José M Goicolea

• Dr
• Professor (Full) at Technical University of Madrid / UPM Universidad Politécnica de Madrid

During morphogenesis, embryonic tissues display fluid-like behavior with fluctuating strain rates. Digital cell lineages reconstructed from 4D images of developing zebrafish embryos are used to infer representative tissue deformation patterns and their association with developmental events. Finite deformation analysis along cell trajectories and un...

This work focuses on the dynamic analysis of road bridges under large microsimulated traffic flows, contributing an efficient dynamic analysis framework for future fatigue, comfort or driving safety studies in which realistic interactions between vehicles are considered. Different strategies to define the loading vector in the governing dynamic equ...

The increasing prevalence of high-speed trains necessitates robust analysis tools to ensure the safety and reliability of railway bridges. This paper presents a user-friendly software application designed for the dynamic analysis of railway bridges subjected to high-speed train loadings. Leveraging the semi-analytical modal method, the software off...

Bridges and viaducts are key infrastructure elements within high speed railway lines, for which dynamic actions due to traffic are one of the main actions for design of new structures or evaluation of existing ones. This paper describes techniques based on experimental measurements and numerical finite element models leading to efficient digital tw...

Unlike other civil structures, railway bridges commonly experience changes in their operating conditions, such as the introduction of new train models or higher traffic speeds. These changes can lead to the appearance of resonant effects that are not considered in the design stage. To suppress the large vibration of the railway bridges under the tr...

The use of multicellular Glass Fiber Reinforced Polymer (GFRP) deck panels in the rehabilitation and construction of bridges has increased over the last 30 years due to several benefits, such as: low maintenance cost, fast installation, corrosion resistance, and high strength-to-weight ratio. Due to the orthotropic nature of GFRP decks and their co...

Peru has around 7 360 prehispanic archaeological monuments [1] according to the Ministry of Culture of Peru. These structures, built with irregular shapes and variable configurations, are very complex to evaluate. Unfortunately, some of these constructions are in poor conservation state due to external factors such as earthquakes, soil settlements...

Magnetic Resonance Imaging (MRI) has been used as an effective tool for breast cancer evaluation due to its high sensitiveness to detect breast tumors. However, these MRIs are performed with the patient lying prone, while the tumor resection surgery is performed with the patient lying in supine position. The breast undergoes large deformations due...

Structural analysis of high-speed railway bridges is crucial to estimate the dynamic behaviour of the bridge due to external loads with extreme velocities. It is for this reason numerical simulations are performed to ensure the structural integrity of the bridge before actual construction. This research aims at analysing a short railway bridge of s...

The design of footbridges is usually strongly conditioned by the dynamic response of the structure. Thus, clear and accurate recommendations are needed by the designers to assess the vibration serviceability limit state. The previous versions of the Eurocodes addressed this issue in a very cursory manner. Nevertheless, several practical guidelines...

In the analysis of lightweight footbridges subjected to pedestrian actions, the vertical dynamic response is often overestimated when Human-Structure Interaction (HSI) is omitted. To account for the phenomenon, a Single- Degree of Freedom (DOF) system has been employed to represent a person. When dealing with a stream of people, this approach may l...

Passenger riding comfort is a major concern in railways, particularly in high-speed (HS) networks due its strict requirements. Both the track and vehicle conditions may influence the comfort experienced by the passengers, but other external factors may also do it. Among these factors, the effects caused by crosswinds stand out due to the high level...

A R T I C L E I N F O Keywords: Train running safety Train-track-bridge interaction High-speed railway bridges Wind loads Bridge lateral flexibility Track condition A B S T R A C T This paper studies the influence of different factors related to the structure-track-vehicle coupling system in the train's stability against crosswinds, namely the brid...

Due to the high strength-to-weight ratio of fibre reinforced polymers (FRPs), human-induced vibration problematic remains as a subject to be fully comprehended in order to extend the use of composites in Bridge Engineering. Thus, this paper studies an ultra-lightweight FRP footbridge, which presents excessive vertical vibrations when the fourth har...

Digital cell lineages reconstructed from 3D+time imaging data of the developing zebrafish embryo are used to uncover mechanical cues and their role in morphogenesis. A continuous approximation of cell displacements obtained from cell lineages is used to assess tissue deformation during gastrulation. At this stage, embryonic tissues display multi-sc...

Investigation of a global structural dynamics model of a cable-stayed structure subjected to the cable breakage event requires the determination of the Cable Breakage Equivalent Force with respect to time [CBEF(t)]. The CBEF(t) is an applied axial force to the structure from the stay cable considered to break which is reduced from before the breaka...

Regardless of the advances in simulation power of computers and material constitutive models, there is an agreement with the need of structural experimental testing. In particular, great effort has been made to understand the performance of structures under exceptional loads such as earthquakes or impacts. Several methods have been used in structur...

This paper presents the dynamic tests performed in two skew bridges of the Spanish high-speed railway network. The experimental tests involved ambient vibration tests, which allow the characterization of the natural frequencies, mode shapes and damping ratios of the structures, and dynamic tests under traffic loads, in order to evaluate the vertica...

Skew bridges induce inherently coupled bending and torsion response. The actual relevance of this coupling for the dynamic response under moving loads such as those arising in high-speed railways is not well known, introducing uncertainties unless costly three-dimensional dynamic models are used. In this work, models are developed based on beam the...

In recent years there has been an increased interest in the challenge of structural health monitoring and detection of bridge damage using the response of passing instrumented vehicles. Benefits of this indirect monitoring method over monitoring using direct measurement of bridge response (direct monitoring) include wider network coverage, lower co...

For bridges under seismic excitations, current design practices recommend to comply with the capacity protection principle for pile foundations. However, in cases such as elevated (or scoured) reinforced concrete (RC) pile-cap foundation typologies that are partially embedded, the piles may suffer large deflections under lateral loads, which makes...

Skew bridges induce inherently coupled bending and torsion response. The actual relevance of this coupling in the dynamic response of this relatively common type of deck (slab supported on multiple I-beams for double-track width) is not well known. This paper presents the study of the dynamic behaviour of a skew I-beam railway bridge of the Valenci...

Skew bridges are common in highways and railway lines when non perpendicular crossings are encountered. The structural effect of skewness is an additional torsion on the bridge deck which may have a considerable effect, making its analysis and design more complex In this paper, the dynamic vibration of skew bridges due to railway traffic including...

The presence of damage in a railway bridge alters its stiffness and consequently, its static and dynamic response to loading. The dynamic response of a railway bridge to loading produces a dynamic response in the passing vehicle, potentially enabling detection of the damage through analysis of the vehicle response. A method is proposed in this pape...

This paper describes two practical methodologies for modeling the collapse of reinforced concrete structures. They are validated with a real scale test of a two-floor structure which loses a bearing column. The objective is to achieve accurate simulations of collapse phenomena with moderate computational cost. Explicit finite element models are use...

The Eurocodes' specifications for the check of footbridges under human dynamic loads are being subjected to a profound revision in order to clarify the load models that should be used for vibration serviceability limit state assessment. Thus, this paper aims to compare the load models for vertical loads existing in different codes, focusing on thos...

Thermal Enhanced Oil Recovery (EOR) technologies activate Thermo-Hydro-Mechano-Chemical (THMC) processes in the reservoir. It is well known that quartz sand compressibility is dependent on stresses and boundary conditions. However, water saturation, composition, pH and temperature play a significant role on its response. Hence, the increase of inte...

Skew bridges are common in highways and railway lines when non perpendicular crossings are encountered. The structural effect of skewness is an additional torsion on the bridge deck which may have a considerable effect, making its analysis and design more complex. In this paper, an analytical model following 3D beam theory is firstly derived in ord...

A computational procedure is developed in the present paper, allowing the prediction of the ballasted track profile degradation under railway traffic loading. In this procedure, an integration of the short-term and long-term mechanical processes of track deterioration is taken into account, using a track degradation model. This degradation model is...

Digital cell lineages reconstructed from 3D+time imaging data provide unique information to unveil mechanical cues and their role in morphogenetic processes. Our methodology based on a kinematic analysis of cell lineage data reveals deformation patterns and quantitative morphogenetic landmarks for a new type of developmental table. The characterist...

This paper presents an investigation, using a numerical approach, of the dynamic response of the vehicle–track system as a function of the mechanical properties of high-speed rail track components. In particular, in this study the stiffness of the rail pad, ballast and sub-grade layer were considered as variable parameters. In order to assess their...

This paper presents an investigation, using a numerical approach, of the dynamic response of the vehicle-track system as a function of the mechanical properties of high-speed rail track components. In particular, in this study the stiffness of the rail pad, ballast and sub-grade layer were considered as variable parameters. In order to assess their...

Explosive phenomena on concrete structures have catastrophic effects in many instances despite its reduced occurrence. The civil buildings are usually not designed to withstand this type of dynamic load, so a methodology to analyze the structural response on blast loads is recommended. This paper studies the behavior of reinforced concrete frame st...

The wavelet transform and Lipschitz exponent perform well in detecting signal singularity. With the bridge crack damage modeled as rotational springs based on fracture mechanics, the deflection time history of the beam under the moving load is determined with a numerical method. The continuous wavelet transformation (CWT) is applied to the deflecti...

Material properties of soft fibrous tissues are highly conditioned by the hierarchical structure of this kind of composites. Collagen based tissues present, at decreasing length scales, a complex framework of fibres, fibrils, tropocollagen molecules and amino-acids. Understanding the mechanical behaviour at nano-scale level is critical to accuratel...

Underspanned suspension bridges are structures with important economical and aesthetic advantages, due to their high structural efficiency. However, road bridges of this typology are still uncommon because of limited knowledge about this structural system. In particular, there remains some uncertainty over the dynamic behaviour of these bridges, du...

The analysis of the running safety of railway vehicles on viaducts subject to strong lateral actions such as cross winds requires coupled nonlinear vehicle-bridge interaction models, capable to study extreme events. In this paper original models developed by the authors are described, based on finite elements for the structure, multibody and finite...

Civil buildings are not specifically designed to support blast loads, but it is important to take into account these potential scenarios because of their catastrophic effects, on persons and structures. A practical way to consider explosions on reinforced concrete structures is necessary. With this objective we propose a methodology to evaluate bla...

A fully coupled method for reproducing road vehicle–bridge dynamic interaction is presented in which finite element models are used for the structure, multibody dynamics models for the vehicles and interaction is represented by means of a contact with the linear penalty method. This model can reproduce structure, vehicle and interaction (lift-off)...

Among various damage identification methods, the Wavelet Packet Energy Curvature Difference (WPECD) method is an effective one. As a regret, most of the existing methods rely only on numerical simulation and are unverified via experiment, and moreover very few of them has been applied to practice. In the paper, the validity of WPECD in structural d...

In this work models with nonlinear wheel–rail contact forces are considered for analysing the dynamic interaction between high speed trains and bridges, in order to study dynamic effects both in the bridge and in the vehicles resulting from the coupling. Nonlinear contact models may be necessary for evaluating the stability and the safety of runnin...

Simplified vehicle models are usually employed when studying the dynamic effects of road traffic: quarter-car, one-dimensional vertical and two-dimensional longitudinal models are the most common. Furthermore, when complete three-dimensional vehicles are modelled, the differences between the road roughness under the four wheels at each time instant...

The evaluation of running safety of railway vehicles on viaducts requires the study of lateral dynamics for the coupled vehicle-bridge system. This includes the structural deformation of the bridge, the vehicle multibody dynamics, and the consideration of wheel to rail contact. In this work, a fully nonlinear coupled method for such study is presen...

Analysis for severe accidents has recently been added to the long list of requisites imposed on nuclear power plants. In this work we study the rationale and justiflcation for this type of analysis. Calculations for the structural response of the containment buildings can be performed on the computer using advanced nonlinear Finite Element codes. A...

The dynamic effects of high-speed trains on viaducts are important issues for the design of the structures, as well as for the consideration of safe running conditions for the trains. In this work we start by reviewing the relevance of some basic design aspects. The significance of impact factor envelopes for moving loads is considered first. Reson...

The vertical dynamic actions transmitted by railway vehicles to the ballasted track infrastructure are evaluated taking into account models with different degrees of detail. In particular, this matter has been studied from a two-dimensional finite-element model to a fully coupled three-dimensional multibody finite-element model. The vehicle and tra...

With the continuous raise of train speed and vehicle load, the extensive application of high performance materials, and the ever increasing span length of bridges, the problem of bridge vibrations becomes more prominent. This book contains the fundamental theory as well as numerical calculations and field experiments of many practical engineering p...

In this chapter, a critical review of methods for evaluating dynamic effects on high-speed railway bridges is performed, discussing the relevant features and practical design issues. Closed form solutions for the moving load problem are first discussed and compared to envelopes of impact factors in engineering codes. Moving load models provide the...

With the continuous raise of train speed and vehicle load, the extensive application of high performance materials, and the ever increasing span length of bridges, the problem of bridge vibrations becomes more prominent. This book contains the fundamental theory as well as numerical calculations and field experiments of many practical engineering p...

The threat of impact or explosive loads is regrettably a scenario to be taken into account in the design of lifeline or critical civilian buildings. These are often made of con-crete and not specifically designed for military threats. Numerical simulation of such cases may be undertaken with the aid of state of the art explicit dynamic codes, howev...

This work presents experiments and modelling aimed at characterising the passive mechanical behaviour of the human thoracic descending aorta. To this end, uniaxial tension and pressurisation tests on healthy samples corresponding to newborn, young and adult arteries are performed. Then, the tensile measurements are used to calibrate the material pa...

Palabras clave: Explosión, hormigón armado, losa reticulada, colapso progresivo Resumen. Los fenómenos de impacto y explosión sobre estructuras de hormigón tienen efectos en muchos casos catastróficos a pesar de su reducida probabilidad. Las estructuras de hormi-gón no suelen estar diseñadas para resistir este tipo de solicitaciones dinámicas. El a...

In long railway viaducts, lateral deformations due to traffic loads can be significant and the natural vibration frequencies can be very low. For these cases there is currently no methodology allowing to assess this situation and checking viaduct design for ride safety and passenger comfort requirements. This paper analyzes lateral deformations of...

In recent times, significant effort has been made to understand the mechanical behaviour of the arterial wall and how it is affected by the different vascular pathologies. However, to be able to interpret the results correctly, it is essential that the influence of other factors, such as aging or anisotropy, be understood. Knowledge of mechanical b...

Continuous increment of the speed of high speed trains entails the increment of kinetic energy of the trains. The main goal of this article is to study the coupled lateral behavior of vehicle-structure systems for high speed trains. Non linear finite element methods are used for structures whereas multibody dynamics methods are employed for vehicle...

Because it is easy to build and due to the relative simplicity of its structural analysis the hyperbolic paraboloid made of reinforced concrete is highly employed by the architect Félix Candela (1910-1997). In this article the structural behaviour of several such works is analyzed. Specifically two warped parallelograms [1], Los Manantiales restaur...

The objective of this work is to develop adequate and efficient models for calculation of vertical dynamic traffic load effects on railway track infrastructures, and applications for evaluating the comparative performance of ballast and slab track designs. The calculations are based on dynamic finite element models with direct time integration and...

High speed trains produce important dynamic actions on railway structures, which have been the subject of recent research and new provisions in design codes. The attention has focused mainly on vertical actions. The study of lateral dynamic effects for some bridges was the object of [4] whose recommendations were incorporated into the Eurocodes [2]...

El tráfico ferroviario genera cargas sobre los elementos de las estructuras de vía cuyo reparto depende de los parámetros de rigidez y masa de la vía y del vehículo. El estudio de dichas cargas es de capital importancia en las nuevas infraestructuras ferro-viarias de alta velocidad. En particular, resultan de especial interés los efectos dinámicos...

Los algoritmos de integración explícita en el tiempo proporcionan una metodología de solución para problemas dinámicos, que es común para diferencias finitas y elementos finitos. Los métodos explícitos originan algoritmos numéricos particularmente sencillos, lo que les dota de una gran potencia para su aplicación a problemas complejos. El interés v...

En este trabajo se presenta un estudio comparativo de diversos elementos formulados mediante de métodos variacionales mixtos de deformaciones supuestas y su aptitud para reproducir bandas de localización bajo estados tensionales simples. Se describen en primer lugar las condiciones necesarias para que la localización de deformaciones pueda tener lu...

Neste artigo, analisa-se numericamente o comportamento dinâmico de um sistema de via ferroviária em laje para tráfego de comboios de alta velocidade. De entre os vários tipos de via existentes seleccionou-se o sistema Rheda 2000, que consiste na última versão de via da família Rheda, tendo sido já aplicado em várias linhas europeias, tais como a HS...

The construction of new high speed railway infrastructure in many European countries is actually a great civil engineering effort. One of the main design issues is related to the fact that trains at speeds above 220 km/h may induce resonance effects in structures as bridges, subway frames, etc. In consequence, the design of such structures requires...

Bridges and viaducts for high speed trains are subject to demanding dynamic loads. In addition to the classical effect of the moving (single) load, much larger and potentially dangerous effects arise from dynamic resonance, for speeds above 220 km/h. The classical methods for evaluation of dynamic impact factors, reflected in the codes of practise...

High-speed railway lines are an important factor for modernisation of transport in Europe, specially in countries such as Spain with a historic deficit in infrastructure. This work will also discuss some issues related to dynamic effects in railway bridges. Firstly we review and comment analysis methods from a practical point of view. Following, is...

A relevant aspect in the design of structures under high speed train loads is the dynamical effects associated to the moving loads of the train. In this paper some calculation methods that are usual in the design of high speed train structures are considered. These methods are based on the integration of the motion equations, with or without consid...

The study of the lateral behaviour of railway bridges and vehicles is an important issue on bridges with low lateral stiffness, which has been defined by ERRI (1996) as those with lateral natural frequencies below 1.2 Hz. This limit applies to the deformation of the deck in one span, and was demonstrated to be a real issue on measurements and model...

The increasing design speed of the new high speed lines and the stringent requirements on track alignment parameters are leading to a sustained increase of the number of railway viaducts. The relevant standards impose limiting values on lateral vibrations. Both the Spanish and European standards establish a minimum value for the first natural frequ...

The dynamic behaviour of bridges strongly affects the infrastructure system of high-speed railways, and is a crucial factor in safety issues and passenger comfort. Dynamics of High-Speed Railway Bridges covers the latest research in this field, including: – Recently developed dynamic analysis techniques; – Train excitations; – Design issues for hig...

We discuss here recent results from several research programmes related to dynamic aspects and vibrations induced by high speed railway traffic, developed at the computational mechanics group, within the “Escuela de Ingenieros de Caminos” of the Technical University of Madrid. The first part of this work concerns the dynamic response of railway bri...

In this paper, we are interested in developing thermodynamically consistent constitutive equations for fiber-reinforced nonlinearly viscoelastic bodies, in particular for transversely isotropic nonlinearly viscoelastic solids, in isothermal processes. It follows from results in the theory of algebraic invariants that constitutive equations for such...

En este trabajo se caracteriza el comportamiento mecánico y la rotura de la pared de la aorta ascendente humana y su dependencia de distintas patologías. Para tal fin se realiza un análisis histológico y ensayos de tracción in-vitro sobre tejido aórtico de tres grupos de pacientes: Sanos (grupo de control), con válvula aórtica bicúspide y con el sí...

Stress and deformation in arterial wall tissue are factors which may influence significantly its response and evolution. In this work we develop models based on nonlinear elasticity and finite element numerical solutions for the mechanical behaviour and the remodelling of the soft tissue of arteries, including anisotropy induced by the presence of...

In this work the finite element simulation of the simple tension test in metals is discussed. Results from Bridgman as well as experimental measurements obtained with aluminium specimens are compared with numerical simulations. The computational analyses carried out consider several finite element technologies as the Q1/P0 mixed formulation, and va...

Flexible multibody systems (MBS) appear in a number of mechanical applications, in which the model must consider the deformation of some or all of the bodies. A classical method for considering flexibility has been the floating frame technique (25), generally limited to small strains. A more general approach based on inertial coordinates may be for...

Introducción y objetivos. Los factores locales pueden influir en la proliferación neointimal tras la implantación de stents convencionales. En este estudio se evalúa la relación entre la tensión de cizallamiento y la pérdida luminal tras la colocación de stents en las arterias coronarias, utilizando la combinación de angiografía, ecografía intravas...

Local factors may influence neointimal proliferation following conventional stent implantation. In this study, the relationship between wall shear stress and luminal loss after coronary stenting was assessed using a combination of angiography, intravascular ultrasound, and computational fluid dynamics. Seven patients with de novo right coronary les...

Bridges and viaducts for high speed railways are subject to significant dynamic actions. To the classical effect of a (single) moving load one has to add the resonant behaviour which occurs for train speeds above 220 km/h. The provisions for dynamic effects foreseen in existing classical design codes do not cover this possibility of resonance. The...

Mechanical simulation of tissue in the walls of coronary arteries may provide valuable quantitative information for medical practice, such as understanding the evolution of stenosis, angioplasty processes, and placement of stents and possible restenosis. The material constitutive models which represent the mechanical response to strain are highly n...