| The rapid development of China's agricultural economy promotes the development needs of various types of irrigation and water conservancy projects continue to increase.The engineering tasks undertaken by hydraulic structures continue to increase?To this end,designers have developed various types of new structures of water conservancy projects to meet the large flow,large span design requirements.This paper takes the aqueduct water damage restoration project in an irrigated area of Hunchun city of Jilin Province as an example,through numerical simulation calculation of aqueduct structure by large common finite element software Ansys,analyzed the mechanical behavior and deformation characteristics of the structure.By used finite element method,numerical simulation analysis of aqueduct body structure and pile foundation structure and comparison of mechanical characteristics of different structures came true,summed up their respective advantages and disadvantages and applicable conditions.In view of the characteristics and difficulties of the project,it provided the reference for the engineering design and the optimization of the structure.To summarize and study the finite element theory of complex structure calculation,understand the finite element analysis process,and discuss the feasibility of using finite element software to simulate the aqueduct structure.Take the aqueduct water damage restoration project as an example,based on the numerical simulation analysis of the stress characteristics of aqueduct structure under different working condition using finite element software,discuss the deformation,stress mechanism,bearing capacity and corresponding measures of the main parts.Through simulation analysis,compare the force characteristics of two kinds of girder aqueduct body structures,study their respective advantages and disadvantages,and summarize their respective applicable areas.To explore the feasibility of implementing pile-soil-pier structure model in the finite element calculation software;through numerical simulation,to calculate the settlement results aqueduct support structure in various load conditions,to analyze forces of bearing structures such as the pile and cushion cap,to ensure that small displacement requirements of the upper structure of continuous beam body.Through the summary of the existing achievements and the study of the theoretical basis of software calculation,it is feasible to use the commercial general software Ansys to review,calculate,analyze the force characteristics and characteristics of the structure.In this paper,the finite element analysis software is used to carry out numerical simulation analysis of the large span beam structure rectangular aqueduct,and the mechanical behavior of the structure under different combinations of working conditions is obtained.The tensile and compressive stresses in the midspan section of simply supported beam are larger than those of continuous beam,and the deflection and deformation condition are unfavorable.The continuous beam structure has good integrity and can save the investment of the project.By using the holistic modelling method of the pile-foundation-soil model,the load carrying capacity and bearing behavior of the continuous beam aqueduct under different working conditions are calculated respectively.The calculation results show that the foundation settlement of this kind of structure is small and will not affect the superstructure. |
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