Analysis of Mechanical Properties of Leaning Arch Bridge

摘要

With the finite element method as the theoretical basis,numerical simulation for calculating means,leaning arch bridge static,stability,dynamic characteristics and the response spectrum method are analyzed. Arch bridge in the dead load and lane loads,the main arch axial force is in line with the general concept of arch bridge mechanical property. Leaning arch effect in the vault under the main arch,the largest axial force occurs. In the dead load and the live loads, the arch longitudinal and transverse stability coefficient is greater than 5,meeting the stability requirements. Dynamic characteristic analysis shows that relative to the longitudinal stiffness,transverse stiffness is weak,which in the design and construction should pay attention to the upper junction between the main arch and stable arch. Leaning arch bridge under the action of response spectrum,the main arch in the vertical excitation reaches the maximum axial force,whereas stable arch in the vertical and horizontal excitation is maximum. Looking at the results of different direction,the vertical stiffness of the large has small result of earthquakes. Comprehensive result of seismic different direction,axial force distribution of the main arch and stable arch is roughly similar to the effect of static result.