Examine Material Flow Patterns and Pressure Distribution on Silo Structure
Lokesh kumar1, Vinay Kumar Singh Chandrakar2,
**M.Tech. Scholara, Associate Professorb, Madhyanchal Professional University, Faculty of engineering & Technology, School of civil engineering Bhopal, M.P., India. **
Abstract
The design of silos requires accurate pressure calculation for structural stability and safety. Janssen’s Theory is the preferred method in most cases due to its consideration of wall friction, while Airy’s Theory provides a simplified approach useful for deep silos. The choice of method depends on silo geometry, stored material properties, and required precision in design. Structures used for storing bulk solids are referred to as bins, bunkers, silos, or tanks. While there is no universally accepted definition for these terms, shallow structures holding materials like coal, crushed stone, and gravel are commonly called bins or bunkers, whereas tall structures storing substances such as grain, cement, and wheat are typically known as silos. Elevated silos generally feature a conical roof, a cylindrical shell, and a conical hopper, and they can be supported by frames or reinforced concrete columns. Circular silos, made of either steel or reinforced concrete, are widely used across various industries, including cement plants (for clinkers), power plants (for raw coal), and the oil and gas sector (for sulfur pellets). The performance of elevated steel and reinforced concrete circular silos during earthquakes varies; reinforced concrete silos gain stability with the inclusion of shear walls, while steel silos improve their earthquake resistance when steel panels are added on opposite sides. The use of shear walls reduces structural displacement and enhances stiffness. This study presents the calculations for loads, load combinations, load assignments, earthquake parameters, and their analysis. The results are displayed and compared across different models, with maximum absolute and shear stresses represented through contour diagrams, tables, and graphs. Additionally, the minimum reinforcement requirements for beams and columns are specified.
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Key Words:- Dead load, Live load, and Seismic loads, Staad Pro, silo construction, Airy’s Theory, Janssen’s Theory
