ABSTRACT
To study the influence of grouting sleeve defects on the seismic performance of precast concrete frame structures, a set of typical cast-in-place frames and precast frames under the condition of 8 degrees and 0.2 g were designed using the PKPM software. Seven finite element models containing defects were established using the ETABS software. The variation laws of the capacity spectrum curve, plastic hinge development, inter-story drift angle distribution, force-displacement relationship, and stiffness degradation of each model were used to study the static elastic-plastic analysis, and the influence of grouting sleeve defect rate on its seismic performance was discussed. The results show that the seismic performance of the precast frame without grouting sleeve defects can meet the requirements of equivalent cast-in-place. The defect of the grouting sleeve mainly affects the quality of the longitudinal reinforcement connection of the precast frame. With the increase in defect rate, the bearing capacity, deformation capacity, and energy dissipation capacity of the precast frame decrease obviously, and its safety reserve decreases. However, within a certain range, it still conforms to the failure mechanism of ‘strong column-weak beam’ and the performance goal of ‘no collapse-rare earthquake.’
