CAJ | 학술논문

The solution and computational aspects on nonlinear deflection of YongjiangRailway Bridge in Ningbo were investigated. An approximate iteration algorithm onnonlinear governing equation was presented, and the obtained results show that, if altitudedifference and span of the riverbanks are taken as 5 meters and 100 meters, respectively,the maximum gradient in the middle of the bridge exceeds 5% , much larger than maximumallowance gradient in railway design code. Therefore, a new solution scheme fordecreasing gradient of the bridge is put forward , that is, the altitude difference between tworiverbanks can be decreased to about 1/10 of the initial magnitude by building roadbedswith 0.5% gradient and I kilometer length at two riverbanks. As a direct result, thedeflection gradient of the railway bridge is much reduced and the value is between0.5% ～0.6% .