الفهرس 
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Abstract
This thesis presents innovative composite columns reinforced with various types of metallic and non metallic mesh reinforcement. This research was designed to investigate the feasibility and effectiveness of employing various types of reinforcing meshes. Non metallic reinforcement was used such as tensar, polyethylene and fiber glass meshes reinforcement were used for durability
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and protection against corrosion of reinforcing steel. Metallic reinforcement, such as galvanized welded steel mesh and expanded metal mesh were employed. To accomplish this objective, an extensive experimental program was conducted. In addition nonlinear finite element models were developed to simulate the behavior of the proposed test specimens and to compare with the experimental results. The experimental program comprised casting and testing seventeen square ferro-cement composite concrete columns having the total dimensions of 150x1150x1500mm. One additional conventionally reinforced concrete column was cast and tested, used as control column. The experimental program comprises five designation series. Series A consists of four columns C1-A, C2-A, C3-A and C4-A, which reinforced with one layer expanded steel mesh, two layers expanded steel mesh, three layers expanded steel mesh and two layers expanded steel mesh without using stirrups respectively. Series designation B comprises columns C1-B, C2-B, C3-B, C4-B, C5-B and C6-B, which reinforced with one layer welded steel mesh, two layers welded steel mesh, one layer welded steel mesh with stirrups, two layers welded steel mesh, three layers welded steel mesh, four layers welded steel mesh respectively. Series designation C comprises columns C1-C, C2-C and C3-C, which reinforced with one layer gavazzi mesh, two layers fiber glass and three layers fiber glass mesh respectively. Series designation D comprises columns C1-D and C2-D, which reinforced with one layer expanded steel mesh and one layer welded steel mesh and two layers expanded steel mesh and one layer welded steel mesh respectively. Series designation E comprises columns C1-E and C2-E, which reinforced with one layer tensar mesh and two layers tensar mesh respectively. All eighteen test specimens were tested under concentric compressive loadings until failure. The structural performance of all the tested columns in terms of strength, stiffness, cracking behavior, deformation characteristics, ductility and energy absorption properties was investigated. The structural behavior of the developed ferro-cement composite columns was compared to that of the control test specimen. The experimental results emphasized that high ultimate loads, better crack resistance, high ductility, and good energy absorption properties could be achieved by using the proposed ferro-cement columns. Comparison between the experimental results and the results obtained from the finite element analysis models showed that there is a close agreement for all the tested specimens. This agreement verified the validity of these developed models.