三线铁路高墩连续梁桥采用速度锁定装置的地震响应分析及应用  

Seismic Responce Analysis and Application of High Pier Continuous Beam Bridge on Three Line Railway

作　　者：姚志国 YAO Zhi-guo(Kunming Survey,Design and Research Institute Co.Ltd.of CREEC,Kunming 650201,China)

机构地区：[1]中铁二院昆明勘察设计研究院有限责任公司,昆明650201

出　　处：《工程建设与设计》2023年第4期62-64,共3页Construction & Design for Engineering

摘　　要：以大临铁路某三线车站桥主桥为研究对象,运用MIDAS进行建模,模拟了(40+2×64+40)m跨度单箱双室混凝土连续梁、支座连接、3个超高的主墩以及桩基与土体的相互作用,分析了三线铁路车站超高桥墩及支座在高烈度地震区下的受力,选取合适的阻尼系数,研究支撑体系在不同地震波作用下的受力变化情况。根据分析结果,总结出该桥在地震力作用下的桥墩受力变化规律,提出桥墩支座优化措施。Taking the main bridge of a three-line station bridge of Dali-Lincang railway as the research object,this paper uses finite element software modeling to simulate the(40+2×64+40)m-span single box double chamber concrete continuous beam,bearing connection,three super high main piers and the foundation action of pile foundation and soil,analyzes the stress of super high piers and bearings of the three-line railway continuous beam in the high intensity seismic area,and selects the appropriate damping coefficient,and study the force changes under the action of each response spectrum.According to the analysis results,the force variation law of the piers of the bridge under the action of earthquake forces is summarized,and the optimization measures of pier bearings are put forward.

关 键 词：三线铁路 高墩连续梁桥 速度锁定装置 地震响应分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]