The Padma Multipurpose Bridge Design Project comprises a new fixed crossing of the Padma River in Bangladesh, which will consist of a new main bridge approximately 6.15km long with spans crossing the Padma River. Viaduct spans on both sides of the Padma River support both the highway and railway traffic and lead this traffic onto the upper and lower levels of the main bridge. The length of the ...

The construction of undercrossing roads often has an adverse effect on the upper existing railway line, and can cause uneven subsidence crossed section. In response to influence new road high-speed bridge, a highway passing under bridge was taken as research object. Based FLAC3D finite difference software, computational model established analyze structural deformation bridge. results show that ...

This paper presents the structural health assessment of a railway ancient masonry arch bridge located in Bologna, Italy. A three-dimensional finite element model of the entire bridge, tuned on in situ experimental tests, has been used for the assessment. In particular, the finite element model has been employed to evaluate the structural health of the bridge both in its actual state and in the ...

Based on the theory of vehicle track coupling dynamics, the local vibration of the high-speed railway box girder is analyzed by the Finite Element Method and the model is simulated with the solid elements. Through the study of vibration characteristics of the selected 6 sensitive points, the local vibrations in different parts of the box girder are figured out. It is compared the response of th...

In order to study the influence of an integration time step on dynamic calculation a vehicle-track-bridge under high-speed railway, (VTB) coupled model is established. The accuracy and stability different speeds or track regularity states studied. irregularity further analyzed by using spectral characteristic sensitive wavelength. According results, disparity among effect VTB at very small. Hig...

During the long-term operation of an urban railway viaduct, it is subjected to multiple cyclic loads caused by movement a vehicle. As result, fatigue life bridge should be fully considered during design process. Furthermore, structure will subject environmental corrosion for extended period time, resulting in concrete carbonization and reinforcement corrosion, which aggravates structure’s damag...

Orthogonal frequency division multiplexing (OFDM) is a multi-carrier digital modulation technique. It’s likely to be used in next generation high-speed railway communication system. When OFDM is used in the communication of high-speed railway user s, Doppler frequency shift will become an important technical barrier, because OFDM is sensitive to frequency offset. Especially in high-speed moveme...

Train induced vibrations are a major environmental concern both in Europe and China. Besides the effect of vibrations due to passenger and freight trains and subways at relatively low speed, the study of the vibrational impact of high speed trains is of high interest. In Belgium, for example, new high speed train lines connect Brussels with Paris and London, while extensions to Amsterdam and Co...