A substructure method for structural model updating of long-span cable-stayed bridges

作者：Zhou, Lin-Ren; Ou, Jin-Ping

来源：Journal of Vibration and Shock, 2014, 33(19): 52-58.

DOI：10.13465/j.cnki.jvs.2014.19.009

• Experimental verification
• Long span cable stayed bridges
• Model updating
• Objective functions
• Scaled physical model
• Structural model updating
• Structural system properties
• Substructure method

A substructure method of model updating was proposed for cable-stayed bridges. Several substructures were divided according to structural system properties of cable-stayed bridges. Then, the sensitivity analyses of structural response characteristics with respect to the updating design parameters of cable-stayed bridges were performed to check the independency and resonableness of the substructures, and to determine the model updating sequence of the substructures. An objective function was constructed by using the residuals between tested and analytical data of each substructure, and the genetic algorithm was implemented to optimize model updating of each substructure. Numerical study and experimental verification of the proposed substructure model updating approach were performed based on a scaled physical model of a long-span cable-stayed bridge. The results indicated that the model updating based on the simulated data has a higher precision, and the model updating based on experimental data can get reasonable explains being consistent with the actual situation, so this substructure method works well and can be easily implemented in practice.

• 出版日期2014-10-15
• 单位华南理工大学