Comparison Of Various Methods Used In
The Analysis Of Silos Without Wall Friction
Author(s)
M. Khouri
Abstract
The use of circular silos with independent hopper structure in the process of
storing grain and other granular material has become very extensive nowadays.
The structural analysis of silos is of a complex nature and requires sophisticated
mathematical techniques for proper calculation. Janssen, Airy and Reimbert
suggested different material lateral pressure approaches that can be followed in
the process of calculating silo wall forces. This paper compares the above three
methods to the water behaviour approach and makes use of the finite element
method to check the closed form techniques. Also, average values of the three
approaches were determined for various silo dimensions and graphed for the use
of engineers and designers.
1 Introduction and background
Different types of silos have been developed but the most used are circular ones.
Recently, the use of a totally independent structure of hopper within the silo was
found to be more economical due to the isolation and simplicity in the process of
construction and design. Silos depend on many factors such as the stored
material, the type of silo, the construction material properties, the height and
diameter of the silo, wall thickness, the angle of the hopper, etc.
Many investigators have studied circular silos. Timoshenko et al. [1,2]
presented the differential equation that can be used in solving silo problems. The
equation calculates the deformation shape of the wall for any pressure function
by isolating a vertical strip in the wall and using symmetry. In 1895, Janssen [3]
suggested a pressure application approach, while Airy [5] addressed his pressure
application approach in 1897; Reimbert and Reimbert [4] in 1976 suggested a
pressure application approach, which is similar in nature to the other two
Keywords
Related Book
Other papers in this volume
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