TG1.2 - Concrete structures in marine environments

Well-designed, well-built concrete structures are particularly suited for the marine environment. Task Group 1.2 has so far focused on structures for oil and gas fields in hostile marine environments (fib Bulletin 50) and on concrete structures in marine environments in general (fib Bulletin 91). A special focus has been done on floating tube bridges to help the designers to consider this promising alternative (fib Bulletin 96).

Significant experience has been gained from the design and construction of offshore concrete structures of the world and concrete has shown the possibility to design durable structures also in aggressive marine environment.

The topic of durability is, nowadays, more and more important, especially considering the goals on sustainability that the community is required to reach. Durable, safe and sustainable floating concrete structures will provide an important alternative in a future with lack of space on land and new technological solutions, for example for renewable energy production, that are continuously approaching the market.

Convener
Arianna Minoretti

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• WP1.2.1
• WP1.2.2
• WP1.2.4
• WP1.2.5
• WP1.2.6

WP1.2.1 - Floating concrete structures

 

In many cases, floating structures have some clear advantages compared to fixed structures. The motivation of the work in this WP is to demonstrate these advantages, and attempt to draw conclusions as to what applications are particularly promising.

 

The objective of WP1.2.1 is to demonstrate the usefulness of concrete in a modern society where floating structures may be needed. It will identify and consider potential applications of marine floating concrete structures, and then make selections and go into more detail on how the selected applications can be made competitive.

Convener
Tor Ole Olsen

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First name	Last name	Country	Affiliation
Olsen	Tor Ole	Norway	T.O.Olsen AS
Esteban Lefler	Francisco	Spain	FCC Construction
Rogne	Harald	Norway	Olav Olsen
Gudmestad	Ove Tobias	Norway	University of Stavange
Godejord	Arnstein	United States	Arup
Østlund	Hilde Benedikte	Norway	Kværner
Paschalis	Mike	Belgium	BESIX
Rettedal	Wenche	Norway	Statoil
Wike	Tom	Norway	ØKAW
Larssen	Rolf	Norway	Aas Jacobsen
Vache	Michel	France	Doriseng
Hjorteset	Kåre	United States	BergerABAM
Zich	Milos	Czech Republic	Strasky, Husty and Partners
Jackson	Gordon	United Kingdom	Arup Energy
Thorsen	Kjetil	Norway	Snøhetta
Helland	Steinar	Norway	S Helland Konsult
Almeida	João	Portugal	Instituto Superior Técnico Lisboa
Gnägi	Adrian	Switzerland	VSL International Ltd.
Kanstad	Terje	Norway	The Norwegian Univ.of Science & Tech
Kalny	Milan	Czech Republic	Pontex Ltd.
Fernández-Ordóñez	David	Switzerland	fib
Haugerud	Stein Atle	Norway	Dr. techn. Olav Olsen a.s.
Muttoni	Aurelio	Switzerland	École polytechnique fédérale de Lausanne (EPF Lausanne)
Stucchi	Fernando	Brazil	ABECE/EGT
Peset Gonzales	Luis	Spain	Dragados SA
Hamon	Michel	France	Doris Engineering
Haynes	Scott	Hong Kong	VSL
Notenboom	Paul	Netherlands	Arcadis
Rozier	Christophe	France	Bouygues Travaux Publics
Van der Vliet	Coen	Netherlands	Arcadis
Corres	Hugo	Spain	FHECOR Ingenieros Consultores
Jenssen	Dag Nikolay	Norway

WP1.2.2 - Submerged floating tube bridges (SFTB)

 

Sometimes our infrastructures need to cross water. Immersed tunnels that sit on the seabed are widely used; more than 100 have been built.

 

Submerged floating tube bridges (SFTB) have never been built. Submerged floating tube bridges are floating bridges, submerged at a defined depth below the water surface. They may be supported between landfalls, either by tension legs or pontoons. They have a closed cross section, like the one of an ordinary tunnel, but they behave like a bridge.

 

The main scope of this working party is to provide the community with the information needed regarding the SFTB technology.

Convener
Arianna Minoretti

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First name	Last name	Country	Affiliation
Jackson	Gordon	United Kingdom	Arup Energy
Fernández-Ordóñez	David	Switzerland	fib
Haugerud	Stein Atle	Norway	Dr. techn. Olav Olsen a.s.
Minoretti	Arianna	Norway	Statens vegvesen
Isaksen	Bjørn	Norway	Norwegian Road Administration
Corres	Hugo	Spain	FHECOR Ingenieros Consultores
Olsen	Tor Ole	Norway	T.O.Olsen AS
Novello	Marco	Italy	Sapeim
Kawabata	Yuichiro	Japan

WP1.2.4 - Submerged/floating bridges in seismic areas

 

The WP would work on floating structures as solutions for seismic areas.

Convener
Luca Martinelli

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First name	Last name	Country	Affiliation
Martinelli	Luca	Italy	Politecnico di Milano - Dep. of Civil and Environmental Engineering
Fernández-Ordóñez	David	Switzerland	fib
Perotti	Federico	Italy	Politecnico di Milano
Landolfo	Raffaele	Italy	Università degli Studi di Napoli "Federico II"
Mazzolani	Federico	Italy	Università degli Studi di Napoli "Federico II"
Faggiano	Beatrice	Italy	Università degli Studi di Napoli "Federico II"
Xiang	Yiqiang	China	Zhejiang University
Shen	Yonggang	China	Zhejiang University
Geuzaine	Margaux	Belgium	NatHaz Modeling Laboratory
Del Zoppo	Marta	Italy	University of Naples Federico II
Foti	Francesco	Italy	Politecnico di Milano
Dai	Jian	Norway	OsloMet – Oslo Metropolitan University
Lovane	Giacomo	Italy	Università degli Studi di Napoli "Federico II"

WP1.2.5 - Inspections monitoring and maintenance for constructions

 

The WP will focus on how to best solve issues on inspections and continuous monitoring to answer to the maintenance problems, toward a more durable life for marine structures.

Convener
Marco Novello

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First name	Last name	Country	Affiliation
Massari	Giovanni	Italy	SAIPEM
Fernández-Ordóñez	David	Switzerland	fib
Novello	Marco	Italy	Sapeim
Fjendbo	Simon	Denmark	DTI - Danish Technological Institute
Gastaldi	Matteo	Italy	Politecnico of Milano
Samarakoon	Samindi	Norway	University of Stavanger
Corazza	Carola	Italy	HBK
Gennaro	Claudia	Italy	SISGEO
Lando	Thibaut	France	Antea Group
Maiah	Hadeel	United Arab Emirates	Gulf Survey
Blin	Régis	Switzerland	SMARTEC SA

WP1.2.6 - Innovative solutions for submerged and floating structures in marine environment

 

The challenges posed by an evolving society and the growing attention towards sustainability and optimal exploitation of natural resources require the entire Civil Engineering community to rethink the conceptual paradigms underlying the design of structures and infrastructures serving the community, including environmental structures and, more specifically, structures in contact with rivers and seas, which also serve as a driver to the Blue Economy sector.

The activities of WP 1.2.6 are placed in this line of renewal, aimed at the study of submerged and floating structures in marine environment: these structures pose a series of challenges, ranging from the choice (or even conception) of the building material, in light of the adverse and even aggressive environmental conditions, up to the accurate evaluation of the state of stress, from the perspective of the most modern probabilistic approaches to the problem.

Convener
Patrick Bamonte

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First name	Last name	Country	Affiliation
Fernández-Ordóñez	David	Switzerland	fib
Olsen	Tor Ole	Norway	T.O.Olsen AS
Shanshan	Cheng	United Kingdom	University of Plymouth
Ferrara	Liberato	Italy	Politecnico di Milano
Bamonte	Patrick	Italy	Politecnico di Milano
Jackson	Gordon	United Kingdom	Arup Energy

TG1.3 - Buildings

The use of concrete in Building Structures is widespread throughout the world and is generally well documented in the various national codes and standards. There are however a number of areas where guidance to designers is unclear or where significant interpretation is required. The aim of this task group is to review the current design and construction approaches used and to identify where additional guidance is required. Where it is felt necessary, the group will undertake the appropriate literature searches, review the available current guidance and produce new design advice and recommendations in the form of fib bulletins.

The main goals of TG1.3 main goals are to:

• identify how recent improvements in concrete knowledge and technology are, or could be, applied to building structures;
• prepare state-of-the-art reports, guidelines and recommendations on the use of concrete in the design and construction of concrete buildings.

Convener
Andrew Truby

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TG1.4 - Tunnels

Transports, mining, water management, energy network development, combined with environmental concern, are leading to a large increase of tunneling works around the World. As structural concrete plays a primary role, among other materials, for the realization of those works, it appears that many issues related to the use of concrete in tunnels ought to be addressed, in order to allow and promote the best use of structural concrete in this field of civil engineering.

The main goals of TG1.4 main goals are to:

• identify how recent improvements in concrete knowledge and technology are, or could be, applied to tunnels, and how new developments in tunnel construction can rely upon concrete technologies;
• prepare state-of-the-art reports, guidelines, recommendations for the use of concrete in tunnels design and construction.

Convener
Alberto Meda

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TG1.5 - Structural sustainability

Recently, sustainability has been discussed with regard to materials, recycling and so on, relating to the reduction of CO2 emissions. However, sustainability has another aspect, for example, the structure, design and construction, which can lead to reducing energy consumption and non-renewable resources over the course of the full life-time of a structure. Minimising energy consumption and non-renewable resources, will be discussed in the context of environmental, social and economic aspects in order to provide sustainable solutions for our society. These discussions will be key for developing sustainable structures. This philosophy is defined as “Structural Sustainability”.

The aim of this Task Group is to focus on minimising energy consumption and non-renewable resources during the life-time of structures from the structural point of view. Basically, the structures built using current specifications are durable. Therefore, structural sustainability should be defined as the difference from existing technologies to new ones in order to make structural sustainability clear. Examples of structural type, detailing, design, special construction techniques and so on for structural sustainability will be collected to publish a state-of-the-art report.

Convener
Akio Kasuga

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TG1.6 - History of concrete structures

During the long history of CEB, FIP and now fib, the main objectives of their commissions, task groups and special activity groups were and are actual topics of research, application and dissemination.

Construction history is a rapidly growing research field in the community of architects and civil engineers. The last conference on construction history took place in Paris in July 2012 and consisted of 66 sessions. Only two of them focused on concrete and concrete construction. Furthermore, none of the key lectures was related to concrete.

The task group intends to set up a process which shall result in the publication of a series of bulletins covering the global history of structural concrete, from its first developments to the present situation.

At the beginning, it is very important to organise the extremely broad field of historic research. It is suggested to start with a narrower approach, mainly with the collection of historic material. A broader approach implies the integration of concrete history within the time, including political, social, climatic, economic and ecological circumstances. This will require more time as well as the addition of historically educated experts.

Convener
Manfred Curbach

Co-Convener
Michel Moussard

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TG1.7 - Construction of concrete structures

The areas of interest have been developed from the viewpoint that the construction process has two main components: perception related aspects and process aspects. The perception related aspects comprise materials, workmanship, formwork and scaffolding, curing of concrete, concrete surface, testing and monitoring, high performance concrete, special technologies, specifications and training/education. The process related aspects comprise the construction process of concrete structures, quality management and life cycle management.

The task group addresses state-of-the-art basic principles of the construction process of concrete structures at site. Furthermore, the task group reflects on anticipated developments, which could have a significant influence on construction. The objective is to develop awareness regarding aspects which have an impact on safety, serviceability, durability and environmental issues of concrete structures to be built on site, and to provide information as how to handle the basic principles. The output will be presented as internationally harmonised reports.

Convener
Aad van der Horst

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TG1.8 - Concrete industrial floors

Concrete is often used for industrial floors that are designed to withstand static and dynamic loads as well as the degradation caused by operations and the environment.

Industrial floor must be properly designed for resisting point and distributed loads due to shelves and vehicles present on the floor. Seismic action transmitted by shelves must be considered in seismic areas.

Shrinkage phenomena play a major role since they provoke early age cracks that can be controlled by contraction joints that are likely to damage due to wheel crossing.

Another important issue is represented by the top finishing layer that had to be properly designed to resist abrasion.

Main scope of the Task Group is to briefly describe the most important issues in concrete technology for industrial floors, give relevant references to important literature, describe important design premises, give guidance to potential improvements and maintenance. Some attention will be also devoted to refurbishing of existing floors.

Convener
Giovanni A. Plizzari

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