Symmetrically Construction Monitoring Analysis and Completed State Evaluation of a Tied Steel Box Arch Bridge Based on Finite Element Method

Because of their beautiful appearance, strong crossing ability, and reasonable stress performance, the application tied steel box arch bridges is becoming more extensive. Bridge construction monitoring can control adjust deviation state to ensure linear bridge after completion. This study carried out a symmetrical analysis completed evaluation newly built Dafeng River in Guangxi Province based on finite element method. MIDAS Civil software used for simulation calculate deformation at completion stages. The tensile compressive main transverse brace, as well cumulative displacements lattice beam, are symmetrically distributed. maximum stresses 15.1 MPa 74.6 MPa, respectively, less than specification’s allowable value. Meanwhile, under loading combinations serviceability limit bearing capacity ultimate state, arch, beam meets specification requirements. cable forces suspender tie rod 2189.4 kN 2991.2 kN, corresponding minimum safety factors 3.2 2.7. In addition, deviations between on-site theoretical values within range force deck alignment. It indicates that effect ideal, provide basis monitoring.