焊接环式箍筋约束高强混凝土柱抗震性能研究

通过室内模型低周往复加载试验及非线性有限元分析,对焊接环式箍筋约束高强混凝土柱的抗震性能进行了研究.研究了轴压比、配箍率两个参数对柱抗震性能的影响规律.结果表明:通过ABAQUS软件对焊接环式箍筋约束高强混凝土柱的有限元分析结果与试验结果符合较好;随着轴压比的提高,柱的水平承载力变大,延性和耗能能力变差,骨架曲线的强度...

Aseismic performance of high strength concrete columns confined by welded hoop stirrups

The aseismic performance of high-strength concrete columns confined by welded hoop stirrups was studied by means of indoor model low cycle cyclic loading tests and nonlinear finite element analysis.The effect laws of axial compression ratio and stirrup ratio on aseismic performance of columns were studied.The results showed that the finite element computation results of the concrete columns using the software ABAQUS agree well with test ones;with increase in axial compression ratio,the horizontal load-bearing ability of columns increases,their ductility and energy-dissipating capacity decrease,the strength decline segment of skeleton curve is steeper;with increase in volume stirrup ratio,load-bearing ability,ductility and energy-dissipating capacity of columns all increase;through regression analysis,the formula for shear-bearing capacity of high-strength concrete columns confined by welded hoop stirrups is obtained,it can be used as a reference for design.