Rolando Chacón

Rolando Chacón
Universitat Politècnica de Catalunya | UPC · Department of Civil and Environmental Engineering (DECA)

Ph.D

About

88
Publications
16,437
Reads
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602
Citations
Citations since 2016
59 Research Items
462 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Additional affiliations
October 2009 - present
Universitat Politècnica de Catalunya
Position
  • Professor (Associate)

Publications

Publications (88)
Article
European design rules EN1993-1-5 allows the usage of FE-Analyses as reliable tools in the verification of limit states of plated structures. Throughout the modelling of these structures. certain initial conditions must be assumed. Consequently, engineering judgment is needed to some degree. This paper presents an assessment of the influence of thes...
Article
In this paper, an experimental test performed on a hybrid steel plate girder was subjected to concentrated loads at the end of an unstiffened panel is presented. This load was intended to produce a typical reaction of the piers while launching steel girders in bridges. In this test, strain measurements were taken with conventional pre-wired gauges...
Article
In this paper, an experimental programme of six steel plate girders subjected to patch loading as well as results of forty eight numerically-tested prototypes are presented. Results of ultimate load capacity as well as structural responses from these girders are provided. In addition, experimental and numerical values of ultimate load capacity are...
Article
Full-text available
Terrestrial Laser Scanners (TLS) provide manifold possibilities in construction sites. In buildings assembled with steel frames, the “as-built” configuration of the structure can be virtualized by means of TLS measurements in the form of digital 3D point cloud data. This paper presents an integration of procedures related to the reproduction of rea...
Article
In this paper, a set of digital artifacts related to simple examples of structural engineering are presented. The artifacts are real-time applications and visualizations of typical problems students from the architecture, engineering, and construction (AEC) schools are acquainted with. The real-time nature of the examples allow a high level of inte...
Article
Full-text available
Dissipative zones buildings, in which plastic hinges or plastic strains occur during, for instance, seismic episodes, have been studied for many different types of steel fuse elements. Stainless steel (SS), has attracted attention in this regard due to its high ductility and further studies are needed to determine its performance and usefulness as...
Article
A composite bridge located in the Metropolitan Area of Barcelona represents one of the sites for demonstrating the capabilities of digital twins on maintenance of built assets. Digital twins can be deemed to as digital living replica of the physical one that provides real time information throughout adequate connectivity (sensors, images, remote se...
Article
This paper proposes a digitally twinned experimental analysis of a scale‐reduced laboratory‐sized steel cable net subjected to vertical loading. The test is aimed at establishing automated pipelines of information and analysis between the measurements (displacements of nodes) and the numerical model of the cable net, which are seamlessly interconne...
Conference Paper
This paper shows the developments on the digital twinning of a set of new High speed Railway bridges located in South Western Spain. The aim of this digitization is the generation of a twin-driven maintenance planning. This research is performed within the frame of a H2020 European project called ASHVIN, related to the use of Digital Twins for Desi...
Conference Paper
This paper depicts the deployment of Ground-Based Interferometer Synthetic Aperture Radars for obtaining displacements and accelerations of El Tajo and Almonte Viaducts during their routine load tests. These Viaducts belong to the Highspeed Railway Network between Madrid and Badajoz, which represents a strategic infrastructure in Spain. Both Viaduc...
Conference Paper
Structural Health Monitoring (SHM) of bridges is getting special attention of infrastructure management agencies, due to its success in minimizing maintenance costs. The acquisition of structural behaviour data and its analysis to assess the structural condition are critical tasks of SHM. In this paper both are addressed. A cost - effective measure...
Conference Paper
Full-text available
The construction industry will have to presentcompelling solutionsto achieve the UN societal development goals (SDG).A digital twin has the potential to revolutionize the design, construction, and performance of civil infrastructureassets across the environment.This paper proposes an ontology mappingthe physical objects with required attributes aim...
Article
This paper aims at investigating the patch loading resistance of steel plate girders with triangular cell flanges. This geometrical arrangement increases considerably the resistance of the web plates when subjected to concentrated loading. In this study, the patch loading resistance is studied by means of GMNI- analyses considering large displaceme...
Article
This paper depicts a case study that shows an open‐source Terrestrial Laser Scanner (TLS) for use on the virtualization of simple yet precise geometrical entities in AEC classrooms. For bringing this technology to AEC classrooms, an open‐source TLS was developed. The physical model was built using digital fabrication, its connectivity was establish...
Article
In this paper, an experimental program on cyclic loading of austenitic stainless steel specimens is presented. The program encompasses a series of forty specimens subjected both cyclic (low and extremely low) and arbitrary loading (following certain rules). These protocols include companion, multiple-step and a set of arbitrary earthquake-like stra...
Conference Paper
In Engineering, traditional approaches for teaching Calculus include a sequential development of proofs and exercises related to functions, differentiation, integration and partial differential equations. Often, in the specific case of functions and differentiation, lessons include programming in different coding languages as well. In this paper, a...
Article
Full-text available
This article describes the outcomes of the development of the project MATES to STEAM. The project is aimed at integrating Construction 4.0 content to a recently started new degree on Technologies on Civil Engineering. This integration is underpinned by the creation of STEAM-rich activities that can complement such degree. The philosophical design o...
Article
An experimental development of systems for tests on stainless steel members and frames aimed at providing interoperability is presented. In the context of the project PINOX, tests on stainless steel members and frames have been conducted and provided with traditional measurement techniques. In addition, systems aimed at providing interoperable data...
Article
Vertical links are dissipative devices in form of beam-column segments that are included in eccentrically braced frames (EBF). Studies related to different configurations of links have been presented for carbon steel elements. Moreover, stainless steel is a nonlinear metallic material with particular appeal for its structural use due to a considera...
Article
This paper presents an implementation of structural optimization algorithms for the design of horizontal links of Eccentrically Braced Frames (EBFs) when subjected to monotonic shear loading. The objective is to study optimized geometries that open new design paths for these types of elements. With the advent of new additive manufacturing technique...
Conference Paper
The Direct Analysis Method is the primary method for the stability design of carbon steel frames in AISC 360-16. The method refers to a second-order elastic analysis performed on members whose tangent stiffness moduli are reduced using adequate factors. The aim of this research is to provide a set of stiffness reduction factor formulation for the s...
Article
In this paper, flexural stiffness reduction factor formulations, applicable to stainless steel members with compact cold-formed square and rectangular hollow section (SHS and RHS), are extended to account for local buckling effects and initial localized imperfection (ω). Local buckling effects and the influence of ω are accounted for by means of re...
Article
This paper depicts a set of virtual reality (VR) and augmented reality (AR) applications conceived for the enrichment of laboratory experiences within the field of structural engineering. The experimental program corresponds to the study of beams, columns, and frames of austenitic stainless steel subjected to different types of static loading. The...
Article
This paper focuses on the development of beam-column flexural stiffness reduction factor (τMN) applicable to the in-plane stability design of stainless steel beam-columns and frames with compact cold-formed square and rectangular hollow sections. The proposed τMN accounts for the deleterious influence of material non-linearity, residual stresses an...
Article
Full-text available
Stainless steel has excellent corrosion resistance properties, considerable long-term durability, and good mechanical strength. Hollow sections are a versatile and efficient form for construction applications. The use of cold-formed stainless steel rectangular hollow section (RHS) and square hollow section (SHS) in construction industry grasps the...
Conference Paper
This paper presents the ongoing research related to the development of IoT platforms for the detection of damage in steel railway bridges. The development encompasses several fields from sensors, to damage detection, to data transmission, and to the infrastructure management system. The paper introduces the concept of regular availability of up-to-...
Conference Paper
It has been investigated that the patch loading resistance model available in European design rules may lead to an underestimation for plate girders with closely spaced transverse stiffeners. Predicting models have been proposed for this case, as well as the case of girders with longitudinal stiffeners. However, when the problem is dealt with coupl...
Article
Strength, ductility and strain-hardening on austenitic stainless steel are interesting structural properties that suggest a potential strategic structural application as dissipative members in seismic-resistant systems. Eccentrically braced frames (EBF)are structural systems that dissipate energy during seismic episode by means of shear- or bending...
Conference Paper
High ductility, durability, strain hardening and good fire resistance make stainless steel an excellent construction material. In recent years, a considerable amount of research has been devoted to the understanding of the structural performance of single isolated stainless steel members. Notwithstanding, advances related to the analysis of more co...
Article
This article presents some observations related to the phenomenon that occurs when transversally and longitudinally stiffened steel plate girders are subjected to patch loading. The failure mechanism differs considerably for the particular structural case of girders with largely spaced transverse stiffeners, which have been studied thoroughly in la...
Article
Full-text available
Currently, one of the most used steel bridge assembly methods is the Incremental Launching Method (ILM). Its practical application consists in passing the bridge assembly through a launching shoe as well as over each support pile. For steel plate girders, a concentrate vertical reaction also known as patch loading is generated over one the flanges...
Article
Full-text available
Currently, the AISC Specification provides guidance for the calculation of the ultimate strength of unstiffened plate girder webs subjected to concentric edge loads. Specifications consider three categories: local web yielding, web crippling, and sideway web buckling. Based on previous studies, the presence of longitudinal stiffeners in the web has...
Article
This paper presents academic efforts aimed at integrating methodologies associated with the use of mobile devices, the potential of the Internet of Things (IoT), and the role of experimental education in civil engineering. This integration is developed by encompassing the use of sensors, microcontrollers, civil engineering problems, app development...
Conference Paper
Additive and subtractive technologies are disrupting numerous fields in society at various levels. Until recent years, 3D printing has been limited to considerably industrialized sectors that have been historically provided with advanced technologies associated with computer numerical control (CNC). Educational environments have been seldom enriche...
Conference Paper
Education takes many forms when it comes to teaching structural engineering in civil engineering schools worldwide. The educational spectrum, similarly to other engineering fields is wide. Methods range from classical master lectures to software- and project-based environments. Educationally, little attention has been paid though, to the potential...
Article
In this paper, the flexural response of extruded wrought aluminium girders is presented. This structural element is intended for usage in marine structures such as light docks, marinas and yacht ports. Ease of use, durability, reduced weight, manoeuvrability and the potential development of bespoke sections are appealing properties in such structur...
Article
This article presents a mechanical formulation to estimate the strength of transversally stiffened steel plate girders subjected to patch loading, in this particular case, with closely space stiffeners. Steel plate girders with closely spaced stiffeners are occasionally found in bridge design and for such cases, the current EN1993-1-5 rules underes...
Article
The use of stainless steel structures has increased during the last decade due to their durability, aesthetics and mechanical properties such as ductility, considerable strain hardening and excellent fire resistance. However, the majority of conducted research works have only focused on single isolated stainless steel members and advances in the an...
Article
Full-text available
In the construction of traditional composite bridges whose structure consists of plate girders, the concrete slabs of the decks are often casted before launching. These thin-walled webs are occasionally reinforced with longitudinal stiffeners to increase bending and shear strengths, and for bridges erected by incremental launching, these stiffeners...
Article
Full-text available
Incremental launching is one of the common steel bridge assembly methods used nowadays, its practical application consists in passing the bridge assembly through the launching shoes as well as over each support pile. In some cases, when plate girders are used, it is usual to find longitudinal stiffeners reinforcement in order to prevent web local b...
Article
Link elements are dissipative devices in form of beam segments that are typically included in eccentrically braced frames (EBF) subjected to lateral loads and seismic hazard. Studies related to short links, energy dissipation and plastic hinge formation have been presented for carbon steel elements with several conclusions at material, member and s...
Article
This paper proposes an improved theoretical prediction equation for Concrete-filled steel tubes (CFT) subjected to compressive forces. This ultimate load capacity is inferred from a database of 344 experimental results reported in the literature by using Gene expression programming (GEP). Moreover, a series of structural comparisons between design...
Conference Paper
Full-text available
Currently, the AISC code provides guidance for the calculation of the ultimate strength of unstiffened plate girder webs subjected to concentric edge loads. Specifications consider three categories: local web yielding, web crippling, and sideway web buckling. Based on previous studies, the presence of longitudinal stiffeners in the web has not been...
Article
Full-text available
This paper shows new possibilities of using novel, open-source, low-cost platforms for the structural health monitoring of heritage structures. The objective of the study is to present an assessment of increasingly available open-source digital modeling and fabrication technologies in order to identify the suitable counterparts of the typical compo...
Article
In engineering, traditional approaches aimed at teaching concepts of dynamics to engineering students include the study of a dense yet sequential theoretical development of proofs and exercises. Structural dynamics are seldom taught experimentally in laboratories since these facilities should be provided with expensive equipment such as wave genera...
Research
Full-text available
EDITORIAL INFRAESTRUCTURAS, INVESTIGACIÓN Y ACADEMIA EN TIEMPOS REVUELTOS INFRASTRUCTURE, RESEARCH AND ACADEMIA IN TROUBLE TIMES Uno de los grandes desafíos del sector de la ingeniería civil, y en particular, de la construcción a nivel mundial en las próximas décadas, será la de integrar procesos digitales de automatización y control tanto en el u...
Conference Paper
Full-text available
En la construcción tradicional de puentes mixtos acero-concreto cuya estructura consiste en vigas tipo placa, las losas de hormigón de las cubiertas son a menudo vaciadas antes del ensamblaje. Siendo estas estructuras de espesor delgado reforzadas con rigidizadores longitudinales para incrementar la resistencia a corte y pandeo, y soportar las fuer...
Conference Paper
Full-text available
Durante la erección de puentes de acero usando el método de empujes sucesivos, el ensamble de la cubierta se mueve a través de las zapatas de desplazamiento y también sobre cada pila de soporte. Como resultado de esto se genera una reacción vertical que actúa sobre la aleta de la viga, transmitiendo esta fuerza al alma de la viga lo que puede induc...
Article
This article presents an experimental and a numerical study of an incremental launching process of a steel bridge. The former is deployed in a scale-reduced laboratory,whereas the latter is performed using the finite elementmethod. The numerical simulation is based upon realistic transient boundary conditions and accurately reproduces the elastic r...
Article
Full-text available
In this paper, a realistic nonlinear 3D simulation of an incrementally launched steel bridge girder is presented. The numerical simulation accounts for three sources of nonlinearity: geometry, material and boundary conditions. For the sake of depicting the capabilities of the presented numerical model in structural verifications, the study is focus...
Research
Full-text available
Aiming to ensure a precise but affordable solution, a Do-It-Yourself digitally controlled monitoring system was built and implemented. It consisted on a crack monitoring system, thought from the combination of three power sources (solar power, battery and direct current), three data transferring systems (Bluetooth, xBee, SD card) and three sensors...
Article
Full-text available
En este estudio se presenta un análisis de la resistencia a abolladura por cortante de vigas armadas híbridas según la norma venezolana COVENIN 1618:1998. El estudio se basa en una recopilación bibliográfica de ensayos experimentales encontra-dos así como en una base de datos numérica creada por los autores. Se comparan los valores obtenidos tanto...
Chapter
Dieses Kapitel beschreibt die Stabilitatsnachweise nach EN 1993-1-5. Die EN 1993-1-5 stellt unterschiedliche Methoden zur Berücksichtigung des Plattenbeulens zur Verfügung. Die bis hier angeführten Berechnungsmethoden werden theoretisch aufbereitet und die jeweilige Nachweisführung bzw. der jeweilige Rechengang wird anschließend anhand von Beispiel...
Article
Full-text available
The vulnerability of framed structures has been analyzed until recently from two different perspectives: Structural and socio-economical. For the sake of assessing the former, indexes and objective measurements have been proposed in the literature. These indexes include relatively accurate assessments of the strength, ductility, energy absorption,...
Article
Full-text available
A girder is deemed as being hybrid when it is fabricated with different steel strengths for the flange and web panels. This type of girder is popular as the girder yields a greater flexural capacity at a lower cost and weight compared to a homoge-neous girder. Extensive experimental, theoretical and numerical research on hybrid design can be found...
Article
Full-text available
In this paper, the behavior of the intertwined shear and patch loading mechanisms in transversally stiffened steel plate girders is described. The phenomenological insight depicted in this paper shows the influence of the web thickness and the flange yield strength as well as the influence of the transverse stiffeners on the stress distribution, th...
Article
Diamond bird beak RHS X-joints are deemed as being a type of welded X-joint between steel rectangular hollow sections in which both the chord and brace are rotated 45 around their longitudinal axes. This type of joints provides aesthetic appeal that encourages its usage in the increasing demand of trussed, tubular constructions worldwide. This pape...
Article
In this paper, a mechanical model aimed at predicting the ultimate load capacity of transversally stiffened steel plate girders subjected to patch loading is revisited. This mechanical model gives accurate results for homogeneous steel plate girders (identical yield strength for web and flanges) but it is found that for the case of hybrid girders (...
Article
This article presents an experimental and a numerical study of an incremental launching process of a steel bridge. The former is deployed in a scale-reduced laboratory, whereas the latter is performed using the finite element method. The numerical simulation is based upon realistic transient boundary conditions and accurately reproduces the elastic...
Article
In this paper, an analysis of the structural response of concrete-filled tubular columns (CFT) when subjected to combined bending and compression is presented. The reference frame of the study is the usage of such members as piers of integral bridges. The main objective of the study is to assess both the resistance and the ductility of these struct...
Article
In this paper, a mechanism solution aimed at reproducing the ultimate load capacity of steel plate girders subjected to patch loading is provided. This mechanism is particularly useful for the cases in which the steel plate girders present closely spaced transverse stiffeners. A thorough description of the influence of the transverse stiffening on...
Article
Local buckling phenomena in Concrete-Filled Tubes (CFT) is prevented in EN1994 by limiting the slenderness of the steel tubes (D/t) to 90 & pi;2.This limitation is inherited from EN1993-1-1 inwhich slenderness limits are defined for Circular HollowSections (CHS). This approach has been tackled by researchers for the case of CHS but has not been stu...
Article
Full-text available
In this paper, an in-depth analysis of the structural response of concrete-filled tubular structures (CFT) is presented. The main objective of the study is to assess the resistance of these structural elements when subjected to lateral displacements. These displacements, together with the corresponding axial forces, represent the actions to which t...
Article
This paper presents an assessment of the influence of structural imperfections, namely, the residual stresses, on the ultimate load capacity of steel plate girders when subjected to patch loading. The basis of the research is a thorough comparison between numerical and experimental results as well as the recommendations for FE-modeling suggested by...
Article
Hybrid girders have proven to be an economical alternative to homogeneous girders since they provide a greater flexural capacity. One of the potential applications of hybrid steel plate girders is their usage in bridge construction. One of the potential constructive methods of these bridges is the push launch method, in which patch loads may condit...
Article
This paper presents a new resistance model for steel plate girders subjected to patch loading. The model aims to correct the EN 1993-1-5 formulation concerning the resistance to transverse forces with the help of findings presented in several doctoral studies on this topic. In addition, a statistical calibration of the new model is addressed. This...
Article
Abstract El objetivo principal de la investigación es el de reproducir numéricamente, utilizando el código Abaqus, dos series de ensayos en pilares tubulares circulares rellenos de hormigón encontrados en la literatura. La primera se refiere al conocido ensayo push-out y permite calibrar las condiciones de adherencia entre ambos materiales. La segu...
Article
Hybrid girders subjected to patch loading have been analyzed in a detailed fashion for the case in which the plates that assemble the girders are transversally stiffened. Scant work, however, is available for the case in which the girders are hybrid and, simultaneously, longitudinally stiffened. The driving force for developing the present research...
Article
Extensive research focused on the structural behavior of hybrid steel plate girders is nowadays available in the literature. Furthermore, extensive research devoted to the resistance of homogeneous girders to patch loading has been performed in the last decades. Investigations dealing simultaneously with both fields are, however, rather scarce. The...
Article
The resistance of plate girders subjected to patch loading has been studied thoroughly for the case of homogenous girders. The particular case of hybrid girders has been generally treated identically than for homogenous specimens. In this paper, the current EN1993-1-5 formulation is evaluated and some peculiarities concerning the treatment of hybri...
Article
Concentrated loads on steel plate girders should be carried by vertical transverse stiffeners deployed on each loaded cross-section of the members. There are, however, certain design cases in which vertical stiffeners cannot be physically deployed in such sections. The launching of steel bridges during construction is one remarkable realistic case...
Article
During the last few decades, owing to their several advantages, composite columns have gained acceptance for high-rise buildings as an alternative to steel or reinforced concrete columns. When a composite column is subjected to an eccentrically applied sustained axial load, its structural response must undergo both a short-term and long-term analys...
Article
In this paper, an experimental campaign on hybrid steel plate girders subjected to patch loading is presented. The experimental study is focused on the behavior of the transversally stiffened panels under concentrated load as well as the influence of adjacent panels on the ultimate resistance of the steel girders. Initial imperfections of the web a...
Article
Full-text available
RESUMEN Las cargas concentradas en vigas armadas deben ser soportadas por rigidizadores verticales dispuestos en las secciones transversales solicitadas. Sin embargo, existen casos prácticos en los cuales resulta físicamente imposible la rigidización de todas las secciones de la viga que se verán sometidas a dichas solicitaciones. Un ejemplo paradi...

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Projects (6)
Archived project
Aim: To develop Construction 4.0 activities for AEC classrooms using lots of Maths and lots of STEAM
Project
Ashvin aims at enabling the European construction industry to significantly improve its productivity, safety conditions and economy by providing a proposal for a European wide digital twin standard, an open source digital twin platform integrating IoT and image technologies. This H2020 project includes a set of demonstrators (bridges, infrastructure and buildings) across Europe.