大跨度组合连续宽箱梁顶推施工过程分析

ANALYSIS OF INCREMENTAL LAUNCHING CONSTRUCTION PROCESS OF LONG-SPAN COMPOSITE CONTINUOUS WIDE BOX GIRDERS

以银川滨河黄河大桥西引桥为背景,阐述了连续组合宽箱梁的钢梁顶推架设过程,并采用有限元方法对钢梁架设过程进行了模拟,分析了顶推过程中最不利的工况,得到钢梁顶推过程中的静力及稳定特性。结果表明,采用顶推方法架设钢梁时,钢梁具有良好的静力及稳定性能。

Setting the west approach bridge of Yinchuan Yellow River bridge as background, the paper expounded the incremental launching process of steel beams of continuous composite wide box girders, and simulated the erecting process of steel beams by using finite element method and analyzed the most unfavorable load case in pushing process. The static and stability characteristics of steel beam in launching process were obtained. The results showed that the steel beams had favorable static and stability properties when they were erected by incremental launching method.