拉索开口薄壁箱拱平面外稳定分析

Research on Lateral Stability of Arch Bridges with Open Thin-walled Boxes and Cables

针对开口薄壁箱轻型化转体拱桥施工中的结构稳定问题,使用能量方法研究了带拉索的悬链线开口薄壁箱拱在竖向非均布荷载的作用下的平面外稳定计算方法,提出了临界荷载的计算公式。对一座转体拱桥实际施工进行了二期混凝土加载过程中的面外稳定核算。结果表明,施工满足稳定安全要求。

To solve the stability of open thin-walled boxes light-rization turning arch bridge in construction, the outside-flat stability calculation method of catenary arch bridge with open thin-walled boxes and cables under the inhomogeneous load was researched by using energy method, The formula for calculating the stability of structure under critical load was brought forward. With an application example, the stabilize assurance coefficient at the second step of concrete casting was calculated. The calculation results showed that the safety was satisfied.