摘要
为研究同步合龙方案对刚构桥成桥后线形及应力的影响,以叙古高速公路某高墩大跨连续刚构桥为工程依托,采用有限元软件,建立同步合龙方案和原设计合龙方案2种有限元仿真模型。以消除混凝土收缩徐变和合龙温差引起墩顶水平位移为控制原则,合理确定顶推力。将2种合龙方案在成桥时和成桥10 a后的主梁竖向位移、应力及主墩内力进行了对比。研究结果表明:边、中跨同步合龙方案对该高墩大跨连续刚构桥成桥线形及应力的影响较小。
In order to study the influence of synchronous closure scheme on the alignment and stress of the rigid frame bridge after completion, two finite element simulation models of synchronous closure scheme and original design closure scheme are established by finite element software, based on a long-span continuous rigid frame bridge with high piers on Xugu Expressway, in order to eliminate the piers caused by shrinkage and creep of concrete and temperature difference of closure. The top horizontal displacement is the control principle, and the top thrust is reasonably determined. The vertical displacement, stress and internal force of the main girder of the bridge after the completion of the two closure schemes and after the10-year completion of the bridge are compared. The results show that the side-to-middle span synchronous closure scheme has little influence on the alignment and stress of the bridge.
作者
徐鹏
王达
程东亚
XU Peng;WANG Da;CHENG Dong-ya(School of Civil Engineering,Changsha University of Science & Technology,Changsha 410114,China;Key Laboratory of “Bridge Engineering Safety Control”,Built by Hunan Province and Ministry of Education, Changsha 410114,China)
出处
《交通科学与工程》
2019年第2期69-74,共6页
Journal of Transport Science and Engineering
基金
国家自然科学基金资助项目(51878072)
关键词
桥梁工程
连续刚构桥
同步合龙
顶推
位移
应力
bridge engineering
continuous rigid frame bridge
synchronous closure
jacking
displacement
stress
