Research on the Mechanical Performance of Long-connected Prestressed Concrete Continuous T-beam Bridge with Spliced Width
Existing infrastructure projects are increasingly unable to cope with rising traffic de-mands due to sustained and rapid socio-economic development in surrounding areas.Urgent measures are required to expand and renovate current highways.This study focuses on the primary bridge of a long continuous T-beam bridge in a practical project.It establishes MIDAS/CIVIL three-dimensional finite element(FE)models to analyze the effects of concrete shrinkage,creep,gradient temperature variations,and overall temperature fluctuations on longitudinal and transversal girder deformations.The findings reveal that prestressed continuous beam bridges with fully spliced longitudinal spans expe-rience deformations in both longitudinal and transverse directions under four long-term loads,with maximum values typically occurring at abutments or piers at the end of each continuous segment.Con-crete shrinkage notably influences transverse bridge deformation post-splicing,accounting for up to 60.95％of the total deformation.Additionally,derived formulas enable a rapid estimation of concrete shrinkage effects,with formula-derived values showing errors within 5％.
万方数据
维普
