论文部分内容阅读
为探索空间缆索悬索桥合理的体系转换方案,以主缆空间效应显著的江东大桥为原型,按照几何缩尺比1∶16设计了全桥缩尺模型,利用该模型进行了3种体系转换方案。体系转换后模型的索力及线形与理论计算非常一致,说明所采用的计算方法在吊索力控制、线形控制方面具有足够的精度。结果表明,通过调整吊索的张拉次序可以解决部分吊索安装前后横向角度差变化大的问题;由于主缆的扭转刚度难以准确确定,为减小施工误差,可通过扭转角的实测数据及时修正索夹空间安装角度,同时吊索索夹应尽量延迟安装紧固。
In order to explore a reasonable system transfer scheme for space cable suspension bridges, a full-bridge scale model was designed according to the geometric scale ratio 1:16 with the main cable space effect Jiangdong Bridge as its prototype. Three kinds of system conversion schemes were carried out using the model. The cable force and linearity of the system after conversion are very consistent with the theoretical calculation, which shows that the calculation method adopted has enough precision in the control of sling force and linear control. The results show that by adjusting the tensioning order of the slings, the problem of large changes in the lateral angle difference before and after the partial sling installation can be solved. In order to reduce the construction error, the torsional stiffness of the main cable can not be accurately determined. Fix the installation space for the cable clamps, and at the same time the cable clamp should be delayed to install and tighten.