چكيده به لاتين
fastening, as one of the most important components of pavement, plays an important role in the operation of railway lines and The use of various fastening systems has become increasingly common in recent years. The main task of the fastening systems, is Connecting the rail to the sleeper, to transfer the forces coming from the rail to the sleeper, and to resist vertical, lateral, horizontal, and rail reversal. Fasteners are just a part of the railway pavement components, But one of their main tasks is to keep the rails longitudinal and control the creep of the rails. Creep on the railway is a condition in which the rails move in the longitudinal direction and in the direction of the locomotive's movement. Creep is present in all railways, and for seam lines it is usually between 6 and 160 mm. Rail creep depends on various factors such as traffic factors (acceleration and braking), temperature variations, topography, and fixed structures such as bridges.
In this thesis, the main objective of formulating a longitudinal resistance test and its numerical modeling is to investigate the experimental and numerical factors affecting creep resistance of rail, the different elastic fastening systems of Vossloh and Pandrol, the effects of different components such as pad, insulite and the comparison of different modes that done by me at the Railway Pavement Laboratory of Iran University of Science and Technology. In this thesis, after introducing different types of fastening systems and their characteristics, an overview of the technical literature on longitudinal and creep resistance is discussed. Afterwards, the formulation of the experiment, the modeling, the test and the interpretation of the results are discussed and finally the conclusions are summarized.
