Analysis Of Construction Control Error Of The Super-large Span Hybrid Beam Cable Stayed Bridge

In recent years,with the rapid development of the national infrastructure,the long-span hybrid-beam cable-stayed bridge has been developed rapidly in China,and the multi-span hybrid-beam cable-stayed bridge has been built.In this paper,based on the concept of stress-free configuration,the structural parameter sensitivity analysis is carried out based on the concept of stress-free configuration.The main research contents and related achievements have the following three points:(1)Geometric nonlinear effects for super-long span cable-stayed bridges,the basic idea of the stress-free configuration method is described in detail,the geometric non-linear influence of the structure is discussed,and the key components of the cable-stayed bridge(stay cable and main beam)are discussed.The calculation of the stress-free state of the main tower.(2)According to the whole process of construction of Jiayu Changjiang Highway Bridge,a finite element analysis model based on Jiayu Yangtze River Bridge was established.The main theoretical calculation results of construction control are given,and the difference between the measured value and the theoretical value is compared,and the accuracy of the model is verified.(3)In this paper,the stress-free configuration control method based on the geometric control concept is used to calculate the parameter sensitivity by changing the structural parameters.Based on this,the behavior of manufacturing linear and bridge structures is affected by the variation of various parameters,which provides a reference for the construction control of long-span asymmetric hybrid beam cable-stayed bridges.