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Finite Element Analysis for Large U-type Prestressed Thin-walled Aqueduct

Author: FengNa
Tutor: ZhangLeiShun
School: Zhengzhou University
Course: Hydraulic Structure Engineering
Keywords: Aqueduct Prestressed Concrete Finite Element Initial strain method Strength Tension sequence
CLC: TV672.3
Type: Master's thesis
Year: 2010
Downloads: 66
Quote: 0
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Abstract


With the rapid development of China's economy , the part of the developed areas in China appear insufficient or uneven distribution of water supply , and the increasing intensification of contradictions . In order to resolve the status of the uneven distribution of water resources , the countries have put forward the idea of the South . Aqueduct is an important part of the South-to-North Water Diversion Project , which enormous importance and size of many aqueduct engineering to make the structure has sufficient crack resistance and impermeability ordinary reinforced concrete structure can not meet the requirements , it is necessary to adopt prestressed reinforced concrete structure . Prestressed concrete not only has a strong crack resistance and impermeability , can also reduce the structural weight , and take full advantage of the strength of the material so that the structure of economic rationality . This paper is focused on the analysis and research of prestressed concrete aqueduct . ( 1 ) First, the the Aqueduct , and prestressed development background , as well as the loss of prestress distribution characteristics and calculation methods . And combined with the large-scale analysis software ANSYS , prestressed applied in ANSYS . The actual project specific analysis of the mechanical characteristics of a large aqueduct and deformation law . ( 2 ) the use of finite element software ANSYS Finite Element Analysis of the South-to-North Water Diversion Project in Shahe prestressed aqueduct , the initial strain method to achieve the purpose of prestressed design water level calculated Aqueduct in completion period , increase the water level and hoop and longitudinal stress values ??of the full tank level four operating conditions , and applied to calculate the results before and after strand compared draw aqueduct has sufficient strength , rigidity and stability in the reinforcement after the structural safety reliable, design prestressed scheme is feasible . ( 3) to the strand of the points Shahe Aqueduct U-shaped structure , prestressed steel strand the longitudinal strand and ring in the construction process , there will be tension sequence contradiction . Simulation using finite element analysis , discussion and draw the best of the construction program , provides a theoretical basis for the organization of construction , in order to achieve the goal to shorten the construction period, to facilitate construction and to ensure construction safety .

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Water, water diversion project > Conveyance structures > Aqueduct
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