中文摘要：

目的研究圆柱墩延性性能的影响因素，为高烈度区圆柱墩的延性抗震设计，尤其是圆柱墩的箍筋布置、配箍率等提供参考．方法采用有限元软件ABAQUS建立圆柱墩非线性有限元模型，采用循环加载和Pushover模拟圆柱墩的破坏过程，对比箍筋布置形式及加密区与非加密区配箍率对圆柱墩延性性能的影响．结果在相同受力条件下，采用螺旋箍筋比圆形箍筋的圆柱墩屈服时间推迟、位移延性系数增大、耗能能力增加，因此圆柱墩采用螺旋箍筋在抗震性能上更有优势．圆柱墩箍筋加密区与非加密区配箍率对墩的延性性能均有影响，但加密区配箍率对其延性性能与耗能能力的影响远比非加密区配箍率显著．结论对圆柱墩进行抗震设计时宜采用螺旋箍筋，同时要重视加密区箍筋的设计．

英文摘要：

The influence factors of ductility of cylindrical piers are studied, which can provide ref- erence for the ductility seismic design of cylindrical piers in high seismic intensity area, especially for stirrup form and stirrup ratio of cylindrical piers. Nonlinear FE models of cylindrical bridge piers were established using ABAQUS. Failure process of cylindrical bridge piers were simulated using Pushover and cyclic loading. Influence of stirrup form and stirrup ratio in densification area or normal area on ductility performance of circular bridge columns was comparative analyzed. Nu- merical results show that：In the same condition, yield time of cylindrical piers with spiral stirrups was later than these with circular stirrups. Displacement ductility coefficient and energy dissipation capacity of cylindrical piers with spiral stirrups were larger, so stirrup ratio has more seismic ad- vantages than circle stirrup especially with small axial compression ratio. Stirrup ratio has important influence on the ductility of cylindrical piers. But stirrup ratio in cylindrical piers densification area has greater influence on ductility performance and energy dissipation than normal area. Spiral stir- rups should be used for the seismic design of the cylindrical piers, and the design of stirrups in the encrvotion zone should be paid more attention.