Finite Element Analysis Of Overall Structure Of Large-scale Coal Storage Silos

As the development of economic in China, the improvement of living standards, demand for electricity is increasing. In order to reduce the impact of cost in rising prices for coal and increasingly stringent environmental requirements, many coal-fired power stations is rising the requirements of the coal silo. Therefore, the coal silo towards a higher, greater and more durable trend. However, compared with the medium and small silo, the requirements of large-diameter concrete silos are more stringenter. Not only to consider the impact of concrete defects for the concrete material (for example, cracking, etc.), but also is particularly concerned in the impact of settlement, deformation and structural stress of the cylinder overall, concerned in the impact of heat generated by coal and seasonal temperature. In recent years, domestic and foreign scholars and experts have a more profound study in large-diameter coal silo, Mainly in the field of distribution of pressure in the coal side, the cracks in silo wall research and the study of the influence of temperature on the structure. Due to the theory in the large diameter coal silo overall force and the upper part of the structure and foundation is not perfect, the design and construction of large-diameter coal silo have caused great distress. The design and construction of large-diameter coal silo, especially the specification for the structure of large diameter concrete silo still need to improve. This paper studies the overall structure of the deformation and internal force of the overall model of the large-diameter coal silo that effected in the coal storage vertical pressure and lateral pressure, and discusses the inherent relationship between the superstructure and foundation and substructure.This paper that examples of a power plant in Huozhou of Shanxi Province, analysising by ANSYS (the finite element software), establishes bycalculation model, completed the overall analysis and local nonlinear analysis of the large-diameter coal silo, derives the reference materials what can be used for the design of practical engineering.Conclusion:By analyzing the overall of the large diameter coal silo, the openings of the silo wall and the connection of the basis and silo wall, will be generate stress concentration, that must be processed by strengthening the stiffness of these parts; the stress in the part of silo wall which have pilasters is smaller than the part of none. By analyzing of partial nonlinear analysis, the structure which not set rotating pile, the shear in the pile increases about75%; the flexural strengthes about42%.Therefore, the main role of Chemical Churning Pile in the structure is to enhance the capacity of the Pile to resistance bending and shear; Similarly, the horizontal displacement of silo wall which have pilasters structure reduced by35%than none, and internal force big changes,and the change in the internal forces is large.