论文部分内容阅读
以长沙营盘东路浏阳河大桥为工程背景,采用Midas/Civil软件建立了考虑导梁、顶推平台和临时墩的斜连续梁顶推仿真模型,系统研究了斜度和纵曲率对类双层斜连续箱梁顶推施工的影响。研究结果表明:斜度对箱梁应力影响较小,在5%以内;箱梁截面的弯矩随斜度的增加而减小,且斜度在0°～11°之间变化最大;箱梁截面的扭矩随斜度的增加而增加,且斜度在0°～11°之间变化最大;各墩上下游反力随斜度的增加越来越不均匀,且其差值也不断增加;考虑竖曲线的水平拉力和不考虑竖曲线的水平拉力相比,其差值随曲率的增加而增加,且曲率反向时差值随曲率的增加迅速增加。
Taking the Liuyanghe Bridge in Yingpan East Road of Changsha as the engineering background, the simulation model of inclined continuous girder with the guide beam, jacking platform and temporary pier was established by using Midas / Civil software. The effects of slope and vertical curvature on the bilayer Influence of Diagonal Continuous Box Girder to Push Construction. The results show that the slope has little effect on the stress of the box girder and is within 5%. The bending moment of box girder section decreases with the increase of the slope, and the slope changes most from 0 ° to 11 °. The torque of the section increases with the increase of the slope, and the slope changes most from 0 ° to 11 °. The reaction force at the upstream and downstream of each pier increases more and more unevenly with the increase of the slope, and the difference increases continuously. The difference between the horizontal pull considering the vertical curve and the horizontal pull without considering the vertical curve increases with the increase of the curvature, and the value of the backward curvature of the curvature increases rapidly with the increase of the curvature.