大跨度悬索桥钢箱梁吊控制分析

The Installation Analysis for the Steel Box Girder of Long Span Suspension

大跨径悬索桥钢箱梁节段吊装是主梁施工的关键工序,吊装过程中结构的内力和变形变化显著,吊装方案不合理会在加劲梁节点处产生较大次应力,降低结构安全储备。论文以重庆寸滩长江大桥为工程背景,主要研究在钢箱梁吊装施工过程中线形变化及各相邻钢箱梁截面之间开口距离的变化规律,为钢箱梁的合理吊装施工提供依据。

Long-span suspension bridge stiffening girder segment segment hoisting is the key in the process of construction of main girder, lifting structure internal force and deformation of significant change, lifting scheme unreasonable large secondary stress is generated in the stiffening girder nodes and reduce the structural safety reserve.By way of example of Chongqing Cuntan River Bridge, main research on the stiffening girder hoisting linear changes in the construction process and the adjacent stiffening girder section openings between the distance variation, stiffening girder reasonable hoisting construction, provides the basis for.