考虑竖向地震力作用下桥墩的响应分析  

Response Analysis of Piers Considering Vertical Earthquake Ground Motion

作　　者：李洋[1] 何超[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《现代交通技术》2015年第2期32-35,共4页Modern Transportation Technology

摘　　要：为了研究竖向地震力作用对钢筋混凝土桥墩时程响应的影响,利用有限元软件Open Sees对不同地震波、长细比及轴压比情况下考虑竖向地震力前后的钢筋混凝土桥墩进行时程分析。对比各个工况下桥墩的时程响应,结果表明:竖向地震力作用对桥墩的时程响应有较大影响。因此在对钢筋混凝土桥墩进行抗震分析时,建议考虑竖向地震力作用。In order to study the effect of vertical earthquake ground motion on time history response of reinforced concrete bridge piers, time history analyses are performed on several conditions, which include only horizontal earthquake ground motion works and horizontal and vertical earthquake ground motion work together on different seismic waves, slenderness ratios and axial compression ratios, using the finite element software OpenSees. Comparing the results of time history response of the bridge pier on these conditions, conclusion can be got that vertical earthquake ground motion has great effect on the time history response of the piers. It is therefore suggested that vertical earthquake ground motion should be considered in the seismic analysis of reinforced concrete bridge piers.

关 键 词：竖向地震力 时程分析 钢筋混凝土桥墩 纤维截面 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]