灌浆套筒连接预制混凝土柱抗震性能分析

Seismic performance analysis of precast concrete column connected with grouting sleeve

为研究灌浆套筒连接预制混凝土柱的抗震性能,利用有限元软件ABAQUS建立了7组灌浆套筒连接预制柱模型,进行了往复荷载下的拟静力分析,讨论了轴压比、长细比和配筋率对灌浆套筒连接预制柱抗震性能的影响。结果表明:各试件延性系数均大于3,有较好的延性;当轴压比由0.3增至0.5时,滞回曲线逐渐由梭形发展为弓形,耗能能力下降,承载力增大7.2%~13.9%,刚度退化加剧;当长细比由4增至6时,试件滞回曲线的捏缩效应加剧,耗能能力下降,承载力下降了23.2%~40.4%,刚度退化加剧;当配筋率由1.24%增至1.79%时,试件的滞回曲线逐渐饱满,耗能能力提高,承载力增加了6.3%~13.8%,刚度退化趋于平缓。

In order to study the seismic performance of precast concrete column with grouting sleeve connection,seven groups of precast column models with grouted sleeve connection were established by using the finite element software ABAQUS,and the quasi-static analysis under reciprocating load was carried out.The effects of axial compression ratio,slenderness ratio and reinforcement ratio on the seismic performance of precast column with groutin sleeve connection were discussed.The results show that the ductility coefficient of each specimen is greater than 3,which has good ductility.When the axial compression ratio increases from 0.3 to 0.5,the hysteresis curve gradually develops from spindle to bow,the energy dissipation capacity decreases,the bearing capacity increases by 7.2%~13.9%,and the stiffness degradation increases.When the slenderness ratio increases from 4 to 6,the pinching effect of the hysteresis curve of the specimen increases,the energy dissipation capacity decreases,the bearing capacity decreases by 23.2%~40.4%,and the stiffness degradation increases.When the reinforcement ratio is increased from 1.24%to 1.79%,the hysteresis curve of the specimen is gradually full,the energy dissipation capacity is improved,the bearing capacity is increased by 6.3%~13.8%,and the stiffness degradation tends to be gentle.