| 1. | The main structure of caiyuanba yangtze bridge in chongqing , up to date the largest - span tie bar arch bridge , is formed by two side tie bars and one middle tie bar which unite the y - shape rigid framework and arch rid . therefore , tie bars are one of the key components 重庆菜园坝长江大桥是迄今为止世界上跨度最长的系杆拱桥,该桥的两根边系杆和一根中系杆将南北两岸的y型刚构和中间的拱肋连成一个受力整体,构成该桥的主结构,因此系杆是该桥关键受力部位构件之一。 |