Research On Constrcution Control In Zhenhai Tied Arch Bridge

The tied arch bridge is a new type bridge which belongs to beam-arch composite system. There are many construction methods of tied-arch bridge, and the construction progress is very complex. Besides, there are several system transformations during the construction. The stress of the structure will become more complex. The linear will change with the tensioning condition of the booms and the shrinkage and creep of concrete. So we should make real-time monitoring of arch bridge under construction. In the monitoring process of the tied arch bridge. The research about the environment vibration influence on structure status and finite element simulation method of full framing of the booms were penurious.In this paper, taking Zhenhai tied arch bridge as engineering background, the influence of environment, the force and deformation of structure and error influencing factors of the booms are studied, with finite element analysis based on the experimental results. The main research contents are as follows:Firstly, the model established with the finite element software simulate full framing. It is verified that the model is correct, and the construction process is analyzed;Secondly, on the base of taking both beam and arch alignment into account, the shorter boom is adjusted with based on lots of methods such as the influence matrix method and the adjusted coefficient of correlation method. Monitoring results show that the cable force measurement values are in good agreement with the design value;Thirdly, the impact of environmental vibration on the construction of bridge is test on the basis of the vibration frequency method. Construction influence factors of derrick cable force is analyzed. It is provided basis for cable force monitoring project of the same kind of bridge...