Experimental Study of The Structural Behavior of Non-Prismatic Reinforced Concrete Frame Using Different Types of Concrete Under Static and Repeated Load

Abstract

Abstract This paper experimentally investigates the behavior of a non-prismatic concrete frame using different types of concrete under static and repeated loads. The parametric study includes changing the type of concrete (conventional concrete, steel fiber reactive powder concrete (SF-RPC), and glass fiber reactive powder concrete (GF-RPC)), and loading type (static and repeated). The results were presented and discussed the effect of SF-RPC and GF-RPC on frame behavior, and compared with the conventional concrete frame through the first crack load, ultimate load and failure mode, load-deflection curve, and the frame deflected shape. There were evidences of improvement in the frame properties, where a change in the failure mode, an increase in the ultimate load, as well as an increase in the stiffness of the frame in all the types of loading. The ultimate static load increased by 45.9% and 40.5% for SF-RPC and GF-RPC frames, respectively. Using RPC improves fatigue resistance, as the ultimate load decreases by only 2% under the influence of repeated load. In comparison, the conventional concrete frame decreases by 27%. The use of RPC in the specimens improves the shear strength and stiffness of the frame. The RPC is environmentally friendly through the use of recycled materials in mixtures (silica fume, steel fiber, and glass fiber), and also the structural sections are small thus the gases emitted (CO2) are few. As well as eliminating the need to consume new materials and impede construction for the public, because of the extension of the structural life.