Comparison and Selection of Proposed Bridge Types for Main Bridge of Yalu Boundary River Highway Bridge

The Yalu Boundary River Highway Bridge is an important international project connecting China and DPR Korea.In the light of the actual project conditions at the bridge site,two proposed bridge types for the main bridge of the bridge were compared,i.e.a steel box girder cable-stayed bridge with double pylons and double cable planes(the span arrangement being(86+229+636+229+86) m and the pylons being the H-shape concrete structures to be cast in situ) and a steel and concrete composite girder cable-stayed bridge with double pylons and double cable planes(the span arrangement being(87+228+636+228+87) m and the pylons being the inverted Y-shape concrete structures to be cast in situ).The plane link program Doctor Bridge V3.2.0 was used to respectively set up the finite element models for the two bridge types,the global mechanical behavior of the two bridges at completion and operation stages were analyzed and the construction convenience,durability and economy were analyzed as well.The results of the analysis show that the structural mechanical behavior of the steel box girder cable-stayed bridge is more advantageous,the construction is more convenient,the construction time schedule is shorter and the seismic performance is better and therefore the box girder bridge having 5 spans,double pylons and double planes is finally selected.