and energy dissipation in the panels with various panel geometries, panel reinforcements and DFRCC materials. The panel tests also demonstrated the viability of the connection system used. Selected panel test results are presented here, indicating the variation in stiffness and energy dissipation possible with different panel reinforcement.