Abstracts Archive

The standard Newton–Raphson scheme suffers from divergence problems due to softening, negative tangent stiffness, bifurcations or snap-back when modelling fracture of quasi-brittle materials, such as masonry and concrete. Convergence can be achieved by applying sequentially linear analysis (SLA) i...

Since 1986, earthquakes have occurred in East Groningen, but most buildings made of unreinforced masonry have not been designed for Earthquakes, which must now withstand magnitude 4 earthquakes. This has created an urgent need to assess large amounts of buildings in a fast but reliable manner. The o...

One-dimensional periodic media have been extensively studied in the past, on the one hand to determine the dispersion curves linking the frequencies to the wavenumbers and on the other hand for the calculation of bounded periodic structures. In the latter case, effective methods have been obtained, ...

In explicit dynamic simulations, an estimation of the critical time step size is necessary to ensure a stable computation. A direct computation of the critical time step by solving the corresponding eigenvalue problem is too time-consuming and requires the stiffness matrix, which is usually not calc...

Permanent residual drift is the structural response parameter most easily collected during post-earthquake assessments. Its importance has been proven by many past earthquakes where it has been used to determine the demolition of a number of structures after their residual drifts had exceeded certai...

Condition assessment, model updating, and basic studies of large and complex structures subjected to static and dynamic loadings necessitate establishing a reasonably low order model to enhance computational efficiency. An essential requirement for the development of a low-order model is to preserve...

When considering industrial models for aircraft braking systems, the number of degrees of freedom (DoF) limits the type of analysis that can be performed. It is therefore sometimes necessary to simplify the model by introducing some hypotheses ; this allows to have satisfactory simulation times. How...

The dynamical models of many complex engineering systems, such as Finite Element (FE) models of structural dynamics systems, consist of a (very) large number of degrees of freedom (DOF). For such systems, model order reduction (MOR) is required to make simulation and analysis computationally feasibl...

The Applied Element Method (AEM) has been used extensively through the past decade for doing non-linear analysis of structures subjected to extreme loading conditions like blast, progressive collapse, seismic assessment for new and existing buildings, wind analysis, impact analysis and fire analysis...

The influence of uncertainties arising from material properties and manufacture in engineering structures leads to increasing variation in the response characteristics with frequency. This is in combination with the likelihood that within a complex system, localised nonlinearities can also present t...

Advancements in computer sciences and technology allow for implementation of detailed numerical models of a system such as the Finite Element (FE) or Multibody Dynamics (MBD) models. Complex mechanical systems can easily be modelled in detail, yielding accurate results. This opportunity provided by ...

The complex structure and material property of a cable, particularly the stick-slip issue among its components pose the challenge for the bending analysis of submarine power cables. The calculation time and convergence problem of a full model makes the simulation unpractical during the design phase....

Rank deficiency of the dynamic stiffness matrix at a given frequency is an indicator of resonance. In order to achieve resonance at several eigenfrequencies, the sum of ranks of the dynamic stiffness matrix at these frequencies can be used as a heuristic optimization objective. This objective avoids...

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 ...

MultiFEBE is an open-source solver that implements different Boundary-Element and Finite-Element models and strategies to tackle static and time-harmonic problems within the field of computational mechanics. Even though the code is able to address single-domain problems through both the Boundary Ele...

Monitoring the health and working conditions of critical structures and machines can prevent failures and arrange for effective maintenance schedules. Access to vibration data from states with damages is valuable in order to train models that can perform explicit classification of faults in later st...

Steel Moment Frames (SMFs) are among the most popular lateral load-resisting systems, especially in seismic zones. Due to their popularity, these systems have been studied extensively over the last decades. With the advances in computational capabilities, sophisticated mathematical models have been ...

Manufacturing and metal cutting processes have a rich body of research on the nature and effects emerging from structural dynamics phenomena. It is well established that excessive (and uncontrolled) vibrations in machining operations hinder productivity and quality of the components being made. In t...

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...

This paper deals with data-driven-based regression models for the estimation of maximum inter-storey drift demands (MIDR) in multi-story cross-laminated timber (CLT) buildings. Buildings with a different number of storeys (6, 8, 12, 16, and 20) are defined to cover medium- to high-rise CLT buildings...

The use of equivalent mechanical models, of the mass-spring or pendulum type, to represent the forces due to the sloshing of liquids in tanks on the dynamics of the main structure is a method still widely used today in many industrial fields (aeronautics, space, road transport, etc.). The determinat...

Models of multibody mechanical systems subject to motion constraints are employed in several areas of large engineering importance, like automotive, railway, marine and aerospace structures. A better understanding of the dynamics of these models leads to better designs. However, investigation of the...

Machines are typically an interconnection of components, i.e., they are assemblies. To analyze the dynamics of these assemblies, their components are generally modeled by large structural, finite element models. The large order of these component models, and of their interconnection, necessitates th...

Homogenization of periodic media, which are characterized by a modular repetition along one direction of a unitary cell, can be conveniently used to model beam-like structures as equivalent continua. This is the case of lattice structures, as well as multi-story tower-buildings. As regards the latte...

Scalar constant coefficients are generally found in conventional integration methods and it has been shown that there is no conventional integration method that can have explicit formulation and unconditional stability simultaneously. Alternatively, a novel type of solution methods is proposed for s...

A class of underdetermined problems that has received much attention is that where the sparsest solution is assumed to be the most likely. A brute force search for this solution is conceptually straightforward but, except for small problems, computationally prohibitive. Surrogates that allow for eff...