- 1563 - Strain Absorption Optimization of Reinforcement in Geosynthetic Reinforced Slope—Experimental and FEM Modeling Hossein Moayedi PhD Candidate, Department of Civil Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia e-mail: hossein.moayedi@gmail.com Bujang B. K. Huat Professor, Department of Civil Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia e-mail: bujang@eng.upm.edu.my Afshin Asadi Post- Doctoral, Department of Civil Engineering, University Putra Malaysia, Serdang, Selangor, Malaysia ABSTRACT The interaction between shear plane and Geosynthetic reinforcement in reinforced slope were carried out by using direct shear test apparatus. The reinforced soil specimens were installed through the large shear box in five different systems including 0, 30, 45, 60 and 90 degrees of reinforcement orientation with respect to the vertical axis in shear box. Results showed maximum shear results when interaction angle were between 45 to 60 degrees. In such angle of reinforcement orientation strain absorption showed its maximum values in all effective vertical axes of 50, 100 and 200 kPa, which mean the maximum shear tension, observed. This optimization can be due to better interaction between both coarse granular soils with Geogrid apertures which eventually give rise to more tension stresses absorption of reinforcement through the reinforced soil. KEYWORDS: Reinforced slope, shear strain, strain absorption, Tension, FEM. I NTRODUCTI ON Reinforced slopes are basically compacted fill embankments that incorporate geosynthetic tensile reinforcement arranged in horizontal planes. The tensile reinforcement holds the soil mass together across any critical failure plane to ensure stability of the slope [1, 2 and 3]. The use of geosynthetics increases bond in the soil system due to the interlocking of the soil particles with the reinforcement aperture as well as enhancing the bearing resistance of the transverse members of the reinforcement [4, 5]. The effectiveness of the reinforcements in contributing an increase in the shear resistance is highly dependent on the orientation of the