JIMMA UNIVERSITY JIMMA INSTITUTE OF TECHNOLOGY SCHOOL OF GRADUATE STUDIES CIVIL ENGINEERING DEPARTMENT EVALUATION OF STRUT AND TIE MODEL FOR RC DEEP BEAMS USING NONLINEAR FINITE ELEMENT ANALYSIS A Thesis Submitted to School of Graduate Studies in Partial Fulfillment of the Requirements for Degree of Master of Science; in Civil Engineering with Specialty in Structural Engineering By Meseret Shimelis December, 2017