Local Analysis of Main Tower in a Single Pylon Cable-Stayed Bridge

摘要

The main tower as the main load-bearing component of cable-stayed bridges, its safety has the crucial importance. Since the overall calculation of the bridge structure can not fully reflect the internal force of the key parts of the main tower, it is necessary to conduct the local calculation of the complex stress area of the main tower. In this paper, a 2×132m single tower cable-stayed bridge in Shaanxi Province is taken as an example, using Midas / civil software to analyze the main tower bifurcation section and the tower girder consolidation section. In order to comprehensively improve the calculation accuracy and computation efficiency, a multi-scale modeling method is applied in this paper. The calculation results show that the stress of the main tower bifurcation section is complex and the section should be modified. Also the stress of the consolidation section of the tower and girder satisfies the requirements of the code.