钢筋套筒挤压连接的预制RC柱抗震性能试验研究

为研究纵筋套筒挤压连接的预制柱抗震性能，完成了7个配箍特征值0.15~0.187、轴压比0.65~0.80、截面尺寸500 mm×500 mm的钢筋混凝土预制柱试件及1个用于对比的现浇柱试件的拟静力试验。结果表明，套筒挤压连接能够有效传递钢筋的拉、压力，预制柱试件与现浇柱试件的破坏过程、破坏形态基本相同，预制柱试件的水平力-位移滞回曲线饱满，偏心受压承载力试验值为计算值的1.26倍~1.42倍，极限位移角为1/42~1/26，抗震性能满足规范要求。套筒挤压连接可用于抗震设计的钢筋混凝土柱的纵向钢筋连接。

EXPERIMENTAL RESEARCH ON SEISMIC BEHAVIOR OF PRECAST RC COLUMNS WITH STEEL BARS SPLICED BY COMPRESSIVE SLEEVES

To study the seismic behavior of precast reinforced concrete columns with longitudinal reinforcement spliced by compressive sleeves, quasi-static tests of eight columns of 500 mm×500 mm cross section were conducted. Among them, seven were precast columns with characteristic stirrup ratios from 0.15 to 0.187 and axial load ratios from 0.65 to 0.80, whereas one was a cast-in-place column. The test results indicate that the compressive sleeve connectors could effectively transfer the tensile and compressive force of steel bars. The failure process and failure mode of the precast columns were similar to those of the cast-in-place column. The lateral load-displacement hysteretic loops of the precast columns were plump. The experimental eccentrically compressive strength was 1.26~1.42 times the calculated value. The ultimate drift ratios ranged from 1/42 to 1/26. The compressive sleeve connector can be used to connect longitudinal reinforcement in precast reinforced concrete columns designed to resist seismic actions.