A three-dimensional finite element model was developed to investigate dynamic response of track-embankment-ground system subjected to moving loads caused by high speed trains. The track-embankment-ground systems such as the sleepers, the ballast, the embankment, and the ground are represented by 8-noded solid elements. The infinite elements are used to represent the infinite boundary condition ...

To study the evolution of mechanical properties steel rebars in China Railway Track System Type II (CRTS II) ballastless track–bridge structural system under repeated train loads, a 1/4 scale three-span slab track simple-supported bridge specimen was manufactured and subjected to multistage fatigue test with 18 million cycles. The experimental results show that strain amplitude bar changes prop...

The winter climate of Europe and the Mediterranean is dominated by the weather systems of the mid-latitude storm tracks. The behaviour of the storm tracks is highly variable, particularly in the eastern North Atlantic, and has a profound impact on the hydroclimate of the Mediterranean region. A deeper understanding of the storm tracks and the factors that drive them is therefore crucial for int...

Abstract The probability of a train running over bridge when an earthquake occurs is increasing with the total mileage China’s high-speed railway network expanding. To study this issue, three-dimensional train-track-bridge dynamic interaction system subjected to seismic excitations established based on commercial mathematical software. Besides, set motion equations are derived according multibo...

Large-scale model tests were established at a scale of 1/5 using 7 m deep tank with cross-sectional dimension 5 × 4 m, to study the vibration response characteristics ballastless track, embankment, and X-section piled raft foundation under cyclic axial load, including displacement, velocity, dynamic soil, pile stress. Cyclic loading can be achieved by controlling frequency cycles through servo ...

At two trench segments below the Andes, the Nazca Plate is subducting sub-horizontally over ∼200-300 km, thought to result from a combination of buoyant oceanic-plateau subduction and hydrodynamic mantle-wedge suction. Whether the actual conditions for both processes to work in concert existed is uncertain. Here we infer from a tectonic reconstruction of the Andes constructed in a mantle refere...