Model Design And Experimental Research On Dalian Xinghai Bay Bridge

By focusing on the Dalian Xinghai Bay Bridge with the main span of460m, a1:50scale model is made in the laboratory according to the similitude theory. Then the static and dynamic test of the model is carried out. The work of this paper mainly includes the several parts as follows:1) Determined the basic parameters of the model according to the tasks of the experiments and conditions of the laboratory, such as the suitable reduced scale and the material of the model; Obtain the similarity relationship and similarity ratios by static and dynamic similarity theory. What’s more, Effective stiffness similar was used to guide the design of the model.2) During the process of the model design, a new concept of similar adjustment factor is proposed to solve the large scale model with heavy and difficult load weight under the limited conditions. The research shows that the similar adjustment factor is reasonable in theory and can properly reveal the similarity between the model and the proto-bridge. Besides the model with similar adjustment factor can facilitate the design and load testing.3) Under this basis, the processing program of making the model is determined and the model drawing is given out. Each component was assembled in the laboratory. Besides, the static and dynamic test system was designed including the selection and arrangement of the strain and sensor, and the appropriate data acquisition equipment.4) In order to determine the correctness of the model and the rationality of the production process, both2-D and3-D finite element models are established to analyze the static and dynamic properties of the model. The results obtained from the test and the simulation of the FEM match well, which show that the design meets the capacity requirements and can offer a reliable theoretical and experimental basis on the design and construction of the bridge.