Experimental Research of Progressive Collapse Resistance of RC Frame Structure

Abstract

In order to further study the reinforced concrete frame structure against the continuous collapse of the force mechanism, a 2 × 2 single-layer reinforced concrete frame model was designed and manufactured. The quasi-static test method was adopted to exert the external effect on the reinforced concrete frame structure with the failure angle column through the hydraulic jack. By using the force and displacement mixed control method, structural continuous collapse process was simulated. The failure process of the corner column and the development of the plastic hinge formation were observed, and the data of frame resistance, structural displacement, steel strain and concrete strain were collected. According to the experimental data and phenomena, the structure resistance - displacement curve, the order, quantity and collapse mechanism of the plastic hinge were analyzed. It can be seen that the frame undergone the elastic phase, the plastic phase and the failure failure stage in the failure process of the corner column failure. It is also known that the frame structure provides the anti-continuous collapse ability through the failure bearing capacity of the frame beam. Moreover, a simple plasticity method for the collapse of the frame was obtained.