某景观桥梁设计中钢拱肋稳定性研究

Study on Stability of Steel Arch Rib in Design of a Landscape Bridge

摘要:

近年来，随着国家经济高速发展，景观桥梁逐渐进入大众的视野，并受到人们的喜爱。某景观桥主桥采用（70+100+140+ 200+140+100+70）m的双层七跨钢箱连拱方案。拱轴线采用样条曲线，拱肋断面采用六边形变高度截面，且钢拱肋之间横向联系较少，稳定性问题成为设计的关注重点。结合现行公路桥梁规范，给出按不同规范执行的钢拱肋稳定性分析流程，并对验算结果进行对比分析，为以后相似工程提供经验与参考。

Abstract:

With the rapid development of our national economy in recent years, the landscape bridges have gradually entered the public eyes and are favored by the people. The main bridge of a landscape bridge is a double-layer seven-span steel box continuous arch bridge of (70+100+140+200+140+100+70) m. Its arch axis is the spline curve, and the section of arch rib is a hexagon variable height section. The transverse connection between the steel arch ribs is less, so the stability problem becomes the focus of attention in the design. Now taking this bridge as an example and combined with the current highway bridge specifications, the stability analysis flow of steel arch rib according to different specifications is given, and the checking results are compared and analyzed in order to provide the experience and reference for similar projects.