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Education

2023

Doctorate - Prof. Hany Ahmed Aly Abdalla, Cairo University...... Prof. Osman M. O. Ramadan , Cairo University... Mohamed H. Abdelbarr, Cairo University - Egypt

This research aims to study the thin-walled silos by conducting a 3D finite element model (FEM). The finite element model can predict the lateral wall pressure distribution at the end of the filling phase for noncircular silos. The numerical approach, using ABAQUS software, estimates the stress state in bulk solids and the pressure exerted on the silo walls. An elasto-plastic model using the Drucker-Prager criterion was employed to simulate the behavior of the granular materials. A surface-to-surface discretization model is used by the FEM to simulate how the bulk solid behaves and how it interacts with the wall and base of the silo. The model’s results were validated against previous experimental measurements and existing theories. The results revealed good agreement between the FEM predictions and the experimental measurements. The research confirmed that the lateral pressure distribution is not uniform at any silo level. This highlights that many available theories and current design codes are inaccurate for flexible steel walls. As a result of the wall’s deformability, pressure regimes on the silo wall change significantly in the horizontal direction at any level. The results showed that the horizontal variations of lateral pressure significantly change concerning wall stiffness. The FEM was used to study the influence of crucial parameters on the distribution of wall pressures. The effect of granular material mechanical characteristics on lateral wall pressure is studied. The effect of silo dimensions on the lateral wall pressure was studied. The effect of ring beams on filling wall pressure and lateral deformation was examined. Most design guidelines recommend that the silo wall be rigid and that the wall pressure ratio remains constant throughout the silo’s height. In the case of a concrete silo, the assumption of a rigid wall is acceptable; however, this assumption is not accurate in the case of a silo with a thin metal wall. As a result, identifying the wall width-to-thickness ratio for metal silo walls is critical in assessing whether or not the code should be used. The major outcomes were reviewed to provide a simplified design approach for the unstiffened square planform silo. A new method was also suggested for square and rectangular silos that hold two types of granular material. It is based on the circular silo that has the same volume as the real silo. Thus, substantial variations in the amplitude of the wall-filling pressures applied on the wall have been established. A series of comparisons were conducted between the new approach’s outcomes and finite element results to demonstrate their applicability.

2008

Bachelor - College of Engineering -

Bachelor of Science - BSc with grade Excellent Construction and Building department

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Certificate of Appreciation, i was first of gradution year 2008

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  • Egyptian Engineering Syndicate

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Teaching Courses

Course Academic year Term

CB240 - Theory of Structures

2012 Fall Semester View All Content

CB557 - Inspection, Maintenance, and Repair of structures

2012 Fall Semester View All Content

CB251 - Testing of Materials

2010 Fall Semester View All Content

CB242 - Strength of Materials

2009 Fall Semester View All Content

CB343 - Structural Analysis 2

2008 Fall Semester View All Content

CB241 - Structural Analysis 1

2008 Fall Semester View All Content

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