Load Deflection Experiment

Load deflection behavior

The test results of Ultimate load and deflection are given in Table 4. It shows that the addition of fibers into the concrete increased the load carrying capacity and deflection at ultimate load. HSBC1 and HSBC2 specimens’ ultimate load is 24 kN the same value was obtained for the Hybrid fiber reinforced high strength concrete specimen – HYFBC2.1. The graphs are shown in Figure 6. When the beam is subjected to cyclic loading, the graphs are shown in Figure 7. The energy absorption capacity was calculated as the area under the hysteresis loop of the load deflection diagrams. The cumulative energy absorption capacity of the beam-column joint was obtained by adding the energy absorption capacity of the joint during each cycle considered. In this study total energy absorption capacity was calculated from the each cycle Peak load verses deflection curve.

4.2 First crack and ultimate load

All the specimens were initiated the crack at beam column junction after the first crack load, further increase of load the cracks started to widen and developed in upward direction of beam. Small minor cracks can be visible in the control specimens

The energy absorption capacity of hybrid fiber reinforced high strength concrete non –seismic detailing specimens increased with increase in fiber volume fractions. HYBC2.1 specimen - energy absorption capacity was 257.96kN-mm. It was 23.65 percent more than the energy absorption capacity of HSBC1 specimen. The term Ductility [17] is defined as the ability of structure to undergo large amount of deformations without reduction of its strength. Deflection ductility was calculated by using peak load deflection curves. Deflection ductility of Hybrid fiber reinforced high strength concrete specimen HYBC2.1 is more than the control