ADDIS ABABA UNIVERSITY ADDIS ABABA INSTITUTE OF TECHNOLOGY SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING ANALYTICAL AND FINITE ELEMENT ANALYSIS OF RAIL DEFLECTION AND BENDING STRESS UNDER DIFFERENT SLEEPER SPACING A THESIS IN RAILWAY ENGINEERING, CIVIL STREAM. BY LEMMI GURMESSA TESSO April 25, 2017 Addis Ababa A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science