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|
|Ganz||Hans Rudolf||Switzerland||Ganz Consulting|
|Kasuga||Akio||Japan||Sumitomo Mitsui Construction Co.Ltd.|
|Nürnberger||Ulf||Germany||University of Stuttgart|
|Hosoi||Kiyotaka||Japan||Shinko Wire Company Ltd|
|Almeida||Pedro A. de Oliveira||Brazil||Sao Paulo University|
|Hagberg||Thore||Norway||Dr.Ing. Thore Hagberg A.S.|
|Krauser||Larry||United States||General Technologies, Inc.|
|Ciccone||Tommaso||Italy||TENSA (Tensacciai s.r.l.)|
|Caballero||Antonio||Switzerland||BBR VT international Ltd.|
|Ramirez||Guillermo||Switzerland||VSL International Ltd|
|Poston||Randall||United States||Pivot Engineers|
|Theryo||Teddy||United States||Florida Department of Transportation|
|Elices Calafat||Manuel||Spain||Universidad Politecnica de Madrid|
|Piekarski||Jan||Poland||BBR Polska Sp. z o. o.|
|Neff||Theodore||United States||General Technologies, Inc.|
|Neff||Theodore||United States||General Technologies, Inc.|
|Gálvez Ruiz||Jaime||Spain||Universidad Politecnica de Madrid|
|Gregory||Paul||United Kingdom||MPA - The Concrete Centre|
|Weiher||Hermann||Germany||Matrics Engineering GmbH|
|Kido||Toshiro||Japan||Sumitomo (SEI) Steel Wire Corp.|
|Piron||Josiane||Belgium||Ministry of Equip. and Transport|
|Valentini||Vittorio||Italy||Siderurgica Latina Martin S.p.A.|
- 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
- TG5.6 - 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 Balázs György L. Hungary Budapest Univ. of Techn. & Economics Ceroni Francesca Italy Universitá degli Studi di Napoli Denton Steve United Kingdom WSP Parsons Brinckerhoff Ltd Pantazopoulou Voula (S.J.) Canada The Lassonde Faculty of Engineering, York University Nigro Emidio Italy Università degli Studi di Napoli Federico II Serbescu Andreea United Kingdom University of Sheffield+ Amey consulting Bournas Dionysios United Kingdom Nottingham University Barris Cristina Spain University of Girona Carvelli Valter Italy Politecnico di Milano D’Antino Tommaso Greece University of Patras Ferrier Emmanuel France Université Lyon 1 Gallego Juan Manuel Spain - Garcia Lopez Reyes United Kingdom School of Engineering, University of Warwick Haffke Marcin Germany TU Kaiserslautern Kisicek Tomislav Croatia University of Zagreb Mias Oller Cristina Spain University of Girona Nistico Nicola Italy Sapienza Università di Roma Proia Alessandro Belgium Ghent University Schmitt Andreas Germany TU Kaiserslautern de Sena Cruz José Manuel Portugal University of Minho Donchev Ted United Kingdom Kingston University Tamuzs Vitauts Latvia University of Latvia Taranu Nicolae Romania TU “Gh. Asachi” Iasi Pahn Matthias Germany University of Kaiserslautern Scharfenberg Eva Germany FIREP Rebar Technology GmbH Esposito Francesco Italy ATP s.r.l Cerny Miroslav Czech Republic Czech Technical University in Prague Finckh Wolfgang Germany Wayss & Freytag Ingenieurbau Karantzikis Michael Greece FYFE EUROPE S.A. Kolyvas Christoforos Greece FYFE EUROPE S.A. Kurth Martin Germany RWTH Aachen University Sas Gabriel Sweden Lulea University of Technology/NORUT Shield Carol United States University of Minnesota Vasseur Lander Belgium Bureau d’études Vasseur sprl Burgoyne Chris United Kingdom Univ. of Cambridge Gremel Douglas United States Owens Corning Hamelin Patrice France Université Lyon Manfredi Gaetano Italy Universita di Napoli Federico II Nanni Antonio Italy Univ. degli Studi di Napoli Federico II Niedermeier Roland Germany Technische Universität München Pisani Marco Italy Politecnico di Milano Rizkalla Sami United States North Carolina State Univ. Teng Jin-Guang China Hong Kong Polytechnic University Thorenfeldt Erik Norway SINTEF Building & Infrastructure Zehetmaier Gerhard Germany Bilfinger Berger Juvandes L. Portugal Universidade do Porto de Lorenzis Laura Italy University of Salento Täljsten Björn Sweden Luleå University of Technology Shave Jonathan United Kingdom Parsons Brinckerhoff Ltd. Harik I.E. United States University of Kentucky Koch Ryan United States Hughes Brothers Palmieri Aniello Belgium Superior Products Europe Ibell T.J. United Kingdom University of Bath Meier Urs Switzerland EAWAG-EMPA Schürch Marc Switzerland FiReP International AG Vervuurt Adri Netherlands TNO Tadros Maher United States University of Nebraska-Lincoln Pecce Maria Rosaria Italy Università del Sannio Hordijk Dick Netherlands Adviesbureau Hageman Prota Andrea Italy Universita di Napoli Federico II Berset Thierry Switzerland SIKA Services AG Curbach Manfred Germany Technische Univ. Dresden Füllsack-Köditz Raimo Germany Halfen Group Hegger Josef Germany RWTH Aachen Pilakoutas Kypros United Kingdom University of Sheffield Zilch Konrad Germany - Bilotta Antonio Italy University of Naples Federico II Borchert Kurt Germany Jacobs Projects GmbH Ospina Carlos United States BergerABAM Smith Scott Australia The University of Adelaide Thorhallsson Eythor Iceland Reykjavik University Weber André Germany Schöck Bauteile GmbH Di Benedetti Matteo United Kingdom University of Sheffield Cholostiakow Szymon United Kingdom University of Sheffield Triantafillou Thanasis Greece University of Patras Matthews Stuart United Kingdom Consulting Oller Ibars Eva Spain Technical University of Catalonia Fernández-Ordóñez David Switzerland fib Torres Lluis Spain University of Girona Kriekemans B. Belgium Fortius Sólyom Sándor Hungary Budapest Univ. of Techn. & Economics Mellier Erik France Freyssinet International & Cie Buchin Roulie Vanessa Switzerland VSL INTERNATIONAL Monti Giorgio Italy Sapienza Università di Roma Gribniak Viktor Lithuania Vilnius Gediminas Technical University Ueda Tamon China Shenzhen University Matthys Stijn Belgium Ghent University Borosnyói Adorján Hungary Budapest Univ. Technology Kotynia Renata Poland Technical University of Lodz Raicic Vesna United Kingdom University of Bath Veljkovic Ana Italy Politecnico di Milano Chen J. F. United Kingdom Edinburgh University Vago Giuseppe Italy ATP s.r.l Guadagnini Maurizio United Kingdom University of Sheffield Rousakis Theodoros Greece Democritus University of Thrace Koutas Lampros Greece University of Thessaly Winistörfer Andreas Switzerland Carbo Link Barros Joaquim Portugal Universidade do Minho Thermou Georgia United Kingdom University of Nottingham Verbaten Mark Netherlands ABT bv Zheng Yu China -
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 Ganz Hans Rudolf Switzerland Ganz Consulting Nürnberger Ulf Germany University of Stuttgart Hagberg Thore Norway Dr.Ing. Thore Hagberg A.S. McCabe Steven United States Nat. Inst. of Standards & Technologies Elices Calafat Manuel Spain Universidad Politecnica de Madrid Fernández-Ordóñez David Switzerland fib Krauser Larry United States General Technologies, Inc. Burridge Jenny United Kingdom The Concrete Centre Cairns John United Kingdom Heriot-Watt University Gregory Paul United Kingdom MPA - The Concrete Centre Piron Josiane Belgium Ministry of Equip. and Transport Camci Ladin United Kingdom CARES Clark Gordon United Kingdom Consultant Eligehausen Rolf Germany IWB, Universität Stuttgart Goodchild Charles United Kingdom The Concrete Centre Gustafson David United States CRSI - Concrete Reinforcing Steel Junge Sven Germany ISB Institut für Stahlbetonbewehrung e.V. Keogh Dennis United Kingdom Laing O’Rourke Infrastructure Services Truby Andrew United Kingdom Truby Stevenson Ltd
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 Ramirez Guillermo Switzerland VSL International Ltd Fernández-Ordóñez David Switzerland fib Neff Theodore United States General Technologies, Inc. Neff Theodore United States General Technologies, Inc. Ciccone Tommaso Italy TENSA (Tensacciai s.r.l.) Collins James United Kingdom Ramboll Kido Toshiro Japan Sumitomo (SEI) Steel Wire Corp. Zivanovic Ivica France Freyssinet Castiglioni di Caronno Andrea Italy TENSA (Tensacciai s.r.l.) Gläser Christian Germany DYWIDAG-Systems International Hayek Carol United States CCL Hosoi Kiyotaka Japan Shinko Wire Company Ltd Ikehata Shinya Japan Central Nippon Expressway Cie Ltd Krauser Larry 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 Nürnberger Ulf Germany University of Stuttgart Ripoll Garcia-Mansilla Javier Spain Ripoll Consulting de Ing. Gaucherand Cyril France Freyssinet Ericson Gosta Sweden Sweco VBB AB Sinclair Mark Australia Structural Systems (Civil) Pty Ltd Fernández-Ordóñez David Switzerland fib Neff Theodore United States General Technologies, Inc. Neff Theodore United States General Technologies, Inc. Irvin Chris United Kingdom DYWIDAG-SYSTEMS INTERNATIONAL Ltd. Ryser Matthias Germany Dr. Vollenweider AG Weiher Hermann Germany Matrics Engineering GmbH Kido Toshiro Japan Sumitomo (SEI) Steel Wire Corp. Egger Philipp Switzerland VSL International LTD Manshadi Behzad Switzerland BBR VT International Ltd Wild Matthias Germany Technical University of München Gnägi Adrian 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 Bastien Josée Canada University Laval Kasuga Akio Japan Sumitomo Mitsui Construction Co.Ltd. Fischer Gregor Denmark Technical University of Denmark Hosoi Kiyotaka Japan Shinko Wire Company Ltd Ohashi Gaku Japan Central Nippon Expressway Company Ltd Georgakis Christos Denmark Technical University of Denmark Wild Matthias Germany Technical University of München Tejera Adrian Spain Tycsa PSC Spain Kuilboer Cor Netherlands Private Goodyear David United States T.Y. Lin International Soule Ben United States International Bridge Technologies, Inc Ciccone Tommaso Italy TENSA (Tensacciai s.r.l.) Brand Werner Germany DYWIDAG-Systems International Caballero Antonio Switzerland BBR VT international Ltd. Annan Rachid Switzerland VSL International LTD Meiss Kathy Germany Ingenieurgesellschaft Meiss Grauer Holl mbh & Co. KG Gläser Christian Germany DYWIDAG-Systems International Theryo Teddy United States Florida Department of Transportation Almeida Pedro A. de Oliveira Brazil Sao Paulo University Piekarski Jan Poland BBR Polska Sp. z o. o. Fernández-Ordóñez David Switzerland fib Neff Theodore United States General Technologies, Inc. Neff Theodore United States General Technologies, Inc. Mellier Erik France Freyssinet International & Cie Winkler Jan Denmark Atkins Mutsuyoshi Hiroshi Japan Saitama University Weiher Hermann Germany Matrics Engineering GmbH Gutsch Alex Germany TU Braunschweig Kido Toshiro Japan Sumitomo (SEI) Steel Wire Corp. Ikehata Shinya Japan Central Nippon Expressway Cie Ltd Curran Peter 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 Bastien Josée Canada University Laval Wild Matthias Germany Technical University of München Tejera Adrian Spain Tycsa PSC Spain Zivanovic Ivica France Freyssinet Rötzer Josef Germany DYWIDAG Gnägi Adrian Switzerland VSL International Ltd. Caballero Antonio Switzerland BBR VT international Ltd. Traute Markus Germany DYWIDAG-Systems International Gläser Christian Germany DYWIDAG-Systems International Elices Calafat Manuel Spain Universidad Politecnica de Madrid Nishizaki Takeyoshi Japan Osaka Gas Company Benovic Matus Slovakia Industrial Steel Wires EMEA Fernández-Ordóñez David Switzerland fib Krauser Larry United States General Technologies, Inc. Sakai Yasuhiro Japan Obayashi Corporation Gutsch Alex Germany TU Braunschweig Kido Toshiro Japan Sumitomo (SEI) Steel Wire Corp. Vandewalle Lucie Belgium KULeuven Freitas Jeovan Norway Private
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 Bastien Josée Canada University Laval Kasuga Akio Japan Sumitomo Mitsui Construction Co.Ltd. Theryo Teddy United States Florida Department of Transportation Turmo Coderque José Spain Universitat Politecnica de Catalunya Boitel Pierre France Freyssinet Kuilboer Cor Netherlands Private Matt Peter Switzerland Private Ramirez Guillermo Switzerland VSL International Ltd Zhu Wanxu China Liuzhou OVM Machinery Co. Gläser Christian Germany DYWIDAG-Systems International Xu Dong China Tongji University Piekarski Jan Poland BBR Polska Sp. z o. o. Ganz Hans Rudolf Switzerland Ganz Consulting Fernández-Ordóñez David Switzerland fib Krauser Larry United States General Technologies, Inc. Weiher Hermann Germany Matrics Engineering GmbH Kido Toshiro 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 Andrade Carmen Spain Instituto Eduardo Torroja Fernández-Ordóñez David Switzerland fib