Influence of precast concrete joints on the ductility of beam elements

Abstract

This study aims to determine the effect of precast concrete joints on the resulting ductility. The research method was experimentally in a laboratory-based on ASTM (American Society for Testing and Materials) and ACI (American Concrete Institute). The design of concrete compressive strength was 14.50 MPa. The specimen used in this research consist of four beams, which are TRC (Top Reinforcement Concrete), THB (Top Hollow Block), BRC (Bottom Reinforcement Concrete), and BHB (Bottom Hollow Block). The size of beam used was 15 × 20 × 210 cm with the diameter of reinforcement bar were 12 mm (threaded steel) and 10 mm meanwhile the diameter of plain steel was 6 mm. The result showed that the ductility of TRC beam was 2.024, the ductility of THB beam was 2.526, the ductility of BRC beam was 1.237, and the ductility of BHB beam was 1.611. The ductility for hollow block is greater than normal reinforced concrete beam. Meanwhile, the load that occurs for hollow blocks is smaller.