摘要
以西部山区某高墩预应力连续刚构桥作为研究对象,通过分离式桥墩间横系梁设置以及墩高参数分析,进行桥梁动力特性、静风作用下的静位移及脉动风作用下抖振响应研究。结果表明,桥墩横梁的数量和位置对低阶侧弯频率影响较大,随着墩高的增加,各主要振型对应的振动频率都在下降。在横桥向静风荷载作用下,桥墩横梁的数量、位置及墩高对桥梁横向位移影响较大,墩横梁数量越多及位置越高横桥向位移越小,随墩高的增加墩顶横向位移明显增大。随着墩横梁的数量增加和位置的提高,抖振位移响应逐渐减小。
Taking a prestressed concrete continuous rigid frame bridge with high-rise piers as the research object, by locating the tie beams between the separating piers and analysing the height of piers, we studied the bridge dynamic characteristic, static wind displacement and buffeting response under fluctuating wind. The result shows that （ 1 ） The number and location of tie beam have great influence on low-order lateral bending frequency, and the vibration frequencies corresponding to the major modes decline with the increase of pier height. （2） Under the transverse static wind loads, the number, location and pier height have great impact on the bridge lateral displacement. The more tie beam is and the higher the tie beam is, the smaller the lateral displacement is. Pier top lateral displacement greatly increases with the increase of pier height. （3） With the increase of tie beam number and the rise of tie beam position, buffeting displacement response gradually reduces.
出处
《公路交通科技》
CAS
CSCD
北大核心
2016年第3期76-81,共6页
Journal of Highway and Transportation Research and Development
基金
国家科技支撑计划项目(2014BAB16B05)
同济大学青年英才计划项目(201469)
关键词
桥梁工程
连续刚构桥
有限元模拟
横系梁
抗风性能
高墩
bridge engineering
continuous rigid frame bridge
finite element simulation
tie beam
wind resistance performance
high-rise pier
