An investigation of intermediate moment frames constructed using precast concrete for seismic resistance in Thailand

Low-to mid-rise building construction using precast concrete structures is gaining popularity in Thailand due to their superior construction quality and shorter construction timelines. However, seismic resistance is often not considered in the design, particularly at the joints between precast members. This study investigates precast concrete (PC) beam-column-footing joints with adequate seismic resistance suitable for Thailand, aiming to streamline the construction process. Quasi-static reversed cyclic loading tests were conducted on two interior beam–column and column–footing joint specimens. The results demonstrated that the PC joints exhibited excellent hysteretic behavior, particularly in terms of load-bearing capacity and ductility, and met the acceptance criteria outlined in ACI 374.1–05, making them appropriate for use in regions with moderate seismic activity. A nonlinear fiber-based model developed using Perform 3D software was validated against the experimental data, with the predicted hysteretic response showing good agreement with the observed results.