Stress Analysis Of Temporary Stand Of Long Span Multipylon Cable-Stayed Bridge

Jiashao Bridge is taken as engineering back ground in this thesis, finite element software MIDAS/Civil and NLABS are used to set up the analysis model of temporary stand of X bracket, the periphery of the tower and side span which were used to carry out checking computation of strength, stiffness and stability of temporary supports.The analysis model also was used to comparing and selecting schemes of removing the temporary supports of side span. This study guide the construction unit to carry out construction very effective. The main research contents are as follows:1. Emphasizing that mechanical analysis of temporary supports is necessary through analyzing bridge collapse accident examples at home and abroad and summarizing the reasons.2. The theoretical knowledge which used in mechanical analysis of temporary supports are described, and the Jiashao bridge engineering background and finite element models of temporary supports are introduced.3. Mechanical analysis of temporary supports were carried out in several working conditions and the effect of various loads on the structure were analyzed to ensure the safety of temporary supports in the construction process.4. Schemes of removing the temporary supports of side span were compared and selected to ensure the closure of side span meet the requirements of height and successful closuring.