Analysis Of Parameters Sensitivity Of Jiashao Bridge

Economic development has led to the popularity of the multi-span cable-stayed bridge.This paper discussed the Jiashao Bridge which will be the longest and widest multi-span cable-stayed bridge throughout the world. Compared to the general cable-stayed bridges, the parameter sensitivity analysis during construction monitoring becomes quite significant for the multi tower ones.This paper firstly gives a brief description of the development, force characteristics, and application scope of multi tower cable-stayed bridges. The engineering background and modeling process of Jiashao Bridge is also introduced. Furthermore, the parameters which are prone to error in the construction control are listed. By controlling those parameters within a certain range, structural response of the finishing stage (Construction process analysis will be required for some of the parameters) is assessed and then compared with the structural response of the reference condition, the relative change and absolute change of each concrete structural response during the varying procedure of the parameters will be obtained consequentially. Finally, the analysis results are collected, generating the order of sensitivity according to each specific structural response, which is used for adjusting displacement and internal force in time during the construction. Concluded that the main beam and weight-related parameters is the sensitive parameterstower partial, while the temperature is sensitive parameters to the partial tower, cable tension, the main beam linear internal forces throughout the construction process,but also which isconstructionartificially difficult to control the process parameters. The parameter sensitivity analysis is significance in order to achieve the best approximation of actual structural response and design of state.This paper mainly focuses on the research of Shajia Bridge, a particular case of six-tower cable-stayed bridges. It would be of greater practical significance if the results can be extended to other multi tower cable-stayed bridges. The paper is different from the cases of the other bridge, the large number of tower, bridge longer, four cable plane.Soparameter screening, analysis and modeling methods,which are more of its marketing significance.