fib Commission 5 (COM5) gathers a balanced mix of experts coming from various fields (academics, owners, suppliers, government agencies and testing laboratories) who are volunteering their work into several task groups aiming to provide knowledge and information to students and the professional workforce for the best use of concrete.
Scope and objective of technical work
The scope of COM5 is to promote the technology for reinforcing and prestressing materials and systems and to improve their quality. This includes aspects from design, production, testing, up to the installation and final use of these materials and systems. The scope also includes maintaining and improving dialogue between producers, specifiers, and users of these materials and systems.
Finally, COM5 encourages new research and developments within its scope.
|First name||Last name||Country||Affiliation|
|Hans Rudolf||Ganz||Switzerland||Ganz Consulting|
|Akio||Kasuga||Japan||Sumitomo Mitsui Construction Co., Ltd|
|Ulf||Nürnberger||Germany||University of Stuttgart|
|Kiyotaka||Hosoi||Japan||Shinko Wire Company Ltd|
|Pedro||Almeida||Brazil||Sao Paulo University|
|Larry||Krauser||United States||General Technologies, Inc.|
|Tommaso||Ciccone||Italy||TENSA (Tensacciai s.r.l.)|
|Antonio||Caballero||Switzerland||Screening Eagle Technologies AG|
|Randall||Poston||United States||Pivot Engineers|
|Teddy||Theryo||United States||Florida Department of Transportation|
|Theodore||Neff||United States||General Technologies, Inc.|
|Jaime||Gálvez Ruiz||Spain||Universidad Politecnica de Madrid|
|Hiroshi||Mutsuyoshi||Japan||Saitama University , Fac. of Eng.|
|Hermann||Weiher||Germany||matrics engineering GmbH|
|Shinya||Ikehata||Japan||Central Nippon Expressway Co Ltd|
|Sven||Junge||Germany||ISB Institut für Stahlbetonbewehrung e.V.|
|Behzad||Manshadi||Switzerland||BBR VT International Ltd|
|Ladin||Camci||United Kingdom||CARES (Certification Authority for Reinforcing Steels)|
|Hirokazu||Katsuda||Japan||Sumitomo Electric Industries, Ltd.|
|Thore||Hagberg||Norway||Dr.Ing. Thore Hagberg A.S.|
|Guillermo||Ramirez||Switzerland||VSL International Ltd|
- TG5.1 - FRP Reinforcement for concrete structures
- TG5.2 - Reinforcing steels and systems
- TG5.3 - Prestressing materials and systems
- TG5.4 - Recommendations for ground anchor systems
- TG5.5 - Cables for cable-supported bridges
- TG5.10 - Inspection and monitoring of reinforced/prestressed concrete structures
- TG5.11 - Polymer-duct systems for internal bonded post-tensioning
- TG5.12 - Ultra-high strength prestressing steels for post-tensioning kits and stay systems
- TG5.13 - Grouting of tendons in prestressed concrete
TG5.1 - FRP Reinforcement for concrete structures
The main objectives of TG5.1 are:
- The elaboration of design guidelines in accordance with the design format of the fib Model Code for Concrete Structures 2010 (“fib MC2010”) and Eurocode 2.
- Link with other initiatives regarding material testing and characterisation & development of standard test methods.
- Participation in the international forum in the field of advanced composite reinforcement, stimulating the use of FRP for concrete structures.
- Guidance on practical execution of concrete structures reinforced/prestressed/strengthened by FRP.
WP5.1.1 - Prestressing with FRPFRP reinforcements have the benefit of being non-susceptible to corrosion and having high strength. To utilize the high strength of FRP, it is of particular interest to also use them in prestressing applications. This results in prestressed concrete structures, making use of FRP prestressing reinforcement, with a unique combination of high-end mechanical and durability performance.The proposed bulletin would be a state-of-the-art report which special focus on the two different topics:
- Prestressed FRP for new structures
- Prestressing of FRP for strengthening purpose of RC and PC
First name Last name Country Affiliation Renata Kotynia Poland Lodz University of Technology Christoph Czaderski-Forchmann Switzerland EMPA, Structural Engineering David Fernández-Ordóñez Switzerland fib Leonardo Todisco Spain E.T.S.I. Caminos, Canales y Puertos Ted Donchev United Kingdom Kingston University Stijn Matthys Belgium Ghent University Nicola Nistico Italy Sapienza Università di Roma Eva Oller Ibars Spain Technical University of Catalonia Mohammadali Rezazadeh Portugal University of Minho José Manuel de Sena Cruz Portugal University of Minho Eythor Thorhallsson Iceland Reykjavik University Raphael JANIV France - First name Last name Country Affiliation György L. Balázs Hungary Budapest Univ. of Techn. & Economics Francesca Ceroni Italy Universitá degli Studi di Napoli Parthenope Stavroula (S.J.) Pantazopoulou Canada The Lassonde Faculty of Engineering, York University Emidio Nigro Italy Università degli Studi di Napoli Federico II Andreea Serbescu United Kingdom University of Sheffield+ Amey consulting Dionysios Bournas United Kingdom Nottingham University Cristina Barris Spain University of Girona Valter Carvelli Italy Politecnico di Milano Tommaso D’Antino Greece University of Patras Emmanuel Ferrier France Université Lyon 1 Reyes Garcia Lopez United Kingdom School of Engineering, University of Warwick Tomislav Kisicek Croatia University of Zagreb Nicola Nistico Italy Sapienza Università di Roma Alessandro Proia Belgium Ghent University José Manuel de Sena Cruz Portugal University of Minho Ted Donchev United Kingdom Kingston University Christoforos Kolyvas Greece FYFE EUROPE S.A. Douglas Gremel United States Owens Corning Antonio Nanni Italy Univ. degli Studi di Napoli Federico II Maria Rosaria Pecce Italy Università del Sannio Andrea Prota Italy Universita di Napoli Federico II Thierry Berset Switzerland SIKA Services AG Konrad Zilch Germany TU München Antonio Bilotta Italy University of Naples Federico II Carlos Ospina United States Simpson, Gumpertz & Heger Inc. Eythor Thorhallsson Iceland Reykjavik University André Weber Germany Schöck Bauteile GmbH Szymon Cholostiakow United Kingdom University of Sheffield Thanasis Triantafillou Greece University of Patras Eva Oller Ibars Spain Technical University of Catalonia David Fernández-Ordóñez Switzerland fib Lluis Torres Spain University of Girona B. Kriekemans Belgium Fortius Sándor Sólyom Hungary Budapest Univ. of Techn. & Economics Vanessa Buchin Roulie Switzerland VSL INTERNATIONAL Viktor Gribniak Lithuania Vilnius Gediminas Technical University Tamon Ueda China Shenzhen University Stijn Matthys Belgium Ghent University Renata Kotynia Poland Lodz University of Technology Vesna Raicic United Kingdom University of Bath Ana Veljkovic Italy Politecnico di Milano Maurizio Guadagnini United Kingdom University of Sheffield Theodoros Rousakis Greece Democritus University of Thrace Lampros Koutas Greece University of Thessaly Joaquim A. O. Barros Portugal Universidade do Minho Georgia Thermou United Kingdom University of Nottingham Mark Verbaten Netherlands ABT bv Yu Zheng China - Marta Del Zoppo Italy University of Naples Federico II Erkan Akpinar Turkey Kocaeli University Marta Baena Spain University of Girona Bryan Barragan France OCV Chambery International Jian-Fei Chen Taiwan, Province of China Southern University of Science and Technology Mihaela Anca Ciupala United Kingdom University of East London Halldor Gunnar Dadason Iceland Reykjavik University, Orbicon Artic Marco Di Ludovico Italy University of Naples David Escolano Margarit United Kingdom The University of Sheffield Sorin-Codrut Florut Romania Politehnica University of Timisoara Ivana Krajnović Belgium Ghent University Marianoela Leone Italy Universita del Salento Ali M. Mohaghegh Germany E. ON Climate & Renewables GmbH Azer Maazoun Belgium Ghent University Niek Pouwels Netherlands ABT Francesca Roscini Italy University of Sheffield Roman Sedlmair Germany Karlsruher Institut für Technology (KIT) Souzana Tastani Greece Democritus University of Thrace Niki Trochoutsou United Kingdom University of Sheffield Muhammad Arslan Yaqub Belgium Ghent University Katarzyna Zdanowicz Germany Technische Universität Dresden Robert Garke Germany Halfen Nora Bies Germany TU Kaiserslautern Gian Piero Lignola Italy University of Naples Federico II Mohammadali Rezazadeh Portugal University of Minho Christoph Czaderski-Forchmann Switzerland EMPA, Structural Engineering Luís Correia Portugal University of Minho Ciro Del Vecchio Italy - Gabriele Balconi Italy Sireg Geotech s.r.l. Paolo Casadei Italy Sireg Geotech s.r.l. Marco Damiani Italy Universita La Sapienza di Roma Annalisa Franco Italy Italian National Research Council Peng Gao China Hefei University of Technology Chandan Gowda United Kingdom Atkins Global Szymon Grzesiak Germany TU Kaiserslautern Rania Khattab United Arab Emirates Abu Dhabi University Kaloyana Kostova United Kingdom National Composites Centre Khaled Mohamed Canada - Ronald Niedermeier Germany Technische Universität München Daniel Pohoryles Italy European commission Javad Shayanfar Portugal University of Minho Leonardo Todisco Spain E.T.S.I. Caminos, Canales y Puertos Simone Tomai United Kingdom Richter Associates Ltd Michel Van Beek Netherlands BeVePro Consultancy Weiqiang Wang China Hohai University Yoshiaki Yamamoto Japan - Özgür Yurdakul Czech Republic Univerzita Pardubice Đorđe Čairović Czech Republic - Craig Giaccio United Kingdom Arcadis
TG5.2 - Reinforcing steels and systems
fib Task Group 5.2 (TG5.2) will consider all aspects related to reinforcing steels and systems from design to manufacturing, testing and final installation, use and maintenance. It will initially address several topics considered high priority. TG5.2 will create sub-groups to work on particular subjects.
Areas of interest:
- review of the reinforcing steel grades available on the market (strength, ductility, bond, fatigue, durability properties) and relevant concrete structure design codes;
- manual for reinforcing materials and systems;
- technical report on fabrication of reinforcement;
- state of the knowledge on the bond properties of reinforcing steels;
- state of the knowledge on the fatigue resistance properties of reinforcing steels.
First name Last name Country Affiliation Hans Rudolf Ganz Switzerland Ganz Consulting Ulf Nürnberger Germany University of Stuttgart Thore Hagberg Norway Dr.Ing. Thore Hagberg A.S. Steven McCabe United States Nat. Inst. of Standards & Technologies Manuel Elices Calafat Spain Universidad Politecnica de Madrid David Fernández-Ordóñez Switzerland fib Larry Krauser United States General Technologies, Inc. John Cairns United Kingdom Heriot-Watt University Ladin Camci United Kingdom CARES (Certification Authority for Reinforcing Steels) Rolf Eligehausen Germany IWB, Universität Stuttgart David Gustafson United States CRSI - Concrete Reinforcing Steel Sven Junge Germany ISB Institut für Stahlbetonbewehrung e.V. Dennis Keogh United Kingdom Laing O’Rourke Infrastructure Services Andrew Truby United Kingdom Truby Stevenson Ltd Vladyslav Shekhovtsov Ukraine Odesa State Academy of Civil Engineering and Architecture Emily Halliwell United Kingdom The Concrete Centre Theodore Neff United States General Technologies, Inc. Md. Rifat Bin Ahmed Majumdar Bangladesh RILEM Associates Thierry Steux Belgium -
TG5.3 - Prestressing materials and systems
Since Eugène Freyssinet’s first of use high-strength steel wire for prestressing concrete in the late 1920s, there have been many changes in prestressing systems used around the world. Current systems bear little resemblance to many of the older methods used in the past. Designers and contractors need information regarding these historical practices and materials to evaluate existing prestressed concrete in need of repair and to determine effective strategies to extend service life and enhance performance. Further, as new technologies are developed, they are often used in some countries but not in others.
Task Group 5.3 (TG5.3) has established two goals: 1) to develop a state-of-the-art report describing the evolution and development of prestressing systems and to identify recent innovations and advances, and 2) to develop a new bulletin that provides recommendations for the installation of post-tensioning systems.
First name Last name Country Affiliation David Fernández-Ordóñez Switzerland fib Theodore Neff United States General Technologies, Inc. Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Christian Gläser Germany DYWIDAG-Systems International Carol Hayek United States CCL Kiyotaka Hosoi Japan Shinko Wire Company Ltd Shinya Ikehata Japan Central Nippon Expressway Co Ltd Larry Krauser United States General Technologies, Inc. Lev Zaretsky Russian Federation Armasteel Llc Hirokazu Katsuda Japan Sumitomo Electric Industries, Ltd. Nadarajah Surendran United Kingdom PRAETER Engineering Ltd Luca Civati Italy Tensacciai s.r.l. Jean‐Baptiste Domage Switzerland VSL Thierry Steux Belgium -
TG5.4 - Recommendations for ground anchor systems
The overall motivation of Task Group 5.4 (TG5.4) is to establish a modern recommendation for the qualification of ground anchor systems.
The main objective of TG5.4 is to prepare a bulletin entitled “Recommendation for ground anchor systems” based on and updating earlier documents such as the “Recommendations for the design and construction of ground anchors”, 1996. The recommendations will include significant content for qualification of ground anchor systems covering prestressed permanent and temporary anchors.
First name Last name Country Affiliation Ulf Nürnberger Germany University of Stuttgart Javier Ripoll Garcia-Mansilla Spain Ripoll Consulting de Ing. Cyril Gaucherand France Freyssinet Gosta Ericson Sweden Sweco VBB AB Mark Sinclair Australia Structural Systems (Civil) Pty Ltd David Fernández-Ordóñez Switzerland fib Theodore Neff United States General Technologies, Inc. Chris Irvin United Kingdom DYWIDAG-SYSTEMS INTERNATIONAL Ltd. Matthias Ryser Germany Dr. Vollenweider AG Hermann Weiher Germany matrics engineering GmbH Philipp Egger Switzerland VSL International LTD Behzad Manshadi Switzerland BBR VT International Ltd Matthias Wild Germany Technical University of München Adrian Gnägi Switzerland VSL International Ltd. Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp. Xiaomeng Wang Switzerland BBR VT international Ltd. Andreas Schiller Germany Stahlwerk Annahütte
TG5.5 - Cables for cable-supported bridges
fib Bulletin 89, Acceptance of cable systems using prestressing steels, as an update of the previous fib Bulletin 30 was published in 2019.
The goal of Task Group 5.5 (TG5.5) is to work on selected individual topics related to cable systems for a further future update of Bulletin 89. The topics will be addressed one after the other and published in a few individual technical reports before they will be included in a full revision of Bulletin 89.
Workflow and Timeline:
- Fire protection and fire testing of cables: 2020 - 2023
- Damper/damping requirements: 2022 - 2024
- Icing / ice mitigation of cables: 2024 - 2025
- Update on inspection technologies of cables
- SHMS for cable stayed bridges with post-data processing
- Illumination of stay cables
- Terrorism protection of cables
A new technical report on fire protection of stay cables is expected to be published in 2023.
First name Last name Country Affiliation Akio Kasuga Japan Sumitomo Mitsui Construction Co., Ltd Kiyotaka Hosoi Japan Shinko Wire Company Ltd Christos Georgakis Denmark Aarhus University Adrian Tejera Spain Tycsa PSC Spain David Goodyear United States Consultant Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Werner Brand Germany DYWIDAG-Systems International Antonio Caballero Switzerland Screening Eagle Technologies AG Kathy Meiss Germany Stuttgart University of Applied Sciences David Fernández-Ordóñez Switzerland fib Theodore Neff United States General Technologies, Inc. Jan Winkler Denmark Atkins Hiroshi Mutsuyoshi Japan Saitama University , Fac. of Eng. Alex Gutsch Germany MPA Braunschweig Shinya Ikehata Japan Central Nippon Expressway Co Ltd Manuel Escamilla García-Galán Spain PONTEM Robert Widmann Switzerland EMPA Gregory Hasbrouk United States Parsons Philipp Egger Switzerland VSL International LTD Haifeng Fan Switzerland BBR Vt International Ltd. Ivica Zivanovic France Freyssinet Behzad Manshadi Switzerland BBR VT International Ltd Hirokazu Katsuda Japan Sumitomo Electric Industries, Ltd. Sherif Mohareb Germany KLÄHNE BUNG Ingenieure Felix Weber Switzerland Maurer Switzerland GmbH Max Vollmering Germany DYWIDAG-Systems Internationa Don Bergman Canada COWI Guy Larose Canada RWDI Andrea Castiglioni di Caronno Italy TENSA (Tensacciai s.r.l.)
TG5.10 - Inspection and monitoring of reinforced/prestressed concrete structures
Maintenance of aging infrastructure (buildings, bridges, tunnels, etc.) is a significant part of both public, and private-entities’ budgets. The worldwide infrastructure and property maintenance costs are estimated to be EUR 180 billion per year. These costs depend on industry sector, age of the assets and governmental regulations. They highly affect the financial situation of public bodies and the profitability of enterprises.
There is a need to develop a guideline document to cover state-of-the-art inspection method statements, available sensor technologies including emerging digital solutions and remote sensing (e.g. drone inspection).
The required time for the development of this guideline is estimated between two to three years. The rough and high-level schedule is suggested as follows:
- First 6 to 9 months focused on building up the team and finalize the definition of the scope and content. Both are interlinked;
- Next 12 to 18 months working on developing the content of the different chapters;
- Final 6 to 9 months to finalize the first draft, including editorial review, before its submission to the TG 5.10 and C5;
- Finally, some time is expected to engage the peer reviewers and answer questions/comments received from the TG 5.10 and C5.
First name Last name Country Affiliation Antonio Caballero Switzerland Screening Eagle Technologies AG Jan Winkler Denmark Atkins David Fernández-Ordóñez Switzerland fib Helder Sousa Portugal Brisa Group Gabriel Sas Sweden Luleå University of Technology Isaac Farretas Denmark COWI A/S. International Bridges Sara Subtil United Kingdom Arcadi Consulting (UK) Ltd. Andrej Anzlin Slovenia Slovenian National Building and Civil Engineering Chris Mundell United Kingdom ATKINS Limited Hamed Layssi Canada FprimeC Solutions Inc. Cosimo Longo Italy Anas S.p.A. Ruben Romero Spain Freyssinet S.A.U. Andreas Castiglioni Italy Milano Serravalle S.p.A.
TG5.11 - Polymer-duct systems for internal bonded post-tensioning
Re-activate the earlier Task Group for polymer duct systems.
It should be the objective to limit changes to a minimum only where needed. It is also suggested to limit the number of drafting members to a relatively small group to facilitate web-meetings, and subsequently circulate draft changes to a wider group. Since fib Bulletin 75 is referenced in approval procedures in Europe and Florida DOT, it is imperative to have representatives of approval bodies and FDOT actively involved into the review.
First name Last name Country Affiliation David Fernández-Ordóñez Switzerland fib Adrian Gnägi Switzerland VSL International Ltd. Hans Rudolf Ganz Switzerland Ganz Consulting Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Gordon Clark United Kingdom Consultant Haifeng Fan Switzerland BBR Vt International Ltd. Kiyotaka Hosoi Japan Shinko Wire Company Ltd Tohru Makita Japan Central Nippon Expressway Company Ltd Teddy Theryo United States Florida Department of Transportation Lars Eckfeldt Germany Deutsches Institut für Bautechnik (DIBt) Wilhelm Schneider Austria Austrian Inst. of Constr. Eng. (OIB) Matthias Wild Germany Technical University of München Ivica Zivanovic France Freyssinet Hirokazu Katsuda Japan Sumitomo Electric Industries, Ltd. Johann Kollegger Austria Vienna University of Technology Luca Civati Italy Tensacciai s.r.l.
TG5.12 - Ultra-high strength prestressing steels for post-tensioning kits and stay systems
The goal of sustainability involves a consensus among economic, environmental and social factors. Due to climate change, environmental concerns have increased in society. The construction sector is among the most active high environmental impact sectors. Emissions from building and infrastructure construction are expected to form the single largest category of consumption-based emissions for C40 cities between 2017 and 2050, producing 21% of consumption emissions. As this period is critical for reducing greenhouse gas (GHG) emissions in line with keeping global temperature rise to within 1.5ºC above pre-industrial averages, serious action is needed in this area.
Ultra-High Strength Prestressing (UHSP) strands, namely strands with tensile strength of 2060 to 2360 MPa, has the potential to greatly reduce the quantity of steel necessary in concrete structures.
The goal of new proposed Task Group is the development of a guideline where the key aspects of introducing ultra-high strength strands at different prestressing applications (along with post-tensioning and stay cable systems) i.e. crucial material properties and risk of hydrogen induced stress corrosion failure, design recommendation, system and material testing, quality control, etc. are covered.
First name Last name Country Affiliation Behzad Manshadi Switzerland BBR VT International Ltd David Fernández-Ordóñez Switzerland fib Matus Benovic Slovakia Industrial Steel Wires EMEA Tohru Makita Japan Central Nippon Expressway Company Ltd Ulf Nürnberger Germany University of Stuttgart Chan Park Korea, Republic of COWI Korea Wilhelm Schneider Austria Austrian Inst. of Constr. Eng. (OIB) Matthias Wild Germany Technical University of München
TG5.13 - Grouting of tendons in prestressed concrete
Prestressed Concrete is a very efficient form of construction; it takes advantage of the strength of concrete in compression. Developed mainly over the second part of the 20th century, it has proven to be reliable and durable. However, in the 1990's some cause for concern was discovered, first in the UK and followed by many other countries of the world. It appeared that the grout, an important means of protection of the steel against corrosion for internally ducted tendons, was in some cases inadequate.
The goal of new proposed Task Group is the development of a Guide to good practice. As the first proposal, the document will cover the same topics as the original bulletin 20.
First name Last name Country Affiliation Guillermo Ramirez Switzerland VSL International Ltd David Fernández-Ordóñez Switzerland fib Carmen Andrade Spain Centre Internacional de Mètodes Numèrics en l’Ènginyeria (CIMNE) Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Hans Rudolf Ganz Switzerland Ganz Consulting Christian Gläser Germany DYWIDAG-Systems International Behzad Manshadi Switzerland BBR VT International Ltd Teddy Theryo United States Florida Department of Transportation Mariela Cordero Verge Spain MK4 WORLD WIDE, S.L. Brian Merrill United States Wiss, Janney, Elstner Associates, Inc. Alex Gutsch Germany MPA Braunschweig