Influence on internal force of multi-pylon cable-stayed bridge by setting double row bearings

Stiffness problem is one of the prominent problems of multi-pylon cable-stayed bridge.Based on the existing method of improving the stiffness and the geometry nonlinear effect of the long span cable-stayed bridges,the finite element model has been built in this paper.The stiffness,the way of force transmission and the distribution of internal force of six tower cable-stayed bridge are analysed by setting double row bearings with different distance.As a result,stiffness can be improved 10%.There is a best region for space between double row bearings.Besides,there’s the influence on internal force of towers and cables.