Wind-induced Vibration Response Analyses Of Long-Span Arch Bridge Considring Soil-Structure Interaction

With the development of science and technology, the span of bridge tends to be increasing and that the wind-resistant problem has become a key problem in the design of long span bridge. In recent analyses of wind-induced vibrations of long span bridge, some simplifications have been made due to the complexity of the calculation. Especially few researches have been carried out to consider the soil-structure interaction effect. Reviewing the present situation of soil-structure interaction research, the wind-induced vibration response analyses of long span arch bridge considering soil-structure interaction are chosen as the topic of this thesis. The main tasks are as follows:1. Two methods of artificial simulation of turbulent wind velocity: the linear filter method and the harmony superposition method were introduced,the corresponding computer programs were respectively prepared. Calculation analyses results of the two programs were comparative analyzed.2. Taking a long-span concrete-filled steel tube arch bridge as an example, based on the software ANSYS, two kinds of spatial finite element models for the bridge were respectively established, under the consideration of the arch foot fixed and the interaction among the soil and the pile and structure. Calculation analyses results of dynamic characteristics of the two models were comparative analyzed.3. The influence of wind-induced vibration response of long span arch bridge considering pile and soil and structure interaction were analyzed, mainly considering static wind response and buffet response.Some useful conclusions were given through the research, the wind-resistance research of the long-span arch bridges were further improved and valuable reference was provided for the wind-resistant design of similar bridges.