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  • Jaime Mata-Falcón
Jaime Mata-Falcón

Jaime Mata-Falcón
ETH Zurich | ETH Zürich · Department of Civil, Environmental and Geomatic Engineering

PhD

About

74
Publications
25,899
Reads
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897
Citations
Citations since 2016
67 Research Items
893 Citations
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
Additional affiliations
September 2015 - present
ETH Zurich
Position
  • Senior Researcher
November 2014 - January 2015
École Polytechnique Fédérale de Lausanne
Position
  • Research Assistant
August 2010 - October 2014
Universitat Politècnica de València
Position
  • Research Assistant

Publications

Publications (74)
Article
Full-text available
The construction industry produces buildings and infrastructure. These construction works are typically immobile and customised, and must meet many criteria to provide value to modern society: structural safety, durability, serviceability, aesthetics and integration, environmental sustainability and construction efficiency. Accordingly, traditional...
Article
Full-text available
This paper describes the design, fabrication, and testing process of an optimised, reinforced concrete ribbed floor slab fabricated using robotically 3D printed formwork. The design of the floor slab is based on the alignment of ribs along the trajectories of the principal bending moments. A workflow is described that generates a rib layout based o...
Article
Full-text available
The concrete used in floor slabs accounts for large greenhouse gas emissions in building construction. Solid slabs, often used today, consume much more concrete than ribbed slabs built by pioneer structural engineers like Hennebique, Arcangeli and Nervi. The first part of this paper analyses the evolution of slab systems over the last century and t...
Article
Full-text available
This study investigates the fabrication and the structural performance of concrete beams using weft-knitted tubular fabrics as stay-in-place formworks with integrated textile reinforcement. The use of non-corrosive high-strength textile materials for flexible formworks offers great potential for efficient construction processes and a bespoke design...
Article
Full-text available
The post-cracking behaviour of steel fibre reinforced concrete (SFRC) is typically determined following an inverse analysis of flexural prism tests. Although these tests have significant practical merit, it has been argued that the anisotropy of the material due to the dispersion and orientation of the fibres cannot be accounted for in these tests....
Article
Full-text available
Weft-knitted textiles made from high-strength fibrous materials offer great potential for use as a flexible stay-in-place formwork and reinforcement system since they allow creating complex geometries (i.e. doubly curved or folded) and introducing spatial features such as ribs within the fabric. However, the closed surface of the textile and its pl...
Article
Full-text available
This study investigates the influence of different printing set-ups and materials on the bond strength of reinforcement manually placed between 3D printed concrete layers. An identical experimental campaign was performed at two institutes in Switzerland and Italy. Each institute used its own printing process, which consisted either of a set on-dema...
Conference Paper
Full-text available
Most current technologies in digital fabrication with concrete (DFC) rely on controlled environmental conditions and, thus, have been used in prefabricated construction. Prefabricated reinforced concrete elements produced in factories need assembly and connection on-site. Using DFC for producing tailor-made geometries and applying surface roughness...
Conference Paper
Full-text available
The Compatible Stress Field Method (CSFM) is a computer-aided FE-based stress field design, in which classical stress fields are complemented with kinematic considerations and more refined material constitutive relationships. Among other benefits, this allows accounting for tension stiffening to capture closely the load-deformation behaviour of the...
Article
Full-text available
The use of high-strength fibrous materials offers great potential to serve as the main reinforcement in the flexural response of lightweight concrete structures. Specifically, weft-knitted textile reinforcement allows creating complex geometries (i.e. doubly curved or folded) and introducing straight inlays as well as spatial features such as ribs...
Chapter
Full-text available
The Mesh Mould technology combines formwork and structural reinforcement into a robotically fabricated construction system. This method allows for the industrial and full-scale realisation of complex curved, steel-reinforced concrete structures without the need for conventional formwork. The paper presents a new material and cost efficient industri...
Chapter
Full-text available
The critical parts of structures are typically discontinuity regions, where abrupt changes in geometry occur or large concentrated loads are applied. In engineering practice the verification of the ultimate limit stage of such discontinuity regions employs strut-and-tie models or stress fields based on the lower bound theorem of plasticity theory....
Article
Full-text available
Concrete tensile stresses influence the cracking behaviour and the stiffness of reinforced concrete (RC) members. Most design codes account for this tension stiffening effect using an effective reinforcement ratio. Although this ratio has a significant influence on the design of RC structures, its quantification is controversial in many cases, and...
Article
Full-text available
Distributed fibre optical sensing (DFOS) is increasingly used in civil engineering research. For reinforced concrete structures, almost continuous information concerning the deformations of embedded reinforcing bars can be obtained. This information enables the validation of basic and conventional assumptions in the design and modelling of reinforc...
Article
Full-text available
The Eggshell fabrication process combines the 3D printing of formwork with the simultaneous casting of a fast-hardening concrete. One limiting factor to reaching mass-market adoption is a suitable reinforcing strategy. In this study, a reinforcement strategy combining steel reinforcing bars with steel fibres is explored. A series of eight beams wer...
Article
Full-text available
The accurate extraction of the crack patterns and measurements of crack kinematics are essential for understanding the mechanical behaviour in experiments on structural concrete as well as in the validation and further development of sound mechanical models. This paper presents important refinements of the authors' recently published automatic crac...
Chapter
The form freedom enabled by digital fabrication with concrete technologies provides advantages for a wide range of concrete based objects, from architectural to structural elements. The current chapter focuses on the specifics of structural design and engineering of DFC with emphasis on those technologies based on Additive Manufacturing with extrus...
Chapter
Full-text available
Providing reinforcement is essential for the structural integrity of concrete elements and for safely handling, transporting, and assembling prefabricated concrete parts. However, the integration of reinforcement is a persisting challenge in 3D concrete printing with extruded concrete. This paper presents a production process consisting of 3D print...
Article
Full-text available
Distributed fibre optical sensing (DFOS) allows for quasi-continuous strain measurement in a broad range of gauge lengths and measurement frequencies. In particular, Rayleigh backscatter-based coherent optical frequency domain reflectometry has recently registered a significant application increase in structural concrete research and monitoring tha...
Article
Full-text available
Weft-knitted textiles offer many advantages over conventional woven fabrics since they allow the fabrication of doubly curved geometries without the need of stitching multiple patches together. This study investigated the use of high-strength continuous fibres as knitted textile reinforcement, focusing on various knitting patterns, fibre materials,...
Conference Paper
Full-text available
Link to the video: https://youtu.be/Kwtpozc82WUfib
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Book
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Chapter
Following the long-standing tradition of fib in promoting the use of consistent design methods, strut-and-tie models were formally incorporated in Model Code 1990 to serve as the design basis for discontinuity regions. This choice was largely acknowledged as a sound approach for design and was thereafter followed in many national standards. For Mod...
Article
Full-text available
3D concrete printing (3DCP) offers many new possibilities. This technology could increase the productivity of the construction industry and reduce its environmental impact by producing optimised structures more efficiently. Despite significant developments in materials science, little effort has been put in developing reinforcement strategies compa...
Conference Paper
Full-text available
The construction industry produces buildings and infrastructure and, hence, satisfies basic needs of modern society. It provides a considerable portion of total value added and worldwide jobs. At the same time, it is responsible for more than 11% of CO2 energy-related carbon dioxide (CO2) emissions worldwide. Digital concrete fabrication is a young...
Conference Paper
Full-text available
This paper presents a novel concept of fibre reinforcement placement for digital fabrication with concrete, particularly suitable for 3D concrete printing, which aims at overcoming the limitations of adding the fibres to the concrete mix. In this process, the fibres are placed in-between layers, which allows aligning the fibres and grading their co...
Article
Full-text available
The combined application of distributed fibre optical strain measurements on reinforcing bars and digital image correlation (DIC) measurements on the concrete surface has a great potential to increase knowledge in many fields of structural concrete. This paper explores the advantages of these measurement techniques for concrete tests and the key as...
Conference Paper
Full-text available
The acquisition and evaluation of the crack behaviour in experiments on quasi-brittle materials, such as concrete, mortar, or masonry is essential for understanding their structural behaviour. This article presents a fully automated procedure to detect cracks and measure crack kinematics in experiments instrumented with digital image correlation (D...
Conference Paper
Full-text available
This study investigates the structural behaviour of different reinforcement concepts for extrusion-based 3D concrete printed beams. As longitudinal reinforcement, unbonded post-tensioning and passive bonded reinforcement are explored. As shear reinforcement, fibres and cables placed between the layers of concrete are analysed. The results of four-p...
Article
Over the past decade innovative techniques for shaping concrete have emerged, all aiming to use less material and reduce the need for traditional formwork. One very promising method is to shape concrete dynamically: referred to as Smart Dynamic Casting (SDC), this process was pioneered in 2012 as the first robotically-driven system for slipforming...
Conference Paper
Full-text available
The use of non-corrosive high-strength fibrous materials as textile reinforcement allows the construction of more slender elements when compared to members with conventional steel reinforcing bars. This paper explores the load-deformation behaviour of weft-knitted textile reinforcement embedded in a fine grain concrete. In this experimental study,...
Book
This book presents the principles and a validation of the Compatible Stress Field Method (also referred to in the book as the CSFM), a new method for the design and assessment of concrete structures particularly suitable for so-called discontinuity regions, for which it overcomes the aforementioned limitations of classical design tools and existing...
Chapter
Full-text available
Digital Fabrication with Concrete (DFC) brings many new possibilities for the design and production of concrete structures, promising to revolutionise the concrete construction industry. While technological and material challenges have already been overcome to a large extent, there is still a lack of sufficiently mature reinforcement solutions. The...
Chapter
Full-text available
Conventional construction of doubly-curved concrete structures is a time-, labour- and cost-intensive process. Flexible formworks have already been identified as a possible solution to produce such structures more efficiently. The KnitCrete technology developed at ETH Zurich uses 3D weft-knitted fabrics as stay-in-place formwork, which deliver mult...
Chapter
Full-text available
This paper describes the design and fabrication process of a concrete column cast in ultra-thin, 3D printed formwork, using a process known as Eggshell. The column was prefabricated as part of a real-world construction project, serving as the main load-bearing element for a reciprocal timber frame structure. The fabrication of the column required u...
Article
DOWNLOAD LINK: https://authors.elsevier.com/a/1apE13IhXMjNct _____________________________________________________________________________ Concrete is a highly versatile construction material, not only for the reason that it has excellent properties in terms of structural performance, building physics, availability and price, but also because it ca...
Article
Digital fabrication technologies utilizing concrete (DFC) have recently enabled form freedom for the production of a variety of concrete-made objects having mainly architectural and aesthetic functions. Structural elements or civil/building structures made by DFC demonstrate a high engineering potential, mainly for tailoring the final shape while o...
Article
Full-text available
The acquisition and evaluation of the crack behaviour in experiments on quasi-brittle materials, such as concrete, mortar, or masonry is essential for understanding their structural behaviour. This publication presents a fully automated procedure to detect cracks and measure crack kinematics in laboratory experiments instrumented with digital image...
Article
Full-text available
Concrete is a material favored by architects and builders alike due to its high structural strength and its ability to take almost any form. However, to shape concrete structures, heavy-duty formwork is usually necessary to support the fresh concrete while curing. To expand geometrical freedom, three-dimensional (3D) printed concrete formwork has e...
Article
Full-text available
The Cracked Membrane Model with fixed, interlocked cracks (CMM-F), whose basic concepts were already outlined in this journal more than 20 years ago, is the most general approach for cracked reinforced concrete members subjected to in-plane stresses as long as one set of uniformly-spaced cracks is considered and steel and bond stresses are modelled...
Article
Full-text available
Compression field approaches are well-established methods used to analyze the load-deformation behavior of reinforced concrete elements subjected to in-plane shear and normal forces. In this paper, the simplified Cracked Membrane Model, considering rotating, stress-free cracks, is extended to include the effect of fiber reinforcement. The key advan...
Conference Paper
Full-text available
Test methods used to characterize steel fibre reinforced concrete (SFRC) at the material constitutive level continue to be a topic of discussion in the scientific community. The principal aim of these tests, as is required for input into physical models to describe structural behaviour, is to gather the residual or post-cracking response of the SFR...
Article
Dapped-end beams are frequent precast concrete elements. Spalling on the top of the hanger reinforcement has been observed to be often their governing failure mode. This failure hinders the geometric definition of strut-and-tie models for design or assessment purposes. In this work, a simplified procedure for defining the geometry of strut-and-tie...
Chapter
Full-text available
Digital technologies overcome typical constraints of traditional concrete construction processes caused by the high impact of labour costs and bring about many new possibilities to the conceptual design, dimensioning, detailing, and production of concrete structures. While the potential of geometric flexibility is being extensively explored, most d...
Chapter
Digital fabrication with concrete has for more than a decade been of high interest in both research institutions and industries. A particular interest has been set on Contour Crafting, a type of layered extrusion with concrete, which in recent years has been used for the fabrication of single and multi-story buildings. However, these have been done...
Chapter
Mesh Mould is a digital fabrication technique developed at ETH Zurich in which the reinforcement and formwork production are unified in a robotically controlled system. An industrial robot fabricates a dense, three-dimensional, double-sided, welded reinforcement mesh that is infilled with a special concrete mix that achieves sufficient compaction w...
Conference Paper
Full-text available
Many structural concrete members are subjected to predominant in-plane loading (plane stress). The knowledge about the serviceability behaviour of such structural elements is still scarce, particularly regarding crack width calculation. This paper presents and compares three different approaches for calculating crack widths in such members. In the...
Conference Paper
Full-text available
In-plane loading ("plane stress") is a frequent loading situation in concrete structures. While many studies investigated the ULS behaviour of such elements over the past decades, serviceability aspects have received much less attention. Only few existing models yield information on crack spacings and crack widths, which in addition have hardly eve...
Article
The fabrication of novel reinforced concrete structures using digital technologies necessarily requires the definition of suitable strategies for reinforcement implementation. The successful integration of existing reinforcement systems, such as steel rebar, rods, wires, fibres or filaments, will indeed allow for printed concrete structures to be d...
Chapter
In spite of a huge amount of theoretical and experimental studies, the mechanisms underlying the shear behaviour of structural concrete girders with little or no transverse reinforcement are still not fully understood. While various shear models are available today, these models are mainly based on similar assumptions, developed and validated using...
Chapter
Full-text available
Strut-and-tie models and stress fields are widespread methods in engineering practice for the design of dis-continuity regions. They are powerful tools that give the engineer control over the design, but they are not di-rectly applicable for checking serviceability criteria and their use for the dimensioning of real-life structures of-ten requires...
Conference Paper
Full-text available
Limit analysis methods, whose origins date back to the early days of reinforced concrete, are powerful tools for the design, dimensioning and detailing of concrete structures. They are transparent, allow to trace the flow of forces and give the engineer control over the design. However, they are typically used as hand calculations, making their app...
Conference Paper
Full-text available
This paper explores the combined application of digital image correlation (DIC) and high-resolution fibre optical (FO) measurements to structural concrete elements. These novel distributed optical instrumentation techniques allow measuring virtually continuously and without affecting the mechanical behaviour (i) displacements on the concrete surfac...
Conference Paper
Full-text available
A series of 8 reinforced concrete (RC) tension members retrofitted with CFRP laminates were recently tested at ETH Zurich in order to study the bond behaviour of carbon fibre reinforced polymer (CFRP) laminates glued on concrete. Different specimen configurations, varying the reinforcement ratio of conventional reinforcement and CFRP laminate, were...
Conference Paper
Full-text available
Digital fabrication with concrete has become a highly interesting topic due to the potential for freeform architecture and efficient material placement, with major strides in its development taking place in the past few years. However, reinforcement remains problematic, as current technologies rely mostly on post-hoc placement and infill. In this p...
Conference Paper
Full-text available
Aurelio MUTTONI-DOCTOR INGENIERO DE CAMINOS, CANALES Y PUERTOS ÉCOLE POLYTECHNIQUE FÉDÉRAL DE LAUSANNE, ENAC CATEDRÁTICO DE UNIVERSIDAD aurelio.muttoni@epfl.ch PALABRAS CLAVE: Apoyos a media madera, diseño estructural, método de los elementos finitos, campos de tensiones, modelos de bielas y tirantes RESUMEN La generación automática de campos de te...