Stay Cable Tension Optimization for Completed Extradosed Bridge Based on Comprehensive Optimization Method
This paper presents a comprehensive optimization method to determine the effective tension of stay cables in the completed extradosed bridge.The presented method takes the influence matrix method as the basis,utilizes the data standardization method to convert the discrete data of two or more types into dimensionless unified data,and finally finds the solutions of the tensions of stay cables,supposing the comprehensive displacements and bending moments of the control cross-sections are at the minimum.The extradosed bridge carrying a section of the Nanjing Metro S6 was used as a case for the study.The calculations conducted by using the minimum bending energy method,rigid support continuous beam method and comprehensive optimization method,respectively were compared with the original design tensions of stay cables.The results demonstrate that for the extradosed bridge,the presented comprehensive method generates the most effective tensions of stay cables as well as the most effective distribution of bending moments in the deck,under dead loads.Compared with the original design tensions of stay cables,the calculations conducted by the comprehensive optimization method display 3.3％and 3.8％reduction of the maximum compressive stresses in the top and bottom flanges of the main girder,respectively,as well as better distribution of stresses in the main girder.
extradosed bridgerational completed bridge statestay cable force optimizationinfluence matrix methodcomprehensive optimization methodfinite element method
万方数据
维普
