分阶段施工桥梁的无应力状态控制法

Unstressed State Control Method for Bridges Constructed in Stages

利用能量法建立分阶段施工桥梁结构的力学平衡方程,引入构件单元的无应力状态量建立分阶段施工桥梁结构过程状态与过程状态、过程状态与成桥状态之间的联系。安装计算时通过无应力状态量直接解算施工中间状态的内力和位移,在分阶段施工桥梁施工过程中实现了多工序并行作业和温度、临时荷载影响的自动过滤。

The energy method is used to set up the mechanical equilibrium equations for bridge structures constructed in stages and the unstressed state amount of structural elements is introduced to establish the relations between the process state and process state, and between the process state and completion state of the bridge structures. At the time of calculation for erection, the internal force and displacement in the interim state of construction are directly calculated by means of the unstressed state amount and the parallel operation of multiple working procedures and the automatic filtration of influences from temperatures and temporary load can be therefore well realized in the construction process of the bridges constructed in stages.