【摘要】 采用双直线钢筋模型和Kent-R.Park混凝土模型,研究预应力度对预应力混凝土桥墩抗震性能的影响,模拟得到墩底塑性铰特性.通过设置不同的预应力钢束,改变桥墩预应力度,分析得到对应的墩底塑性铰的弯矩-曲率滞回曲线.结果表明,预应力混凝土桥墩比普通钢筋混凝土桥墩,具有极限弯矩大,耗能能力强的特点.在混凝土抗压强度范围内,随着桥墩预应力度的增加,桥墩的极限弯矩增大,耗能能力增强.更多还原

【Abstract】 The effect of prestressed degree on seismic performance of prestressed concrete pier is studied.The plastic hinge properties is gotten by means of reinforce bilinear model and concrete Kent-R.Park model.The plastic hinge hysteresisloop is obtained by setting kinds of prestressing tendons.The result of analysis indicates that the prestressed concrete pier can bear larger limit moment and more large dissipation energy ability than common concrete pier.Within the limit of concrete crushing strength,with the increase of prestressed degree,its relative limit moment of the prestressed concrete pier rises,and dissipation energy ability rises.更多还原