摘要
高墩连续刚构桥作为中国西部山区桥梁的一种常见结构形式,但目前对如何控制其在地震作用下过渡墩处的墩梁相对位移缺乏研究。该文从不同相邻联周期比的情况出发,考虑过渡墩自振周期的影响,探讨山区高墩连续刚构桥的合理设计思路,和不同限位装置对位移控制的效果。参数分析结果表明:过渡墩自振周期接近相邻联振动周期时能有效减少墩梁相对位移;过渡墩处安装叠层橡胶支座和弹塑性挡块能有效限制墩梁位移;连梁装置只在特定的周期比条件下才能发挥减小位移的作用。
As a common type of structure, continuous rigid frame bridges with high piers are widely used in western China. However, methods for restraining the seismic displacement between pier and girder are rarely researched. Considering the effect of the period ratio of adjacent girders and the self-vibration period of transitional pier, a reasonable design concept of such bridges is discussed parametrically and the effect of different restrainers on controlling displacement is investigated. Results show that displacement between pier and girder is greatly reduced when the self-vibration period of transitional pier approaches that of adjacent girders; installation of laminated rubber bearings and elastic-plastic restrainers on transitional piers can effectively control the displacement between pier and girder; unseating prevention devices have the effect of reducing displacement when a specific period ratio is satisfied.
出处
《工程力学》
EI
CSCD
北大核心
2016年第1期148-156,共9页
Engineering Mechanics
基金
国家973项目(2013CB036302)
国家自然科学基金项目(51278371)
交通运输部建设科技项目(2013318800020)
关键词
山区高墩桥梁
连续刚构桥
墩梁相对位移
参数分析
限位装置
mountain bridges with high piers
continuous rigid frame bridge
displacement between pier and girder
parameter analysis
restrainers
