Abstracts Archive

The main purpose of the present study is to investigate the effects of damage phenomena on the structural behaviour of Reinforced Concrete (RC) bridges and related identification procedure. To this end, an effective FE numerical model able to analyse the structural response, in presence of different...

In this talk we discuss the aspects of non-material modelling of a flexible structure moving between two qualitatively different domains with a configurational force, acting at the boundary. In particular, we consider the dynamics of a flexible rod, partially inserted into an inclined rigid channel ...

This work addresses the dynamical response of slender structures crossed by systems of equally spaced transverse forces which travel at constant velocity along the main length of the structure. The study of the dynamic behavior of elastic structures acted upon by moving loads is a topic of great imp...

The parametric instability of a moving mass / oscillator has been studied in literature for a continuous periodic inhomogeneous Euler-Bernoulli beam, a periodic discretely supported string, and a periodic discretely supported Timoshenko beam. It was found that the parametric instability was caused b...

As a short bridge is subject to a high speed train traveling over it with (sub-)resonance speeds, the dynamic interactions between the supporting bridge and moving train plays an important role in estimating the resonance speeds of the bridge for its coupling effects may result in the bridge respons...

Railway tracks experience differential settlement due to the stresses induced during train-track interaction. The characteristics of this vertical profile are a key parameter when scheduling track maintenance operations. Regression or machine learning can be used to extrapolate historical changes in...

Canals delimited with masonry quay walls are integral elements of many Dutch cities. Historically built to enable the efficient transportation of goods, such infrastructure today also gives these cities their historical and monumental character. In recent years, many quay walls in the city of Amster...

The railway transition zone, where the track transitions from a ballasted track to a slab track, is a crucial area that can experience amplified dynamic responses. This work aims to develop a deeper insight into the mechanisms leading to the amplified dynamic response in railway transition zones. Th...

The dynamic analysis of continuous beams crossed by moving loads is a topic of great interest in the field of structural engineering. Indeed, the transversal deflection and stresses due to moving loads could be considerably higher than those observed under static loads. Usually, the damping of beams...

Moving load problems are ubiquitous in engineering, where an engineering structure is subjected to a moving point mass source, for instance, a vehicle moving on a bridge, a train moving on railway tracks, and a pantograph moving on a catenary, among others. The moving point source induces forces on ...

We study the dynamics of one-dimensional slender structures such as beams and arches carrying a moving load. Nonlinear, geometrically-exact rod theory is used to model the structure, which is allowed to undergo arbitrary three-dimensional flexural and twisting deformations. The equations of motion a...

Irregular interfaces between soil layers exist in the natural foundation. This paper proposes a thin layer method to calculate the three-dimensional (3D) ground vibration of layered soils with irregular interfaces by a moving load. Based on the double Fourier transform, the system governing equation...

The issue of the environmental vibration caused by subway trains has become a hot topic in both academic and engineering communities. An accurate train-track-tunnel-soil interaction model plays a decisive role in the prediction of subway train-induced environmental vibration, which is conducive to e...

Ballasted track has been extensively employed in railway lines, even in high-speed railways. In recent years, with the increasing of train speed, the vibrations of the railway track become much more intense, which significantly accelerates the track deterioration, particularly leading to the excessi...

Moving load problems have attracted the scientific community for many years since the first railway lines were build. Numerical assessment of the dynamic behaviour of structures subject to moving loads are under huge development, as are other approaches, to mention e.g. semianalytical methods and dy...

Railway transportation has received increasing attention recently, especially in the context of climate change due to its capability of running fully on electricity, which can be generated from green sources. With this increasing demand on railway transport, the previously considered acceptable dete...

The serviceability of a high-speed railway track depends on the limitation of the dynamic amplifications that occur for load velocities near the critical one, that is, it depends on the ability of its substructure to dissipate the energy transmitted by the transit of the moving loads. This substruct...

Transition zones are critical in high-speed railways because of the concentrated occurrence of track and substructure degradations. Even if the rail geometry irregularity has been well controlled by intensive maintenances, amplification of dynamic responses can be commonly found at the various subst...