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|
|Sevket||Ozden||Turkey||OTS INSAAT Engineering & Design Co.|
|Ronald||Klein-Holte||Netherlands||VBI Ontwikkeling BV|
|Wit||Derkowski||Poland||Cracow Technical University|
|André||de Chefdebien||France||Rector Lesage|
|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|
|Simon||Hughes||Australia||Precast Concepts Pty. Ltd|
|Stefano||Pampanin||Italy||Sapienza University of Rome|
|Venkatesh||Seshappa||United States||Gate Precast Company|
|Albert||De la Fuente||Spain||Universitat Politècnica de Catalunya|
|Dean A.||Frank||United States||Dean Frank Associates, LLC|
|Mounir||El Debs||Brazil||Univ. Sao Paulo at Sao Carlos|
|Subbaiya||Kanappan||India||Larsen & Toubro Ltd|
|Marcelo||Ferreira||Brazil||UFSCAR Federal University of Sao Carlos/ABCIC|
|Válter||Da Guia Lucio||Portugal||Universidade Nova de Lisboa|
|Peter||Meuwissen||Germany||Progress Group GmbH|
|Juan Carlos||Lancha Fernandez||Spain||PACADAR SA|
- 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
- TG6.8 - Terminology for precast concrete
- TG6.9 - Precast parking structures
- TG6.11 - Vison of precast concrete on social challenges
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 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 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 Precast Concepts Pty. Ltd Olli Korander Finland - David Fernández-Ordóñez Switzerland fib Andrzej Cholewicki Poland Building Research Institute (ITB) Sergey Bronin Russian Federation PATRIOT-Engineering Marcelo Ferreira Brazil UFSCAR Federal University of Sao Carlos/ABCIC Wayne Kassian Canada Kassian Dyck Associates
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 Doniak Brazil ABCIC David Fernández-Ordóñez Switzerland fib Bruno Della Bella Italy Gruppo Centro Nord Stef Maas Belgium FEBE Jaime Fernández Gomez Spain Universidad Politecnica de Madrid Juan Carlos Lopez-Agüi Spain IECA Alejandro Lopez-Vidal Spain ANDECE Holger Karutz Germany ad-media GmbH Dean A. Frank United States Dean Frank Associates, LLC Alessandra Ronchetti Italy ASSOBETON Wayne Kassian Canada Kassian Dyck Associates Munir Basmaji United Arab Emirates - Peter Meuwissen Germany Progress Group GmbH Navendu Rai United Arab Emirates -
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 was the study of the most recent work developed on sustainability and in particular Life Cycle Assessment regarding structures where precast concrete elements are used. Then, the TG worked on the drafting of recommendations regarding the study and assessment of precast concrete elements and structures, with respect to sustainability. This covered all aspects regarding this kind of structures, from planning, design, execution, use, maintenance, and remedial activities, up to dismantling, reuse and recycling. This conclusion of this work of the TG was the publication of the joint PCI-fib Bulletin 88 Sustainability of precast structures.
The final objective of the TG involves the proposal of a multi-criteria decision-making model that can be used for the assessment of the sustainability of structures with precast elements.
First name Last name Country Affiliation Iria Doniak Brazil ABCIC David Fernández-Ordóñez Switzerland fib Stef Maas Belgium FEBE Alejandro Lopez-Vidal Spain ANDECE Emily Lorenz United States PCI Stefano Pampanin Italy Sapienza University of Rome Koji Sakai Japan Japan Sustainability Institute Petr Hajek Czech Republic Czech Technical University in Prague Albert De la Fuente Spain Universitat Politècnica de Catalunya Jaime Gálvez Ruiz Spain Universidad Politecnica de Madrid Dean A. Frank United States Dean Frank Associates, LLC Antonello Gasperi Italy Private Tomas Plauska Netherlands Consolis Alessandra Ronchetti Italy ASSOBETON Munir Basmaji United Arab Emirates - Irene Josa United Kingdom University College London (UCL)
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 Juan Carlos Lancha Fernandez Spain PACADAR SA Jürgen Grünberg Germany University Hannover David Fernández-Ordóñez Switzerland fib Stein Atle Haugerud Norway Dr. techn. Olav Olsen a.s. Albert De la Fuente Spain Universitat Politècnica de Catalunya Iria Doniak Brazil ABCIC Fernando Martinez Perez-Beato Spain DYWIDAG Sistemas Constructivos Tomas Plauska Netherlands Consolis Celia Gómez del Pulgar Spain Calter Ramaseshu Kittur Srinivasan India Padacar José Ángel Rodrigo Ramiro United Kingdom RPS Group Eduardo Salete Casino Spain Universidad Nacional de Educacion a Distancia Borja San Vicente Larrechi Spain Siemens Gamesa
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. Jong Sung SIM Korea, Republic of Hanyang University 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 Robert Wheatly United Kingdom Atkins Sung-Yong Park 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 Lundorf Nielsen Denmark COWI Ruslan Pogrbniak Russian Federation Slavutich William Nickas United States PCI André de Chefdebien France Rector Lesage Alessandro Palermo New Zealand The University of Canterbury Albert De la Fuente Spain Universitat Politècnica de Catalunya Fernando Stucchi Brazil ABECE/EGT Hugo Corres Peiretti Spain FHECOR Ingenieros Consultores Marcelo Waimberg Brazil EGT Engenharia/Abcic Maher Tadros United States University of Nebraska-Lincoln Byungsuk Kim Korea, Republic of Hanyang University Jasson Tan Malaysia Dura Technology Steven Nolan United States Florida Department of Transportation Ong Chong Yong Malaysia EXPERIVA SOLUTIONS José Rui Pinto Portugal Mota-Engil Pré-fabricados Venkataramana Heggade India Indian National Academy of Engineers Musa Alawneh United Arab Emirates e.construct LLC Mamdouh El-Badry Canada University of Calgary Stephen Salim United Kingdom Peter Brett Associates LLP Gopal Srinivasan United Kingdom Arup Yin-Wen Chan Taiwan, Province of China National Taiwan University Richard Brice United States Washington DOT Bruno Briseghella China Fuzhou University Gilberto Dreas Italy Deal Milad Hafezolghorani Esfahani Malaysia Dura Technology Richard Miller United States University of Cincinnati Somnath Mukherjee Malaysia HSS Integrated Ólafur Haraldsson Iceland Icelandic Road and Coastal Administration My Han Korea, Republic of Asian Concrete Federation
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 Savoia Italy University of Bologna Marco Menegotto Italy Private Wit Derkowski Poland Cracow Technical University Barry Crisp Australia Crisp Consultants PTY Ltd Stefano Pampanin Italy Sapienza University of Rome Bin Zhao China Tongji University Erkan Akpinar Turkey Kocaeli University Salyendra Ghosh United States S.K. Ghosh Associates, Inc. Thomas D’Arcy United States Private Minehiro Nishiyama Japan Kyoto University Ned Cleland United States Blue Ridge Design Paolo Riva Italy University of Bergamo Marco di Prisco Italy Politecnico di Milano Gennaro Magliulo Italy University of Naples “Federico II” Roberto Nascimbene Italy IUSS Birol Doyranli Turkey Alacalı İnşaat
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 N. Vambersky Netherlands Corsmit Raadgevend Ingenieurs Holger Karutz Germany ad-media GmbH Jason Krohn United States PCI - Precast/Prestressed Concrete Institute Barry Crisp Australia Crisp Consultants PTY Ltd Simon Hughes Australia Precast Concepts Pty. Ltd David Fernández-Ordóñez Switzerland fib Carlos Chastre Rodrigues Portugal Universidade Nova de Lisboa Antonello Gasperi Italy Private Dean A. Frank United States Dean Frank Associates, LLC George Jones Ireland CDC Ltd Marco Menegotto Italy Private Joost Walraven Netherlands Delft University of Technology Alessandra Ronchetti Italy ASSOBETON
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 Italy Sapienza University of Rome Simon Hughes Australia Precast Concepts Pty. Ltd Ned Cleland United States Blue Ridge Design Larbi Sennour United States The Consulting Engineers Gr., Inc. Iria 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 Dean Frank Associates, LLC Cem Özer Turkey Peikko Turkey & Statica Consulting Wayne Kassian Canada Kassian Dyck Associates Nick Zygouris Greece Lithos Consulting Engineers Felipe García Spain Artepref Seyit İsmail Ulusoy Turkey CEG TR