摘要
以连续梁受力与支座标高调整的关系为指导,对包含预拱度制作线形的钢箱梁顶推过程中可能出现的支座脱空问题进行研究。以主梁不动、改变临时墩支撑位置的方法模拟钢箱梁的顶推,程序自动判断支座顶与无应力状态下钢箱梁底板的距离,分别采用接触单元法和强制位移法模拟临时墩的支撑;比较而言,强制位移法计算速度快,为临时墩支座标高的优化所需要的大量计算提供了快速的算法。据此采用ANSYS程序的APDL语言,对某桥钢箱梁的顶推过程临时墩支座标高调整进行了模拟计算,得出"预拱度曲线上凸点经过处支座标高上调,反之下调"的基本优化原则,给出了支座标高优化调整方案。
Guided by the relationship between the force conditions of continuous girder and the elevation adjustment of bearings,the problem of detaching of bearings from girder that may occur in the incremental launching erection of the steel box girder with manufactured camber alignment is studied.The method of keeping the position of the box girder unchanged and changing the supporting positions of temporary piers is used to simulate the incremental launching erection of the girder and the computer program will aut...
出处
《世界桥梁》
北大核心
2010年第3期70-73,共4页
World Bridges
关键词
自锚式悬索桥
钢箱梁
顶推法架桥
算法
优化
self-anchored suspension bridge
steel box girder
incremental launching erection
algorithm
optimization
