Auflistung nach Autor "Giannakos, K."
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Actions on a railway track, due to an isolated defect
Giannakos, K. (2014)The rail running table imposes to the vehicle a forced vibration. It is not smooth but instead it comprises a lot of faults that give to the rail running table a random surface. Furthermore under the primary suspension ... -
Actions on railway track panel and ballast-behavior of the Hellenic limestone ballast
Giannakos, K.; Loizos, A. (2009)In this paper a new method is presented for the estimation of actions on sleepers and the pressures that develop under the seating surface of the sleeper and are transmitted on the ballast. Results from the tests performed ... -
Ballast stressing on a railway track and the behaviour of limestone ballast
Giannakos, K.; Loizos, A. (2008)In this paper the results of the tests performed on the ballast used in the Greek network are presented. The tests were conducted in laboratories in France and Greece, and led to a change in the Greek technical specifications. ... -
Comparison of magnitude of actions on track in high-speed and heavy-haul railroads
Giannakos, K. (2012)In modern high-speed railways the necessity for achieving low life-cycle costs has led to a well-compacted-almost undeflected-substructure. Applications of excellent quality substructure are encountered in the French network ... -
Comparison of Magnitude of Actions on Track in High-Speed and Heavy-Haul Railroads Influence of Resilient Fastenings
Giannakos, K. (2012)In modern high-speed railways the necessity for achieving low life-cycle costs has led to a well-compacted almost undeflected substructure. Applications of excellent quality substructure are encountered in the French network ... -
Design loads on railway substructure-comparative parametric investigation on the influence of fastening stiffness (European and Japanese)
Giannakos, K. (2012)The existing international bibliography-German, French, AREMA methods- includes various methods for a realistic estimation of loads on track superstructure and the reactions/actions on the sleepers. The magnitude of loads ... -
Design methodology of slab track systems
Giannakos, K.; Tsoukantas, S. (2008)The substantial ballast wear in high-speed lines has led to the adoption of the slab track. In this paper a methodology for the calculation of the actions applied on the slab track and the design philosophy of such systems ... -
Evaluation of actions on concrete sleepers as design loads - influence of fastenings
Giannakos, K.; Loizos, A. (2010)In Greece, during the 1980s, 60% of the twin-block concrete sleepers designed for lines of mixed traffic and a maximum speed of 200km/h, which were laid on a track with a maximum operational speed of 140km/h, presented ... -
High-speed railway infrastructure: recent developments and performance
Giannakos, K. (2010) -
Influence of a bent or battered joint or welding on the dynamic loads due to the non-suspended masses of railway vehicles
Giannakos, K. (2014)Train circulation is a random dynamic phenomenon and, according to the different frequencies of the loads it imposes, there exists the corresponding response of track superstructure. Random dynamic phenomena are generally ... -
Influence of rail pad stiffness on track stressing, life-cycle and noise emission
Giannakos, K. (2010)In this paper the results for the influence of the rail pad stiffness on the Railway Track stressing and its Life-Cycle is presented, as derived from a research program performed in Greece due to the appearance of extended ... -
Influence of the track's stiffness coefficient on the acting loads, deflection and dimensioning of slab track
Giannakos, K. (2011)Slab Track, as all railway structures, should provide secure train running and smooth passenger ride. Moreover, it should present sufficient vertical elasticity to distribute the loads to the adjacent fixing points of the ... -
Loads on Track, Ballast Fouling, and Life Cycle under Dynamic Loading in Railways
Giannakos, K. (2010)In this paper a new method is presented for the estimation of actions on sleepers and the pressures that develop under the seating surface of the sleeper and are transmitted on the ballast. Results from laboratory tests ... -
Reduced service life of concrete sleepers due to inadequate design
Giannakos, K. (2010)During the 1980's, the twin-block concrete sleepers/ties -designed and laid in railway lines with maximum operational speed of 200 km/h in France- which were laid on a track with maximum operational speed of 140 km/h in ... -
Theoretical calculation of the track mass in the motion of unsprung masses in relation to track dynamic stiffness and damping
Giannakos, K. (2010)In order to calculate the load on the track in the position of a sleeper at the time when an isolated axle of the vehicle passes, it is necessary to determine the mass of the railway track that participates in the movement ... -
Track defects and the dynamic loads due to non-suspended masses of railway vehicles
Giannakos, K. (2013)The motion of a railway vehicle on the rail running table is a forced oscillation with a forcing excitation (force), and damping expressed by a random, non-periodic function. The motion is described by formulas and it is ... -
Track Maintenance of Heavy Haul Railways with Resilient Versus Stiff Fastenings
Giannakos, K. (2011)The average stress on the tie ballast contact surface is used to examine the stress on the seating of the track. According to AASHTO testing for road construction, increasing the pressure on the ballast by 10% results in ... -
Transient loads/ actions on railway track: The case of a deformed, bent joint or welding
Giannakos, K. (2014)The railway track is modeled as a continuous beam on elastic support. Train circulation is a random dynamic phenomenon and, according to the different frequencies of the loads it im-poses, there exists the corresponding ... -
The use of strain attenuating tie pads and its influence on the rail seat load in heavy-haul railroads
Giannakos, K. (2010)In Greece, during the 1980's, 60% of the twin-block concrete ties designed for 200 km/h, which were laid on a track with maximum operational speed of 140 km/h, presented serious cracks. The existing theories, in the French, ...