跨座式单轨轨道梁桥抗震性能研究  

Study on Seismic Analysis of Rail Beam Bridge of Straddle Monorail Transit

作　　者：周腾 Zhou Teng(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道勘察》2021年第5期57-61,共5页Railway Investigation and Surveying

基　　金：中铁工程设计咨询集团有限公司科技开发计划课题(单轨-研2020-3-1)。

摘　　要：芜湖跨座式单轨采用以连续刚构结构形式为主的轨道梁桥,但目前对该种形式轨道梁桥的抗震性能研究尚不成熟。为研究连续刚构形式轨道梁桥的抗震性能,以常用墩高15 m、跨度3×30 m直线连续刚构轨道梁桥为例,利用MIDAS-CIVIL和SAP2000建立全桥模型,采用反应谱法对7度和8度地震烈度条件下轨道梁桥进行多遇地震分析,采用非线性时程分析方法对8度地震烈度条件下轨道梁桥进行罕遇地震分析。研究表明:(1)多遇地震作用下,7度地震工况不控制墩柱配筋,8度地震工况仅控制中墩横桥向配筋,不控制中墩纵桥向和边墩配筋;(2)8度罕遇地震作用下,边墩和中墩均进入弹塑性状态,转角变形均小于允许转角,抗震性能良好。Wuhu straddle monorail mainly adopts the continuous rigid frame type of rail beam bridge,but the research on the seismic performance of this rail beam bridge is not mature at present.In order to study on seismic performance of continuous rigid frame type of rail beam bridge,the commonly used straight continuous rigid frame of 15 m pier height and 3×30 m span is taken as an example,using MIDAS-CIVIL and SAP2000 establish the full bridge model,the response spectrum method is used to analyze low-level earthquake of rail beam bridge under the condition of 7 and 8 earthquake intensity,and nonlinear time history analysis method is used to analyze the high-level earthquake under the condition of 8 earthquake intensity.Research shows:(1)Under low-level earthquake,seismic condition do not control the reinforcement of pier in 7 earthquake intensity,seismic condition only control the horizontal reinforcement of middle pier in 8 earthquake intensity,seismic condition do not control the reinforcement of side pier and the longitudinal reinforcement of middle pier in 8 earthquake intensity;(2)Under high-level earthquake in 8 earthquake intensity,side pier and middle pier both enter the elastic-plastic state,the corner deformation is less than the allowable corner,seismic performance is well.

关 键 词：跨座式单轨 连续刚构 抗震性能 非线性时程分析 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U232[交通运输工程—道路与铁道工程]