GNSS Dynamic Deformation Characteristics Analysis of Long-span Double-tower Cable-stayed Bridge During Operation Period
With the increase of bridge operation years,the permanent deformation and long-term per-formance changes caused by structural performance degradation,cable tension relaxation,foundation set-tlement,etc.are the common concerns for the safety of large-span bridge operation.This paper takes the Sutong Bridge as an example and uses the continuous pseudo-static processing mode to obtain high-preci-sion dynamic deformation results of 16 key parts of GNSS.It analyzes the three-dimensional displacement characteristics of different monitoring sections during the daily operation period from 2021 to 2022,inclu-ding continuous displacement amplitude changes and temperature correlation,displacement differences at different monitoring points during the same period,displacement distribution and monthly mean changes at monitoring points,and Sunday recoverability.The impact of construction on the plane and elevation changes of upstream and downstream mid span monitoring points during two semi enclosed intensive main-tenance construction periods are compared.The relevant results can provide reference for safety monito-ring,long-term performance analysis,scientific management and maintenance of large-span cable suppor-ted bridge structures.
NETL
NSTL
万方数据
