低预应力钢带箍加固RC柱的抗震性能数值模拟与参数分析

Numerical simulation and parameter analysis of circular RC columns with pre-tension steel hoops

基于Mander约束混凝土材料本构关系模型,采用OpenSees软件对低预应力钢带箍加固RC柱抗震性能进行数值模拟。通过与试验结果对比分析表明,模型可以较好的模拟试验结果,进而应用本模型分析加固构件尺寸、轴压比和钢带箍间距等参数对被加固构件抗震性能的影响,研究结果表明:低预应力钢带箍可以加固足尺构件,但构件尺寸、轴压比、钢带箍间距的增加将减小低预应力钢带箍的加固效果。

Based on the Mender model.The seismic performance of columns with pre-tension steel hoops can be analyzed by OpenSees.The comparison between the numerical simulation results and the experimental results shows that this analysis model can accurately simulate the experimental results.Furthermore,the effects of sizes,axial load ratios and spacing of steel hoops on seismic performance of specimens are analyzed based on this analysis model.Finally,the numerical simulation results show that the full-size specimens can be retrofitted by pre-tension steel hoops,whereas,the enhanced effect of pre-tension steel hoops will be decreased with the increase of size,axial load ratios and spacing of steel hoops.