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|
|Guillermo||Ramirez||Switzerland||VSL International Ltd|
|Randall||Poston||United States||Pivot Engineers|
|Teddy||Theryo||United States||Florida Department of Transportation|
|Manuel||Elices Calafat||Spain||Universidad Politecnica de Madrid|
|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.|
- 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
- TG5.8 - External tendons for bridges
- TG5.10 - Inspection and monitoring of reinforced/prestressed concrete structures
- TG5.11 - Polymer-duct systems for internal bonded post-tensioning
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
First name Last name Country Affiliation György L. Balázs Hungary Budapest Univ. of Techn. & Economics Francesca Ceroni Italy Universitá degli Studi di Napoli 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 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 Marcin Haffke Germany TU Kaiserslautern 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 Matthias Pahn Germany University of Kaiserslautern Francesco Esposito Italy ATP s.r.l Christoforos Kolyvas Greece FYFE EUROPE S.A. Douglas Gremel United States Owens Corning Antonio Nanni Italy Univ. degli Studi di Napoli Federico II Björn Täljsten Sweden Luleå University of Technology 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 - Scott Smith Australia The University of Adelaide 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 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 Giuseppe Vago Italy ATP s.r.l 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 - Tamás Nagy-György Romania Politehnica Univ. of Timisoara 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 Gianmarco de Felice Italy Roma Tre University 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) Valeriu Stoian Romania - 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
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 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 Laure Elias Belgium SPW Mobilité et Infrastructures Matthias Ryser Germany Dr. Vollenweider AG
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 Laure Elias Belgium SPW Mobilité et Infrastructures Francesco Moraglia Italy Tensacciai Srl Luca Civati Italy Tensacciai s.r.l. Jean‐Baptiste Domage Switzerland VSL
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.
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 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
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 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.
TG5.10 - 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
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