摘要
结合预应力混凝土桥梁结构的施工过程,采用按龄期调整的有效弹性模量法和有限元步进法结合实例对客运专线预应力混凝土桥梁结构的长期变形进行了仿真分析研究。通过跟踪模拟桥梁在整个施工及投入运营后各个时刻的结构变形,可以确定桥上无砟轨道的合理铺设时间,满足客运专线对轨道结构的高平顺性要求。
With the construction course of a pre-stressed concrete bridge as a practical example, the longterm deformation of prestressed concrete bridges of the passengers-oriented railway is simulated and analysed by the age-adjusted effective modulus method and progressive finite element method in the paper. By following the deformations of bridges at any period of time during the whole construction sequence and in the course of it being used, the reasonable time for laying the ballastless tracks on bridges can be determined so as to meet the requirements in high speed, steadiness and smoothness for passengers-oriented railways.
出处
《国防交通工程与技术》
2009年第2期17-19,共3页
Traffic Engineering and Technology for National Defence
关键词
预应力混凝土桥梁
变形
仿真分析
无砟轨道
pre-stressed concrete bridge
deformation
simulation analysis
non-ballast track
