Static And Dynamic Analysis Of City Steel Box Continuous Girder With Large Cantilever Coping Pier

Firstly, an introductory review of structural characterics of continuous steel box girder bridges and large cantilever coping piers are summaried, and the project background and the main research work are described in this thesis. The three dimensional finite element model of the entire bridge, which is a27.5m+50.0m+28.2m span city continuous steel box girder, is developed using general commercial sofware MIDAS/CIVIL2012, and the finite element simulation of various parts of the bridge is detailed described. Forcs of the bridge are analyzed detailedly under dead load, live load, system temperature and girder temperature gradient in operational phase by this model, stresses and disformations of the bridge are analyzed and checked according to the most unfavorable load combination; the free vibration modes and frequencies of the bridge are analyzed using Lanczos method, spectrum analysis and time history dynamic analysis are carried out recpectively to analyze earthquake response. Static stability of the bridge subjected to both dead loads and live loads are analyzed. Finally, a combined finite element model, which involves plate elements and solid elements, is developed using the general finte element software AGLOR, the members stress distribution and disformation of the main plates of steel box girder, such as top slab, bottom slab and vertical diaphragm and piers are analyzed sufficiently.Therefore, the static characteristics, dynamic characteristics as well as stability of the structure are evaluated. Calculation and analysis complex bridge method by finite element software are mastered.