Large-span Curve Rigid Frame Bridge Static Characteristics

In recent years, curved bridge in China has made a large development, and also made a lot of efforts. With the rapid development of China's transport,. high-grade highways entered the Southwest mountain areas and deep trench region, more and more bridges will across them. The bridges in this region, especially when the bridge on the highway, the main features are high piers and curved beams, so curve rigid frame bridge came into being.This papers contains as follows:(1) Summarizes the history of the development curve bridges and the actual state, and introduced the curve rigid frame bridge in our country's development.(2) Describes the commonly used theory incurved rigid frame bridges and differential equations.(3) On the background of Ni Xigou Bridge, only change its radius of curvature in the finite element modeling.(4) By using the finite element software calculate five different radius of curvature of the rigid frame bridge under gravity during the construction phase and operation phase of the internal force under the action of live load and deformation. Reached the radius of curvature does not change the force of the most disadvantaged position, nor to change the laws of the location of the maximum deflection.(5) Through the different radius of curvature of cantilever construction and operation of the next phase of the analysis of different load conditions obtained under the weight of different radius of curvature, live load, temperature and other parameters on the curve of rigid frame bridge with the impact of internal forces and deformation laws for the curve just Optimal design of the bridge structure provides a theoretical basis.