Influence Of Partial Prestressing Ratio On Hysteretic Behavior Of Beam-Column Subassemblage Using Reactive Powder Concrete Materials

Abstract— In the Indonesian and American codes of reinforced concrete design (SNI 2847:2013 and ACI 318-14, respectively) the Partial Prestressing Ratio (PPR) of a structure element is limited by 25 percent to prevent brittle behavior. Reactive Powder Concrete (RPC) materials provide high compression strength and ductility. The using of RPC allows increasing of PPR. Thus, the RPC structures provide higher nominal moment and ductility than normal concrete structures. The aim of this research was to examine the influence of PPR that exceeds 25 percent on partially pre-stressed beam-column joint sub-assemblages using RPC materials (PPRPC) to their performance. Three PPRPC specimens with PPR of 22.78 and 33.79 percent were tested according to ACI 374.1-05 loading set up. Furthermore, the finite element models of PPRPC were verified with the experiment results and also reinforced using PPR ranging from 22.78 to 41.12 percent. The results showed that the model using a PPR of 33.79 percent provided the optimum performance in terms of highest energy dissipation and ductility ranged from 11.32 to 13.46. It showed that PPRPC using RPC materials provided high performance despite the PPR level exceeds the allowed 25 percent and were suitable for structures in strong earthquake zones.