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|
|George||Katergarakis||South Africa||Scaw Wire and Strand|
|Thore||Hagberg||Norway||Dr.Ing. Thore Hagberg A.S.|
|Milan||Chandoga||Slovakia||Projstar PK, s.r.o.|
|Theodore||Neff||United States||Post Tensioning Institute|
|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|
|Stijn||Matthys||Belgium||Magnel Lab. for Concrete Research|
|Teddy||Theryo||United States||Florida Department of Transportation|
|Hermann||Weiher||Germany||matrics engineering GmbH|
|Manuel||Elices Calafat||Spain||Universidad Politecnica de Madrid|
|Jaime||Gálvez Ruiz||Spain||Universidad Politecnica de Madrid|
|Jan||Piekarski||Poland||BBR Polska Sp. z o. o.|
|Oscar||Schaaf||Netherlands||TNO Bouw en Ondergrond|
- 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
- TG5.7 - An owner’s guide to demolition of concrete structures
- 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 - - - - Luc Taerwe Belgium Ghent University 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 Adorján Borosnyói Hungary Budapest Univ. Technology Viktor Gribniak Lithuania Vilnius Gediminas Technical University Stavroula Pantazopoulou Cyprus Demokritus Univ. of Thrace Emidio Nigro Italy - Andreea Serbescu United Kingdom University of Sheffield+ Amey consulting Dionysios Bournas United Kingdom Nottingham Cristina Barris Spain University of Girona Valter Carvelli Italy - Tommaso D’Antino Greece University of Patras Emmanuel Ferrier France - Juan Manuel Gallego Switzerland - Reyes Garcia Spain IDEAM SA Marcin Haffke Germany - Tomislav Kisicek Croatia - Cristina Mias Oller Spain - Nicola Nistico Italy - Alessandro Proia Belgium - Theodoros Rousakis Greece Democritus University of Thrace Andreas Schmitt Germany - José Manuel de Sena Cruz Portugal - Ted Donchev United Kingdom - Vitauts Tamuzs Latvia University of Latvia Nicolae Taranu Romania - Georgia Thermou Greece Aristotle University of Thessaloniki Matthias Pahn Germany - Eva Scharfenberg Germany FIREP Rebar Technology GmbH Francesco Esposito Italy ATP s.r.l Miroslav Cerny Czech Republic - Wolfgang Finckh Germany - Michael Karantzikis Greece - Christoforos Kolyvas Greece FYFE EUROPE S.A. Martin Kurth Germany - Gabriel Sas Sweden Lulea University of Technology/NORUT Carol Shield United States - Lander Vasseur Belgium - Chris Burgoyne United Kingdom Univ. of Cambridge Douglas Gremel United States Hughes Brothers 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 - 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 Andreas Winistörfer Switzerland Carbo Link Gerhard Zehetmaier Germany Bilfinger Berger L. Juvandes Portugal Universidade do Porto Laura de Lorenzis Italy University of Salento Björn Täljsten Sweden - Jonathan Shave United Kingdom - I.E. Harik United States - Ryan Koch United States - 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 - Maria Rosaria Pecce Italy Università del Sannio Dick Hordijk Netherlands Adviesbureau Hageman Andrea Prota Italy Universita di Napoli Federico II Maurizio Guadagnini United Kingdom University of Sheffield 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 Sándor Sólyom Hungary Budapest Univ. of Techn. & Economics Joaquim Barros Portugal Universidade do Minho Kurt Borchert Germany Jacobs Projects GmbH B. Kriekemans Belgium Fortius Stijn Matthys Belgium Magnel Lab. for Concrete Research Giorgio Monti Italy Sapienza Università di Roma 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 Tamon Ueda Japan Hokkaido University 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 Dmitry Kuzevanov Russian Federation NIIZHB Steven Nolan United States Florida Department of Transportation
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 Josée Bastien Canada University Laval Theo Breedijk Netherlands - Guanglu Lu China Tongji University S. A. Madatjan Russia, Federation of Open Joint Stock Company Mark Turner Australia M. D. Turner Consulting Pty. Ltd. Jean-François Guitonneau France - Louis-Jean Hollebecq France - Ulf Nürnberger Germany University of Stuttgart Silvino Pompeu Santos Portugal - Tormod Dyken Norway - Thore Hagberg Norway Dr.Ing. Thore Hagberg A.S. Steven McCabe United States Nat. Inst. of Standards & Technologies Albin Kenel Switzerland Hochschule Rapperswil Manuel Elices Calafat Spain Universidad Politecnica de Madrid David Fernández-Ordóñez Switzerland fib Larry Krauser United States General Technologies, Inc.
TG5.3 - Manual for prestressing materials and systems
Task Group 5.3 is preparing a compact manual for prestressing materials and systems. It may contain, but is not limited to, items such as specifications, recommendations for prestressing tendons for posttensioning, analysis and design of post-tensioned structures, and possibly helpful suggestions to overcome specific problems in installation and use. However, the document is not intended to be a textbook on basic principles and theory of prestressed concrete. Where appropriate, the user will be referred to available textbooks. Because of the rapidly changing technology it might become necessary to review and update this manual from time to time (every four to eight years).
First name Last name Country Affiliation - - - - Josée Bastien Canada University Laval J. L. Bringer France Freyssinet Pierre Boitel France Freyssinet Theodore Neff United States Post Tensioning Institute Guillermo Ramirez Switzerland VSL International Ltd Randall Poston United States Pivot Engineers David Fernández-Ordóñez Switzerland fib
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 - - - - Josée Bastien Canada University Laval Ulf Nürnberger Germany University of Stuttgart Javier Ripoll Garcia-Mansilla Spain Ripoll Consulting de Ing. Cyril Gaucherand France - Gosta Ericson Sweden - Donald Bruce United States - Mark Sinclair Australia - Horst Aschenbroich Canada - Michael Glassl Germany - Kay Löffler Germany - Tony Barley United Kingdom - Hiroshi Yamada Japan - Stephen Cartney COM_COMMUNITY_LANG_NAME_ - Devon Mothersille United Kingdom - Theodore Neff United States Post Tensioning Institute Hermann Weiher Germany matrics engineering GmbH David Fernández-Ordóñez Switzerland fib
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. Peter Curran United Kingdom Ramboll UK Gregor Fischer 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 Milan Chandoga Slovakia Projstar PK, s.r.o. Theodore Neff United States Post Tensioning Institute 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 Jan Winkler Denmark Atkins Christian Gläser Germany DYWIDAG-Systems International Alex Gutsch Germany TU Braunschweig Teddy Theryo United States Florida Department of Transportation Hermann Weiher Germany matrics engineering GmbH Pedro A. de Oliveira Almeida Brazil Sao Paulo University Hiroshi Mutsuyoshi Japan Saitama University Jan Piekarski Poland BBR Polska Sp. z o. o. David Fernández-Ordóñez Switzerland fib
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 - Josef Rötzer Germany DYWIDAG Lucie Vandewalle Belgium Catholic University Leuven Adrian Gnägi Switzerland VSL International Ltd. Antonio Caballero Switzerland BBR VT international Ltd. Markus Traute Germany DYWIDAG-Systems International Tommaso Ciccone Italy TENSA (Tensacciai s.r.l.) Christian Gläser Germany DYWIDAG-Systems International Alex Gutsch Germany TU Braunschweig 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
TG5.7 - An owner’s guide to demolition of concrete structures
There is general agreement that the 1982 FIP report, “Demolition of reinforced and prestressed concrete structures” should be reviewed and updated. The group is of the opinion that the most important issues to be addressed are relevant principally to owners of buildings and not a presentation of various demolition techniques.
First name Last name Country Affiliation - - - - Robert Jansson Sweden - Teddy Theryo United States Florida Department of Transportation David Fernández-Ordóñez Switzerland fib
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 Milan Chandoga Slovakia Projstar PK, s.r.o. Guillermo Ramirez Switzerland VSL International Ltd Wanxu Zhu China Liuzhou OVM Machinery Co. Christian Gläser Germany DYWIDAG-Systems International Hermann Weiher Germany matrics engineering GmbH 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.
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 - - - - Hans Rudolf Ganz Switzerland Ganz Consulting Carmen Andrade Spain Instituto Eduardo Torroja David Fernández-Ordóñez Switzerland fib