Static And Dynamic Analysis Of Long Span Extraversive And Asymmetric Arch Curve Bridge By Grillage Method

According to the design of an extraversive and asymmetric arch curve150m main span bridge, a finite element model is established based on beam elements using the commercial software MIDAS/CIVIL2012. The model is used to analyze the static behavior and dynamic performance.Firstly, an introductory is reviewed of the development of steel arch bridge in China and abroad and the characteristic of extraversive arch bridge is summarized. Then elaborate the background of the thesis. Builting beam elements for main girder by the basic principle of beam grillage,built the beam elements for arch,built truss elements for boom and tie. Displacement, internal forces and stress under single action and combined action of dead load, vehicle load, non-motor vehicle loads, crowd loads, horizontal wind load, temperature system and temperature gradient etc of the bridge structule are analyzed. Free vibration characteristics of with and without piles and soil are analized by using Lanczos method. Displacement and stress under the action of longitudinal, horizontal and vertical earthquake are analized by spectrum analysis and time history dynamic analysis. At last,analysis the elastic stability on no boom bare arch effect, single dead loads and both dead loads and live loads.