Abstracts Archive

Dynamic responses of steel bolts anchored in concrete subject to cyclic loads are complex: qualitative physical attributes include pinching, displacement ratcheting and force-intercept. In fact, these attributes vary with time, involving uncertainties that can lead to different failure patterns. Thi...

The process of Finite Element (FE) modelling is often associated with uncertainties which necessitates its updating using measured data. Updating dynamical model has a considerable importance in Structural Health Monitoring (SHM), estimating the structural responses, and structural control applicati...

New technical developments and industrialisation of floating wind turbines will allow the construction of wind energy farms in regions with larger water depths and high-energy potential. This increase in renewable capacity will require the adoption of energy storage solutions to overcome the intermi...

This paper presents a fast and reliable model, for analysing the effect of localised damage on waveguides and obtaining all the range of dispersion curves for wave propagation. The model is based on modelling a finite section of the waveguide using the Finite Element Method (FEM) and applying the Fl...

Past earthquakes and contemporary research reveal that dynamic soil-structure interaction (SSI) could significantly alter the structural response of a building during an earthquake. These effects are functions of several parameters, including structural system, foundation type and geotechnical chara...

Nonlinearities significantly limit the size and complexity of numerical models. The present work presents a general method to simulate kinematic nonlinear structures more efficiently. An efficient basis formulation that increases the number of basis vectors without increasing the number of unknown b...

Nowadays, the society is highly dependent on railways, since it is the most effective mode of transportation that has the lowest greenhouse gas emissions in the transports sector. Because of that, there has been an increase in rail transport, with great dependence on transport infrastructure such as...

The dynamic response of thin-walled slender tubes is dominated by noisy flexural modes. One topic of interest in research today is the use of acoustic metamaterials to reduce noise emissions from structures. These aspects are combined in the present work in which a solution for reducing the noise em...

Deterioration of bridge infrastructure is a serious concern to transport and government agencies as it declines serviceability and reliability of bridges and jeopardizes public safety. Bridge infrastructure, in addition to serving the crucial function of connecting highways, is the most vulnerable c...

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...

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...

Damping enhancement of slender beam-like structures continues be an underlying motive behind current interests of many engineering disciplines, including aerospace structures. In particular, with the increased focus surrounding High Aspect Ratio Wings (HARWs) owing to their potential in reducing ind...

Among the load scenarios considered for the serviceability assessment of human-induced footbridge vibrations, is that of the transient action of a single pedestrian or a small group of pedestrians. Although such action is stochastic due to the variability of gait parameters, Standards and Guidelines...

Recent studies carried out in the literature have shown that the mechanical properties of bioinspired periodic composite materials can be strongly influenced by finite deformations effects leading to highly nonlinear static and dynamic behaviors at multiple length scales. For instance, microscopic a...

Current design methods for vibration serviceability assessment of pedestrian structures are generally based on footfall loading models representing walking over rigid level surfaces rather than oscillating surfaces that might affect the walking pattern. It is largely unknown how footstep forces woul...

Submarine power cables are considered lifelines in wind farm engineering, playing a key role in transporting electric current produced by wind turbines or wave converter. Cables inevitably confront combined loadings in deep-sea areas, affecting the integrity and safety during their installation and ...

In this work, modelling of non-smooth dynamics of an Anti Stick–Slip Tool (ASST) is carried out. ASST is used to protect a drill-string from a severe form of torsional vibrations known as stick-slip. A drill string is an essential component of any downhole drilling process and it exhibits a highly...

Structural optimization is the process of identifying the optimal set of design parameters for a structural system. Optimization technique provides an effective approach for rationally improving engineering structural design, both for structural system with deterministic and uncertain parameters. Mo...

From the literature as well as from relevant standards, recommendations for the numerical modelling of soil-structure interaction problems involving seismic actions are well known, e.g. ASCE/SEI 4-16. For human-induced excitations very little specific guidance has been published in the past. However...

Base isolation is an established method of limiting the transmission of traffic-induced vibration into buildings. Despite this, the available design guidance is limited, and significant questions remain concerning how the vibration isolation performance may be optimised for a particular building. Re...

Buildings subject to natural hazards should be considered as a system composed of structural elements and non-structural components. This is crucial for resilience assessments where the damage of both structural and nonstructural components can lead to loss of functionality and affect robustness. Mo...

Masonry construction has been practiced for thousands of years, being an important part of the world's cultural heritage, containing sociological, economic, cultural and political elements of the place where it is inserted, physically offering us the opportunity to research and learn about the past....

Current standards like ISO 14837-32:2015 or DIN EN 1998-1/NA:2021 allow for using correlations between the results of in-situ soil penetration tests and shear wave velocity (or shear modulus) to determine soil properties to be used in dynamic analyses. While the ISO standard even provides some recom...

Prediction of aeroelastic stability for large horizontal axis wind turbines is a key step in the design process to ensure structural safety against catastrophic failures. Historically, flutter has not been a major issue to interrupt the safe operation of wind turbines, but the trend of going bigger ...

Ground motion induced by human activities related to construction has been a classical topic of great interest. Damage to nearby structures due to settlement, disturbance of occupants, jeopardy of serviceability and structural integrity are common effects of excessive vibrations. Pile driving is one...

Within the structural health monitoring (SHM) field, consistent research efforts have been invested in developing automatic vibration-based indirect methodologies for inspecting existing heritage conditions. Current trends are mainly focused on output-only automatic operational modal analysis (AOMA)...

ABSTRACT Nowadays, transport policy is decisively influenced by environmental concerns, with railways expected to play a key role in achieving climate neutrality by 2050, according to the Green Deal proposed by the European Commission. The increase in railway traffic will require the expansion of th...

High-speed railway networks in Europe include thousands of bridges, which constitute potential points of failure. Presently, the assessment of running safety is reflected in the Eurocode in the form of deck acceleration limits. However, this indirect metric does not relate unambiguously to an evalua...

Statistical Energy Analysis (SEA) techniques have been largely employed to model vibroacoustic systems as it simplifies the equations of motion of the system optimising the computing time, a useful feature to analyse random ensembles. However, the approach is limited to linear systems. Modelling vib...

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...