Cfst Arch Bridge Model Test Of The Seismic Analysis Of Structures

Because of so many kinds of advantages, such as load capacities, good plastic and earthquake resisting behavior and ductility, as well as convenience to construction, Concrete-Filled Steel Tubular (CFST) has been increasing widely used in constructions, especially in areas of bridge. Since the first CFST bridge named SiChuan Wangchang Bridge in China, CFST bridge has developed very fast. Since it is a completely new type of construction, theory research about CFST bridge is relatively behindhand. By far there has not been a criterion for this kind of bridge, especially in the area of dynamics property analysis and seismic analysis.During the research, I collected and summarized a great deal of data. Based on the theory of "Concrete-Filled-Tube Unified", I reckoned the analysis theory, and the seismic theory research in CFST bridge is introduced in this research. And in this paper a new kind of analysis method is used that combined the two kinds of material into one. So how to transform the characters of the material above is one of emphases in this paper.Basing on the model analysis theory, a strict similar model according to the Shaoxing Keqiao Bridge was made. And a series of experiments were finished in order to analyze the behavior under the condition of construction and function. And the date we've got is useful and will be for the present bridge construction and future.Besides the static analysis, the dynamics analysis is also the emphasis. In this section, we analyze the CFST bridge using both theory method and FEA method. During the FEA analysis we adopt both of the double-element method and effective section method to analyze the elastic seismic response of a deck-through CFST bridge. Through the modal, spectrum, and transient analysis, the elastic-plastic seismic response of the example is successfully finished. The results include the force reaction and displacement reaction on the control section.