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 A. de Oliveira||Almeida||Brazil||Sao Paulo University|
|Thore||Hagberg||Norway||Dr.Ing. Thore Hagberg A.S.|
|Larry||Krauser||United States||General Technologies, Inc.|
|Tommaso||Ciccone||Italy||TENSA (Tensacciai s.r.l.)|
|Antonio||Caballero||Switzerland||BBR VT international Ltd.|
|Guillermo||Ramirez||Switzerland||VSL International Ltd|
|Cesare||Prevedini||Brazil||Protende Sistemas e Métodos de Construcoes|
|Randall||Poston||United States||Pivot Engineers|
|Teddy||Theryo||United States||Florida Department of Transportation|
|Manuel||Elices Calafat||Spain||Universidad Politecnica de Madrid|
|Jan||Piekarski||Poland||BBR Polska Sp. z o. o.|
|Theodore||Neff||United States||General Technologies, Inc.|
|Theodore||Neff||United States||General Technologies, Inc.|
|Jaime||Gálvez Ruiz||Spain||Universidad Politecnica de Madrid|
|Paul||Gregory||United Kingdom||MPA - The Concrete Centre|
|Hermann||Weiher||Germany||matrics engineering GmbH|
|Toshiro||Kido||Japan||Sumitomo (SEI) Steel Wire Corp.|
|Stijn||Matthys||Belgium||Magnel Lab. for Concrete Research|
|Josiane||Piron||Belgium||Ministry of Equip. and Transport|
|Vittorio||Valentini||Italy||Siderurgica Latina Martin S.p.A.|
- TG5.1 - FRP Reinforcement for concrete structures
- TG5.2 - Reinforcing steels and systems
- TG5.3 - Manual for prestressing materials and systems
- TG5.4 - Recommendations for ground anchor systems
- TG5.5 - Cables for cable-supported bridges
- TG5.6 - Behaviour under cryogenic conditions
- TG5.8 - External tendons for bridges
- TG5.9 - Sulphates and sulphide limits in grout and concrete for prestressing
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.
First name Last name Country Affiliation - - - - György L. Balázs Hungary Budapest Univ. of Techn. & Economics Francesca Ceroni Italy Universitá degli Studi di Napoli Steve Denton United Kingdom WSP Parsons Brinckerhoff Ltd Voula (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 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 Juan Manuel Gallego Spain - Reyes Garcia Lopez United Kingdom School of Engineering, University of Warwick Marcin Haffke Germany TU Kaiserslautern Tomislav Kisicek Croatia University of Zagreb Cristina Mias Oller Spain University of Girona Nicola Nistico Italy Sapienza Università di Roma Alessandro Proia Belgium Ghent University Andreas Schmitt Germany TU Kaiserslautern José Manuel de Sena Cruz Portugal University of Minho Ted Donchev United Kingdom Kingston University Vitauts Tamuzs Latvia University of Latvia Nicolae Taranu Romania TU “Gh. Asachi” Iasi Matthias Pahn Germany University of Kaiserslautern Eva Scharfenberg Germany FIREP Rebar Technology GmbH Francesco Esposito Italy ATP s.r.l Miroslav Cerny Czech Republic Czech Technical University in Prague Wolfgang Finckh Germany Wayss & Freytag Ingenieurbau Michael Karantzikis Greece FYFE EUROPE S.A. Christoforos Kolyvas Greece FYFE EUROPE S.A. Martin Kurth Germany RWTH Aachen University Gabriel Sas Sweden Lulea University of Technology/NORUT Carol Shield United States University of Minnesota Lander Vasseur Belgium Bureau d’études Vasseur sprl Chris Burgoyne United Kingdom Univ. of Cambridge Douglas Gremel United States Owens Corning Patrice Hamelin France Université Lyon Gaetano Manfredi Italy Universita di Napoli Federico II Antonio Nanni Italy Univ. degli Studi di Napoli Federico II Roland Niedermeier Germany Technische Universität München Marco Pisani Italy Politecnico di Milano Sami Rizkalla United States North Carolina State Univ. Jin-Guang Teng China Hong Kong Polytechnic University Erik Thorenfeldt Norway SINTEF Building & Infrastructure Gerhard Zehetmaier Germany Bilfinger Berger L. Juvandes Portugal Universidade do Porto Laura de Lorenzis Italy University of Salento Björn Täljsten Sweden Luleå University of Technology Jonathan Shave United Kingdom Parsons Brinckerhoff Ltd. I.E. Harik United States University of Kentucky Ryan Koch United States Hughes Brothers Aniello Palmieri Belgium Superior Products Europe T.J. Ibell United Kingdom University of Bath Benjamin Jütte Germany Schöck Bauteile GmbH Urs Meier Switzerland EAWAG-EMPA Marc Schürch Switzerland FiReP International AG Adri Vervuurt Netherlands TNO Maher Tadros United States University of Nebraska-Lincoln Maria Rosaria Pecce Italy Università del Sannio Dick Hordijk Netherlands Adviesbureau Hageman Andrea Prota Italy Universita di Napoli Federico II Thierry Berset Switzerland SIKA Services AG Manfred Curbach Germany Technische Univ. Dresden Raimo Füllsack-Köditz Germany Halfen Group Josef Hegger Germany RWTH Aachen Kypros Pilakoutas United Kingdom University of Sheffield Konrad Zilch Germany Private Antonio Bilotta Italy University of Naples Federico II Joaquim Barros Portugal Universidade do Minho Kurt Borchert Germany Jacobs Projects GmbH Carlos Ospina United States BergerABAM Scott Smith Australia Southern Cross University Eythor Thorhallsson Iceland Reykjavik University André Weber Germany Schöck Bauteile GmbH Matteo Di Benedetti United Kingdom University of Sheffield Szymon Cholostiakow United Kingdom University of Sheffield Thanasis Triantafillou Greece University of Patras Stuart Matthews United Kingdom Building Research Establishment Ltd Eva Oller Ibars Spain Technical University of Catalonia David Fernández-Ordóñez Switzerland fib Lluis Torres Spain University of Girona Christoph Czaderski-Forchmann Switzerland EMPA, Structural Engineering B. Kriekemans Belgium Fortius Sándor Sólyom Hungary Budapest Univ. of Techn. & Economics Erik Mellier France Freyssinet International & Cie Georgia Thermou Greece Aristotle University of Thessaloniki Vanessa Buchin Roulie Switzerland VSL INTERNATIONAL Mark Verbaten Netherlands ABT bv Giorgio Monti Italy Sapienza Università di Roma Viktor Gribniak Lithuania Vilnius Gediminas Technical University Tamon Ueda Japan Hokkaido University Stijn Matthys Belgium Magnel Lab. for Concrete Research Adorján Borosnyói Hungary Budapest Univ. Technology Renata Kotynia Poland Technical University of Lodz Vesna Raicic United Kingdom University of Bath Ana Veljkovic Italy Politecnico di Milano J. F. Chen United Kingdom Edinburgh University Giuseppe Vago Italy ATP s.r.l Maurizio Guadagnini United Kingdom University of Sheffield Theodoros Rousakis Greece Democritus University of Thrace Lampros Koutas Greece Private Andreas Winistörfer Switzerland Carbo Link
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. Jenny Burridge United Kingdom The Concrete Centre John Cairns United Kingdom Heriot-Watt University Paul Gregory United Kingdom MPA - The Concrete Centre Josiane Piron Belgium Ministry of Equip. and Transport Ladin Camci United Kingdom CARES Gordon Clark United Kingdom Consultant Rolf Eligehausen Germany IWB, Universität Stuttgart Charles Goodchild United Kingdom The Concrete Centre 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
TG5.3 - Manual for 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 - - - - J. L. Bringer France Freyssinet Guillermo Ramirez Switzerland VSL International Ltd David Fernández-Ordóñez Switzerland fib Theodore Neff United States General Technologies, Inc. Theodore Neff United States General Technologies, Inc. Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) James Collins United Kingdom Ramboll Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp. Ivica Zivanovic France Freyssinet Andrea Castiglioni di Caronno 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 Cie Ltd Larry Krauser United States General Technologies, Inc.
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. 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 Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp. 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.
TG5.5 - Cables for cable-supported bridges
fib Bulletin 30, "Acceptance of stay cable systems using prestressing steels", was published in 2005. Since then, extradosed bridges, a bridge typology that is placed between cable-stayed bridges and ordinary girder bridges, became more and more popular. While extradosed bridges were already known at the time of publication of Bulletin 30, the knowledge was not enough to include this typology into the document.
Additionally, after more than seven years, there is a general request from system suppliers, designers and authorities to update the current document so new stay cable system/solutions, applications, acquired knowledge, installation methods, etc. are discussed and included in a new document version.
The goal of Task Group 5.5 (TG5.5) is to update the current recommendation document so extradosed bridges are fully included (e.g. loading over SLS design, loading over ULS design, design & detailing, construction, initial type testing, etc.).
First name Last name Country Affiliation - - - - Josée Bastien Canada University Laval Akio Kasuga Japan Sumitomo Mitsui Construction Co.Ltd. Gregor Fischer Denmark Technical University of Denmark Kiyotaka Hosoi Japan Shinko Wire Company Ltd Gaku Ohashi Japan Central Nippon Expressway Company Ltd Christos Georgakis Denmark Technical University of Denmark Matthias Wild Germany Technical University of München Adrian Tejera Spain Tycsa PSC Spain Cor Kuilboer Netherlands Private David Goodyear United States T.Y. Lin International Ben Soule United States International Bridge Technologies, Inc Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Werner Brand Germany DYWIDAG-Systems International Antonio Caballero Switzerland BBR VT international Ltd. Rachid Annan Switzerland VSL International LTD Kathy Meiss Germany Ingenieurgesellschaft Meiss Grauer Holl mbh & Co. KG Christian Gläser Germany DYWIDAG-Systems International Teddy Theryo United States Florida Department of Transportation Pedro A. de Oliveira Almeida Brazil Sao Paulo University Jan Piekarski Poland BBR Polska Sp. z o. o. David Fernández-Ordóñez Switzerland fib Theodore Neff United States General Technologies, Inc. Theodore Neff United States General Technologies, Inc. Erik Mellier France Freyssinet International & Cie Jan Winkler Denmark Atkins Hiroshi Mutsuyoshi Japan Saitama University Hermann Weiher Germany matrics engineering GmbH Alex Gutsch Germany TU Braunschweig Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp. Shinya Ikehata Japan Central Nippon Expressway Cie Ltd Peter Curran United Kingdom Ramboll UK
TG5.6 - Behaviour under cryogenic conditions
The growing worldwide use of liquefied natural gas (LNG) has seen the development of significant LNG storage tank facilities for LNG exporters and importers. These massive storage tanks are essential for receiving and safe storage of the liquid gas. Despite this, the last FIP publication on prestressed concrete under cryogenic conditions dates back to 1988 (draft state-of-the-art report – Cryogenic behavior of materials for prestressed concrete).
The main goal of fib Task Group 5.6 (TG5.6) is the development of a new fib recommendation document in which key aspects in concrete prestressed LNG tanks such as design recommendations, execution, system and material testing, control/monitoring, etc., are covered.
First name Last name Country Affiliation - - - - Josée Bastien Canada University Laval Matthias Wild Germany Technical University of München Adrian Tejera Spain Tycsa PSC Spain Ivica Zivanovic France Freyssinet Josef Rötzer Germany DYWIDAG Adrian Gnägi Switzerland VSL International Ltd. Antonio Caballero Switzerland BBR VT international Ltd. Markus Traute Germany DYWIDAG-Systems International Christian Gläser Germany DYWIDAG-Systems International Manuel Elices Calafat Spain Universidad Politecnica de Madrid Takeyoshi Nishizaki Japan Osaka Gas Company Matus Benovic Slovakia Industrial Steel Wires EMEA David Fernández-Ordóñez Switzerland fib Larry Krauser United States General Technologies, Inc. Yasuhiro Sakai Japan Obayashi Corporation Alex Gutsch Germany TU Braunschweig Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp. Lucie Vandewalle Belgium KULeuven
TG5.8 - External tendons for bridges
As a result of durability issues with bonded internal tendons, external tendons in bridge construction have become more popular in several countries. External tendons are now widely used throughout the world. While many of the technological aspects of external tendons look similar to internal bonded tendons, there are significant differences between the two, e.g. in terms of corrosion protection, tendon deviation blocks, tendon curvature and lay out, tendon replaceability, tendon force transfer to the structure, and ultimate strength. These differences merit the amendment of existing specifications, or the preparation of new specifications for external tendon design, testing, installation, duct durability, corrosion protection, maintenance and eventual replacement.
The goal of Task Group 5.8 (TG5.8) is to prepare a technical report on the applications of external tendons in bridges from different countries and focusing on system related topics with minor implementation of design aspects of the structure using external tendons.
First name Last name Country Affiliation - - - - Josée Bastien Canada University Laval Akio Kasuga Japan Sumitomo Mitsui Construction Co.Ltd. Teddy Theryo United States Florida Department of Transportation José Turmo Coderque Spain Universitat Politecnica de Catalunya Pierre Boitel France Freyssinet Cor Kuilboer Netherlands Private Peter Matt Switzerland Private Guillermo Ramirez Switzerland VSL International Ltd Wanxu Zhu China Liuzhou OVM Machinery Co. Christian Gläser Germany DYWIDAG-Systems International Dong Xu China Tongji University Jan Piekarski Poland BBR Polska Sp. z o. o. Hans Rudolf Ganz Switzerland Ganz Consulting David Fernández-Ordóñez Switzerland fib Larry Krauser United States General Technologies, Inc. Hermann Weiher Germany matrics engineering GmbH Toshiro Kido Japan Sumitomo (SEI) Steel Wire Corp.
TG5.9 - Sulphates and sulphide limits in grout and concrete for prestressing
Over recent years some significant work has gone into improving grouting specifications around the world. Of particular concern is that historically there have been limits set for the Sulphate and Sulphide Ion content in some countries (in EN and ISO) but not in others. Further, high sulphate levels in grout have been identified as a contributing factor in premature corrosion observed on several post-tensioned bridges in the United States. After considerable searching there appears to be no available published relevant research to support current limits. Further there is increased pressure to use slag cements, for reasons of sustainability, which cannot pass the current limitations. There is clear justification to form a scientific research basis for any limits both in grout and in concrete for pretensioned prestressed applications.
fib can collect the current State-of-the-Art of such limits and any background research. It is also proposed to initiate an appropriate research project. This will inform either a Technical Report or Research Papers for publication, as well as informing possible revisions of National and International standards.
First name Last name Country Affiliation - - - - Carmen Andrade Spain Instituto Eduardo Torroja David Fernández-Ordóñez Switzerland fib