Seismic Behavior of Reinforced Normal Strength Concrete and Reactive powder Concrete Eccentrically Loaded Frames

The purpose of this investigation is to study the effect of repeated load on reinforced concrete beam-column connections. Eight specimens were adopted in this investigation; four specimens were poured with normal strength concrete, and other four specimens were poured with reactive powder concrete. The frames dimensions are constant; 280 mm and 200mm of beam height and width respectively with 1000mm beam length and 200mm square column with 700mm height. The load was applied at mid-span and at a distance 150mm from the mid-span of beam. The reduction in frame capacity reached to 53.3% due to eccentricity. All tested specimens were failed at cycle 5 with different load level; . the decrease in stiffness of cyclically loaded frames of normal strength concrete was higher than that of reactive powder concrete frames. The deflections of cyclically loaded frames higher than that of statically loaded frames. In brief, the frames with eccentrically and cyclically loading give lowest ultimate strength, first crack load and stiffness with highest deflections.