Taufiq Rochman, Bambang Irawan, Suhariyanto, Muhammad Fauzan Aziz
This study introduces a novel approach to enhancing seismic resilience through the displacement response of partially precast vinyl ester polymer concrete (VEPC) in semi-rigid column-pile cap joint connections under cyclic loading. By comparing VEPC connections of varying joint heights with conventional reinforced concrete (RC), the research highlights the superior performance of VEPC in seismic conditions. The optimized VEPC composition, incorporating vinyl ester resin, catalysts, fly ash, and iron sand, yields a material with significantly higher compressive strength and lower density than traditional concrete. Hysteresis loops from cyclic quasi-static lateral loading tests revealed that VEPC connections exhibited exceptional ductility, achieving greater drift ratios and deflections than RC counterparts. These connections transition seamlessly from elastic to plastic behavior, forming plastic hinges that effectively absorbed seismic energy, minimizing brittle failure and cracking. The optimal joint height balanced strength and ductility, making VEPC ideal for earthquake-prone regions. The low-viscosity VEPC enabled efficient precast construction, streamlining assembly while integrating sustainable fly ash to reduce environmental impact. This innovative semi-rigid system outperformed conventional RC in load-carrying capacity and deformation tolerance, offering a groundbreaking solution for seismic design. By fostering ductile, high-strength joints, VEPC paved the way for performance-based engineering, redefining structural connections to withstand cyclic loads with enhanced resilience. This advancement promises safer, more sustainable infrastructure, revolutionizing design practices in seismically vulnerable areas by prioritizing flexibility and durability. © The Author(s) 2025.
Civil Engineering Department, State Polytechnic of Malang, Malang, Indonesia; Mechanical Engineering Department, State Polytechnic of Malang, Malang, Indonesia; Construction Engineering and Management of Civil Engineering Department, State Polytechnic of Malang, Malang, Indonesia