双柱排架变截面桥墩抗震行为分析  

A Seismic Behavior Analysis of Pier with Double-framed Variable Cross-section

作　　者：贺鹏[1,2] 尹俊红[3] 宋一凡[2] 

机构地区：[1]中交第一公路勘察设计研究院有限公司第六交通设计院,西安市710075 [2]长安大学公路学院,西安市710064 [3]西安建筑科技大学土木工程学院,西安市710055

出　　处：《公路》2017年第2期77-82,共6页Highway

基　　金：国家自然科学基金项目;项目编号51078306;51408453

摘　　要：以某高速公路项目为依托,针对变截面双柱排架墩进行抗震行为研究。结合混凝土用量及配筋原则,分别选取墩高相同的变截面双柱排架墩和等截面双柱排架墩进行Pushover分析。采用强度及位移延性两种指标对两种桥墩的抗震性能进行比较,并对不同高度变截面桥墩的抗震行为进行评价。此外还研究了中系梁布设位置及刚度变化对变截面双柱排架墩抗震行为的影响,并根据分析结果提出桥墩中系梁布设原则,对桥墩抗震设计具有一定的指导意义。Seismic behavior analysis for variable cross--section double-framed pier is researched based on certain highway project. Variable and uniform cross-section double-framed piers which have the same heights, concrete volume and reinforcement principles are selected respectively to be used in Pushover analysis. The seismic performance of the two framed bents is compared by strength index and displacement ductility coefficient index, and seismic behavior is evaluated by different heights of variable cross-section double-framed bent. In addition how position setting and rigid of pier tie beams effect seismic behavior of variable cross-section double-framed bent is researched and design principles is proposed according to analysis results which have a significance of guidance to improve the level of pier seismic design.

关 键 词：变截面双柱排架墩 PUSHOVER分析 抗震性能 中系梁 位移延性系数 强度 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]