The Study of Local Stress at Arch Foot of Steel Box Stacked Tied Arch Bridge on Harbin-Dalian High Speed Railway Line

摘要

Xinkaihe Bridge is the first long span steel box stacked tied arch bridge of high speed railway in China. In this the sis, the study of local Stress toward Xinkaihe Bridge on Harbin-Dalian high speed railway line is taken. According to the Saint-Venant principle,an accurate shell element model of "tied girder-arch rib-suspender-cross beam" system is established by using the 3D finite element calculation software of ANSYS, the loads applied on structure and the true boundary condition are simulated,and the stress distribution property at arch foot under the dead load and ZK live load is obtained. As an important forcing member that transmits the load on upper structure to foundation, it is quite complex of the mechanic property at arch foot. From the calculation results,it can be concluded that: although the high values of stresses at top support plate and the variable cross-section place of tied girder are lower than the material yield stress of steel,it is also worthy to pay more attention to the local stress at arch foot in design and con struction to ensure the security of bridge structure.