چكيده به لاتين
Iran has long coastlines in the north and south that possess special importance from economic, social, political and even military viewpoints. In the northern coasts of country, water level rising has caused plenty of damage to coastal areas and buildings. Also, the ports built on the south coasts of country will loose their efficiency due to filling by sediments. Therefore, it is essential to consider specific measurments to avoid erosion caused by waves. Due to disadvantages of existing coastal protecting systems, particular problems of working in the sea, several difficulties resulting from erosion of concrete and steel, material durability, necessity of faster and easier and more accurate construction, saving in the materials volume, reduction of destruction risk of structures, environmental conditions and also reduction in the costs, geosynthetic cellular system (GCS) has been the focus of a significant amount of studies as a novel method to construct coastal protection structures which overcomes many of the disadvantages of pervious methods and employs the concept of reinforced soil. Nevertheless, there are many questions about performance of GCS in the construction and field scales. GCS is composed of a frame, geosynthetic membrane and soil. In this research, the behaviour of a 10 meter height GCS under gravity and wave loads has been investigated through numerical studies using finite element method with ABAQUS software. After generating numerical model of a 10×10×2 m GCS, allowable induced force and deformation tolerances of frame members and geosynthetic membranes for safe and favourable performance of GCS has been explained. Then, the effect of frame rigidity, frame members spacing, internal frame members removal and geosynthetic rigidity has been investigated by parametric studies. Finally, due to the results of parametric studies, some suggestions about optimization of geosynthetic cellular system and an optimized design of a 10×10×2 m GCS has been presented.
Keywords: Geosynthetic Cellular System, GCS, Wave loading, Numerical modeling, Finite element.
