Abstract: The girder and arch combination bridge of continuous rigid frame with V-shaped Support is studied in this paper. This paper introduces the design of V-shaped piers of the beam-Arch Combination System Bridge of continuous rigid frame. Using SMAD finite element computing method, the author pays attention to the analysis of influences that the size of pier bodies and boundary conditions make to the whole structure. Through the optimization of computing, the author treats the adverse influences that shrinkage, creep of second internal force, Pre-stressed and temperature of second internal force make to the structure. The ratio of lateral stiffness is 1926:1 between the tie beam and arch rib of the bridge. After the completions of main shrinkage and creep, constructing the arch of main girder and the suspenders are double erected by supporting cable,this method treats effectively the lateral stability of frame arch bridges with flexible bars. Three-dimensional seismic responses of the bridge show that all upper parts of the bridge's seismic forces are not the control internal forces of the bridge, then illustrate the structural design of the bridge have a good seismic performance. This internal force analysis and conclusions are useful to construction and design of similar bridges.
Abstract: Accurate determination of flutter derivatives for large-span bridges is of critical importance to ensure the reliability of the flutter analysis. Although much progress has been achieved both in the identification and testing methodologies of flutter derivatives, inadequate attention has been paid to the relationships among the flutter derivatives. In this paper, after a brief summary of the researches on the relationships among flutter derivatives, new relationships among flutter derivatives for the thin flat plate model was proposed based on Theodorsen’s aerodynamic force theory. The analytical formulas considering the influence of reduced frequency, were compared with the wind tunnel test results, determined by the covariance-driven stochastic subspace identification method. The validation of the relationships among flutter derivatives was experimentally verified and the possible application of them was discussed.