一种能够适应多种拱圈形状参数的拱架

本研究希望采用2或3种规格的下弦杆和1种标准规格的三角架来实现跨度为120~150m,矢跨比为1/5、1/6、1/7,拱轴系数为1.5~3.0的悬链线拱架的拼装,使拱架上弦节点与理论轴线节点间的误差不大于±5cm.本方法已经申请国家专利,其效果和益处是:拱架拼装完成后能很好地拟合主拱圈的设计线形,省去拱架上钢管支架,施工方便、缩短工期;拱架受力合理;拱架构造简单,连接处均采用传统的销接连接,连接方便、传力可靠;节省用钢量.

One Arch Center Adjusts to Several Arch Rings＇ Form Parameters

Figuring out 2 or 3 stationary sizes chord members and 1 tripod to piece the arch center which applies to these arch bridges whose span are 120 to 150 meters, the rise-span ratios are 1/5, 1/6, or 1/7, and the arch axis coefficient is 1.5 to 3.0, in the meantime, the difference between the joints on the up chord members and the theoretical axis is no more than 5 cm. The method has been applied for Chinese national patent, its advantages are that it can fit well the main arch design linear; it eliminates the need for the steel arch support, which facilitate the construction and shorten the construction period; the arch has reasonable force; the arch structure is simple, and conventional pin connection are used in the connect part, which is easy, and reliable for force transmission; it could save steel consumption.