Prefabrication plays an important role in the construction of concrete structures worldwide and is evolving continuously to cope with current society’s habits and needs related to housing, commercial buildings and civil engineering works. In fact, industrialised construction may result in cost efficiency, good quality and environmentally friendly solutions, as well as the ability to adapt to market demands.
Scope and objective of technical work
The basic goal of COM6 is to enhance the progress of precast concrete, in relation to the state-of-the-art. The general scope is to promote the understanding of design concepts, technology and use of precast concrete, not only by the specialists but also by a broader audience. The implied objectives are:
- to stimulate and coordinate R&D internationally;
- to transfer the output into planning, practical design and construction, by means of technical reports, state–of-the-art reports, guides to good practice, handbooks;
- to disseminate knowledge through seminars, courses, educational material;
- to contribute to recommendations, pre-normative documents and codes within standardisation bodies.
COM6 addresses subjects that include items directly related to precast concrete, such as systems, elements, connections, production, handling, assembling, demounting, etc., as well as indirectly related items such as structural analysis, materials technology, building physics, equipment, environmental issues, sustainable development, terminology.
|First name||Last name||Country||Affiliation|
|Larbi||Sennour||United States||The Consulting Engineers Gr., Inc.|
|Bruno||Della Bella||Italy||Gruppo Centro Nord|
|Paolo||Riva||Italy||University of Bergamo|
|Pieter||van der Zee||Belgium||Ergon Belgium|
|Paul||Kourajian||United States||Molin Concrete Products Co.|
|Kim||Elliott||United Kingdom||Precast Consultant|
|Sevket||Ozden||Turkey||OTS INSAAT Engineering & Design Co.|
|Micha||Falger||Netherlands||BAM Advies & Engineering|
|N.||Vambersky||Netherlands||Corsmit Raadgevend Ingenieurs|
|Ladislav||Sasek||Czech Republic||Mott MacDonald Praha s.r.o.|
|Arne||Skjelle||Norway||Construction Products Association|
|Michael||Newby||New Zealand||Holmes Consulting Group|
|Ronald||Klein-Holte||Netherlands||VBI Ontwikkeling BV|
|Wit||Derkowski||Poland||Cracow Technical University|
|Sergey||Bronin||Russia, Federation of||PATRIOT-Engineering|
|André||de Chefdebien||France||LB7/Lesage Group|
|Holger||Karutz||Germany||CPI Concrete Plant International|
|Sthaladipti||Saha||India||Larsen & Toubro Ltd|
|Lasse||Rajala||Finland||Sweco Rakennetekniikka Oy|
|Ned||Cleland||United States||Blue Ridge Design|
|Jason||Krohn||United States||PCI - Precast/Prestressed Concrete Institute|
|Carlos||Chastre Rodrigues||Portugal||Universidade Nova de Lisboa|
|Barry||Crisp||Australia||Crisp Consultants PTY Ltd|
|Stefano||Pampanin||New Zealand||University of Canterbury|
|Venkatesh||Seshappa||United States||Gate Precast Company|
|Salyendra||Ghosh||United States||S.K. Ghosh Associates, Inc.|
|Albert||de la Fuente Antequera||Spain||Universidad Polytecnica de Catalunya|
|Válter||Da Guia Lucio||Portugal||Universidade Nova de Lisboa|
|Dean A.||Frank||United States||PCI Precast/Prestressed Concrete Inst.|
|Válter||Da Guia Lucio||Portugal||Universidade Nova de Lisboa|
|Spyros||Tsoukantas||India||Katerra India Pvt. Ltd|
|Mounir||El Debs||Brazil||Univ. Sao Paulo at Sao Carlos|
|Andrzej||Cholewicki||Poland||Building Research Institute (ITB)|
|Subbaiya||Kanappan||India||Larsen & Toubro Ltd|
|Marcelo||Ferreira||Brazil||UFSCAR Federal University of Sao Carlos|
|Válter||Da Guia Lucio||Portugal||Universidade Nova de Lisboa|
|Válter||Da Guia Lucio||Portugal||Universidade Nova de Lisboa|
- TG6.1 - Prestressed hollow core floors
- TG6.2 - Quality control for precast concrete
- TG6.3 - Sustainability of structures with precast elements
- TG6.4 - Precast concrete towers for wind power generators
- TG6.5 - Precast concrete bridges
- TG6.6 - Retrofitting of precast seismic structures
- TG6.7 - Precast concrete in tall buildings
- TG6.8 - Terminology for precast concrete
- TG6.9 - Precast parking structures
TG6.1 - Prestressed hollow core floors
During the last decade, the prestressed hollow core slab itself, the use of the HC slab, the functions of the HC floor and the knowledge on the performances of prestressed hollow core floors in various applications have evolved a great deal, which justifies a complete revision of the design recommendations.
The objective of TG6.1 is to revise the design recommendations for precast pre-stressed hollow core floors according to today’s state of the art.
New subjects will be added to the recommendations, based on practical needs of the stakeholders and experiences gained in several projects in which members of the task group were involved.
First name Last name Country Affiliation - - - - Iria Licia Doniak Brazil ABCIC Bruno Della Bella Italy Gruppo Centro Nord Pieter van der Zee Belgium Ergon Belgium Stef Maas Belgium FEBE Luciano Marcaccioli Italy Officine Piccini SpA Paul Kourajian United States Molin Concrete Products Co. François Huitric France CERIB Matthieu Scalliet France CERIB Eduardo Millen Brazil ZMC Consultores Kim Elliott United Kingdom Precast Consultant Gösta Lindström Sweden AB Strangbetong Ronald Klein-Holte Netherlands VBI Ontwikkeling BV Wit Derkowski Poland Cracow Technical University Lasse Rajala Finland Sweco Rakennetekniikka Oy Barry Crisp Australia Crisp Consultants PTY Ltd Simon Hughes Australia Private Olli Korander Finland Private David Fernández-Ordóñez Switzerland fib Spyros Tsoukantas India Katerra India Pvt. Ltd Andrzej Cholewicki Poland Building Research Institute (ITB) Sergey Bronin Russia, Federation of PATRIOT-Engineering Marcelo Ferreira Brazil UFSCAR Federal University of Sao Carlos
TG6.2 - Quality control for precast concrete
The goal of Task Group 6.2 (TG6.2) is to prepare a state-of-the-art report describing the steps, procedures and rules for the quality control of precast concrete, with respect to both production and product quality, to improve the quality of prefabricated construction.
The report produced is intended to serve as a basic specification guide for plants and produced precast concrete elements, defining a program of quality control to monitor the production by measurement or by comparison to acceptable standards. The following topics will be included:
- plant quality assurance program;
- material and accessories;
- transport and erection;
- recommended testing equipment;
- quality control operations;
First name Last name Country Affiliation - - - - Iria Licia Doniak Brazil ABCIC David Fernández-Ordóñez Switzerland fib Bruno Della Bella Italy Gruppo Centro Nord Stef Maas Belgium FEBE Jaime Fernández Gomez Spain Intemac Juan Carlos Lopez-Agüi Spain IECA Alejandro Lopez-Vidal Spain ANDECE Alessandra Ronchetti Italy ASSOBETON Holger Karutz Germany CPI Concrete Plant International Dean A. Frank United States PCI Precast/Prestressed Concrete Inst.
TG6.3 - Sustainability of structures with precast elements
Sustainability is considered a main aspect for the future of construction therefore for prefabrication as well. COM6 and PCI have had a close cooperation since 2008 on issues of mutual interest, with the comparison of respective approaches and the development of common publications. PCI has produced various works dealing with sustainability of precast structures and is currently developing a large investigation program on this subject. The fib has also developed a large amount of work on sustainability. Presently, the work regarding sustainability is being developed in COM7.
The first activity of TG6.3 will be the study of the most recent work developed on sustainability and in particular Life Cycle Assessment regarding structures where precast concrete elements are used. The elements developed by PCI and the fib as well as by other organisations will be shared.
The final objective will be the drafting of recommendations regarding the study and assessment of precast concrete elements and structures, with respect to sustainability. They will cover all aspects regarding this kind of structures, from planning, design, execution, use, maintenance and remedial activities, up to dismantling, reuse and recycling.
First name Last name Country Affiliation - - - - Iria Licia Doniak Brazil ABCIC David Fernández-Ordóñez Switzerland fib Stef Maas Belgium FEBE Alejandro Lopez-Vidal Spain ANDECE Alessandra Ronchetti Italy ASSOBETON Emily Lorenz United States PCI Jyri Nieminen Finland Sweco Finland Antonio Aguado de Cea Spain Universitat Politecnica de Catalunya Marco Menegotto Italy Private Stefano Pampanin New Zealand University of Canterbury Bin Zhao China Tongji University Koji Sakai Japan Japan Sustainability Institute Tomas Plauska Netherlands Consolis Tomas Plauska Netherlands Consolis Paulo Do Lago Helene Brazil PhD Engenharia e Consultoria Petr Hajek Czech Republic Czech Technical University in Prague Albert de la Fuente Antequera Spain Universidad Polytecnica de Catalunya Jaime Gálvez Ruiz Spain Universidad Politecnica de Madrid Dean A. Frank United States PCI Precast/Prestressed Concrete Inst. Antonello Gasperi Italy Consulting
TG6.4 - Precast concrete towers for wind power generators
Wind energy production is a growing industry. The energy produced is renewable and environmentally cleaner than most production means.
Supports for the wind energy generators may be built with precast concrete elements, which can be a competitive solution compared to other structural systems.
The evolution of technology for wind energy production shows a clear need for larger wind turbines and, consequently, taller towers. Experience also shows that precast solutions are even more competitive with higher towers.
Offshore wind farms have some advantages over onshore wind farms, which explain recent investments in the area. In this case, the durability of concrete in the marine environment, compared to steel gives greater advantage to precast concrete solutions.
TG6.4 will produce a state-of-the-art report analysing and discussing the main issues related to conception, design, detailing, construction and environmental aspects of precast structural solutions.
First name Last name Country Affiliation - - - - F.J. Brughuis Netherlands MECAL BV Paulo Batista United Kingdom Abbey Pynford Alan Tricklebank United Kingdom Consulting Juan Carlos Lancha Fernandez Spain PACADAR SA Carlos Ríos Frutos Spain CALTER Ingenieria Ramon Alvarez Cabal Spain INTEMAC Jürgen Grünberg Germany University Hannover Roger Becker United States PCI Precast/Prestressed Concrete Inst. Ibrahim Abd el Malik Shehata Brazil COPPE/UFRJ George Jones Ireland CDC Ltd Carlos Chastre Rodrigues Portugal Universidade Nova de Lisboa D.C. van Keulen Netherlands Ingenieursstudio DCK David Fernández-Ordóñez Switzerland fib Stein Atle Haugerud Norway Dr. techn. Olav Olsen a.s. Albert de la Fuente Antequera Spain Universidad Polytecnica de Catalunya Juan Carlos Arroyo Portero Spain Calter Ingenieria Sl. Daniel Kuchma United States University of Illinois Romao Almeida Portugal VSL Sistemas
TG6.5 - Precast concrete bridges
Precast concrete bridges are frequently used in almost every country. Nevertheless, while it would ppear that similar practices are generally followed, the reality is that different places and cultures follow different traditions and conventions.
The group will connect the work of both PCI and fib. PCI has developed a large amount of information and publications on precast bridges.
The group will also connect the work of both Commission 1 “Concrete Structures” and Commission 6 “Prefabrication”. Both Commissions have been working on the subject of bridges, Commission 1 has an active task group on bridges and has recently published Bulletin 32 “Guidelines for the design of footbridges”. On the other hand, Commission 6 has published a state-of-the-art report regarding precast bridges, Bulletin 23 “Precast Concrete Bridges”.
First name Last name Country Affiliation - - - - Milan Kalny Czech Republic Pontex s.r.o. Prague David Fernández-Ordóñez Switzerland fib Pieter van der Zee Belgium Ergon Belgium Kenichi Kata Japan Sumitomo Mitsui Consctruction Co, Ltd. Bruno Briseghella Italy - Jong Sung SIM South Korea, Republic of Hanyang University Manyop Han Korea, Republic Of KCI (Korean Concrete Institute) Freddy Ariñez Fernandez Spain Universidad Politécnica de Madrid Mario Garcia Gonzalez Spain GRUPO PACADAR Luis Matute Rubio Spain IDEAM S.A. Mario Petrangeli Italy Mario Petrangeli & Associati Helder Figueiredo Spain IDEAM SA Stephen Salim United Kingdom Peter Brett Associates LLP Robert Wheatly United Kingdom Atkins Sung-Yong Park South Korea, Republic of KICT Yen Lei VOO Malaysia Dura Technology Sdn. Bhd Chen Baochun China Fuzhou University Sameh El-Ashri United Arab Emirates e.Construct Pankaj Garg India Atkins Lars Lundrof Nielsen Denmark COWI Ruslan Pogrbniak Russia, Federation of Slavutich William Nickas United States PCI André de Chefdebien France LB7/Lesage Group Alessandro Palermo New Zealand The University of Canterbury Gopal Srinivasan United Kingdom Arup Albert de la Fuente Antequera Spain Universidad Polytecnica de Catalunya Fernando Rebouças Stucchi Brazil ABECE/EGT Mamdouh El-Badry Canada University of Calgary Hugo Corres Peiretti Spain FHECOR Ingenieros Consultores Marcelo Waimberg Brazil EGT Engenharia Maher Tadros United States University of Nebraska-Lincoln Yin-Wen Chan Taiwan, Province Of China National Taiwan University
TG6.6 - Retrofitting of precast seismic structures
Topics to be covered within the bulletin could be:
- lessons learned and damage observation or better damage mechanisms observed in previous earthquake and associated performance of precast buildings;
- list of typical critical or less critical vulnerabilities of this class of buildings;
- simplified assessment methodology based on different levels of complexity, from quick screening (pre- or post-damage) without drawings to quick evaluation with drawings, to more detailed analysis and ultimately numerical analysis (computer based);
- overarching retrofit strategies (e.g. drift control or local ductility, thus implying a combination of global vs. local intervention);
- scenario/flowcharts of possible techniques (presented only conceptually but with practical aspects) to fulfil/achieve the targeted retrofitted performance;
- high-level (schematic) discussion of pros and cons of each retrofit solution including cost, invasiveness, downtime and other indirect but important parameters for the owner, tenants, insurer etc.
First name Last name Country Affiliation - - - - David Fernández-Ordóñez Switzerland fib Larbi Sennour United States The Consulting Engineers Gr., Inc. Georgia Kremmyda Greece NTUA Ioannis Psycharis Greece NTUA Nat. Technical University of Athens Sevket Ozden Turkey OTS INSAAT Engineering & Design Co. Iman Hajirasouliha United Kingdom The University of Sheffield Andreas Lampropoulos United Kingdom University of Brighton Tryfon Topintzis India Katerra India Pvt. Ltd Marco Savola Italy University of Bologna Marco Menegotto Italy Private Wit Derkowski Poland Cracow Technical University Barry Crisp Australia Crisp Consultants PTY Ltd Stefano Pampanin New Zealand University of Canterbury Bin Zhao China Tongji University Erkan Akpinar Turkey Kocaeli University Salyendra Ghosh United States S.K. Ghosh Associates, Inc. Spyros Tsoukantas India Katerra India Pvt. Ltd Thomas D’Arcy United States Private Minehiro Nishiyama Japan Kyoto University Ned Cleland United States Blue Ridge Design Marco di Prisco Italy Politecnico di Milano Paolo Riva Italy University of Bergamo
TG6.7 - Precast concrete in tall buildings
There has been considerable growth in the construction of tall buildings throughout the world over recent years. The variation in use of such buildings is remarkable, from the most highly specified hotels and apartments to social housing. Tall buildings use many materials to form their framework and shell, and generally mix those materials to deliver the building specified by the client. Precast concrete has been used by architects and engineers to good effect, from whole frameworks to façades, and elements mixed with structural steelwork and cast-in-place concrete. Task Group 6.7 (TG6.7) will develop a state-of-the-art bulletin that will show how precast concrete can be effectively integrated into tall buildings using modern materials and techniques, drawing on the experience and expertise that is currently available in the global concrete industry.
First name Last name Country Affiliation - - - - Iria Licia Doniak Brazil ABCIC David Fernández-Ordóñez Switzerland fib Akio Kasuga Japan Sumitomo Mitsui Construction Co.Ltd. Antonello Gasperi Italy Consulting Pieter van der Zee Belgium Ergon Belgium Jenny Burridge United Kingdom The Concrete Centre Neil Pitt United Kingdom Explore Manufacturing Kim Elliott United Kingdom Precast Consultant Tryfon Topintzis India Katerra India Pvt. Ltd Marco Savola Italy University of Bologna John Stehle United Kingdom Laing O’Rourke Micha Falger Netherlands BAM Advies & Engineering Francisco Graziano Brazil Pasqua & Graziano N. Vambersky Netherlands Corsmit Raadgevend Ingenieurs Marco Menegotto Italy Private Andrew Truby United Kingdom Truby Stevenson Ltd Wit Derkowski Poland Cracow Technical University André de Chefdebien France LB7/Lesage Group Sthaladipti Saha India Larsen & Toubro Ltd Lasse Rajala Finland Sweco Rakennetekniikka Oy George Jones Ireland CDC Ltd Ned Cleland United States Blue Ridge Design Jason Krohn United States PCI - Precast/Prestressed Concrete Institute Carlos Chastre Rodrigues Portugal Universidade Nova de Lisboa D.C. van Keulen Netherlands Ingenieursstudio DCK Simon Hughes Australia Private Stefano Pampanin New Zealand University of Canterbury Bin Zhao China Tongji University Venkatesh Seshappa United States Gate Precast Company Salyendra Ghosh United States S.K. Ghosh Associates, Inc. Válter Da Guia Lucio Portugal Universidade Nova de Lisboa Válter Da Guia Lucio Portugal Universidade Nova de Lisboa Hugo Corres Peiretti Spain FHECOR Ingenieros Consultores Spyros Tsoukantas India Katerra India Pvt. Ltd Thomas D’Arcy United States Private Andrzej Cholewicki Poland Building Research Institute (ITB) Barry Crisp Australia Crisp Consultants PTY Ltd Simon Kelly Northern Ireland Creagh Concrete Andrew Minson United Kingdom MPA - Mineral Products Association Marcelo Ferreira Brazil UFSCAR Federal University of Sao Carlos Válter Da Guia Lucio Portugal Universidade Nova de Lisboa Válter Da Guia Lucio Portugal Universidade Nova de Lisboa
TG6.8 - Terminology for precast concrete
In fib bulletins, the terminology and language used was not uniformly understood by experts from various countries throughout the world.
The objective is to create a technical report that lists the common terminology used in the prefabrication industry along with an explanation describing the terms. There may be multiple terms used with the same definition.
First name Last name Country Affiliation - - - - Gösta Lindström Sweden AB Strangbetong Alessandra Ronchetti Italy ASSOBETON N. Vambersky Netherlands Corsmit Raadgevend Ingenieurs Holger Karutz Germany CPI Concrete Plant International Jason Krohn United States PCI - Precast/Prestressed Concrete Institute Barry Crisp Australia Crisp Consultants PTY Ltd Simon Hughes Australia Private David Fernández-Ordóñez Switzerland fib Carlos Chastre Rodrigues Portugal Universidade Nova de Lisboa Antonello Gasperi Italy Consulting Dean A. Frank United States PCI Precast/Prestressed Concrete Inst. George Jones Ireland CDC Ltd Marco Menegotto Italy Private Joost Walraven Netherlands Delft University of Technology
TG6.9 - Precast parking structures
Besides the traffic congestion, one of the most prevalent problems in large urban agglomerations where cars are the dominant mode of transportation, vehicles spend most of the time parked. Particularly in the central areas both challenges are interrelated, since looking for parking spaces, causes congestion in circulation.
Precast concrete is generally used in the constructions of structures and buildings facilitating urban mobility (e.g. airports, stations, bridges, etc.). Precast concrete offers important advantages: large spans by using prestressed elements, speed of erection, low environmental impact, low maintenance costs and many more.
Despite the fact this bulletin mentions the advantages of precast concrete in parking garages several times, there is a clear need to inspire designers and architects with more examples and best practices from all over the world, considering new local needs.
This report should encourage architects and designers to use precast (prestressed) concrete for car parking structures. The report will gather examples from all over the world showing how functional, safety and aesthetics requirements can be fulfilled by using precast concrete.
The report shows the variety of precast concrete elements that can be used for this specific type of buildings, depending on the conceptual design and the aesthetic requirements.
First name Last name Country Affiliation - - - - Stefano Pampanin New Zealand University of Canterbury Simon Hughes Australia Private Ned Cleland United States Blue Ridge Design Larbi Sennour United States The Consulting Engineers Gr., Inc. Iria Licia Doniak Brazil ABCIC Wit Derkowski Poland Cracow Technical University David Fernández-Ordóñez Switzerland fib George Jones Ireland CDC Ltd Ronald Klein-Holte Netherlands VBI Ontwikkeling BV Stef Maas Belgium FEBE Lasse Rajala Finland Sweco Rakennetekniikka Oy Pieter van der Zee Belgium Ergon Belgium Dean A. Frank United States PCI Precast/Prestressed Concrete Inst.