摘要
为了研究新型自复位桥墩(rocking self-centering,RSC)在双向地震作用下的地震反应,基于OpenSees建立了RSC桥墩有限元模型,以墩顶最大漂移率、预应力筋最大应力、墩底剪力作为分析对象,对比分析了不同耗能钢筋配筋率、不同轴压比的RSC桥墩在单向和双向地震作用下的反应.结果表明,墩顶最大漂移率和预应力钢筋最大应力随着耗能钢筋配筋率的增加而减少,但耗能钢筋配筋率的增加会增大墩底剪力.
To study the seismic response of the rocking self-centering(RSC)bridge piers underbidirectional earthquake ground motions,a series of numerical analysis models for the piers were built based on the OpenSees.Taking the maximum drift rate of pier top,the maximum stress of prestressing steel bar and the shear force at pier bottom as the analysis objects,the responses of RSC piers with different reinforcement ratios of energy dissipating steel bar and different axial compression ratios under unidirectional and bidirectional earthquake are compared and analyzed.The results show that the maximum drift rate of pier top and the maximum stress of pre-stressed steel bar decrease with the increase of the reinforcement ratio of energy-dissipating steel bar,but the increase of the reinforcement ratio of energy-dissipating steel bar will increase the shear force at pier bottom.The results show that the maximum drift rate of pier top and the maximum stress of pre-stressed steel bar decrease with the increase of the reinforcement ratio of energy-dissipating steel bar,but the increase of the reinforcement ratio of energy-dissipating steel bar will increase the shear force at pier bottom.
作者
刘蔚
胡兆同
LIU Wei;HU Zhaotong(School of Highway,Chang'an University,Xi'an 710064,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2019年第6期519-524,共6页
Journal of Shenyang University：Natural Science
关键词
桥梁抗震
自复位桥墩
双向地震
轴压比
耗能钢筋配筋率
seismic resistance of bridge
self-centering pier
bidirectional earthquake
axial compression ratio
reinforcement ratio of energy-dissipating steel bar
