fib COM6 prefabrication COM6 Background
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Transcript of fib COM6 prefabrication COM6 Background
Activity report & overview[Stef MAAS]
fib COM6 prefabrication
COM6 Background
Prefabrication plays an important role in structural concrete construction worldwideand is evolving continuously, to cope with current society’s habits and needs related to housing, commercial buildings and civil engineering works.
Industrialized construction brings cost efficiency, good quality and environmentally friendly solutions, able to adapt to market demands.
COM6 Goal
The basic goal of the Commission Prefabrication is to enhance the progress of precast concrete, linked to the state of art.
The general scope is to promote the understanding, not only by the specialists, ofdesign concepts, technology and use of precast concrete.
COM6 at a glance
Approximately 55 delegates Balanced composition (academics, designers, producers,
suppliers, contractors)
Representing 20 countriesAustralia (2), Belgium (3), Bosnia & Herzegovina (1), Brazil (3), Canada (1), China (1), Czech Republic (1), Finland (3), France (4), Germany (3), Greece (1), India (2), Ireland (1), Italy (4), New Zealand (1), Norway (1), Poland (2), Portugal (2), Russia (1), Spain (3), Sweden (2), Turkey (1), The Netherlands (3), United Kingdom (1), USA (6)
Organisation Chairman (tbc): Stef MAAS (BE)
Vice-chair (tbc): Wit DERKOWSKI (SP)
Secretariat Alessandra RONCHETTI (IT)
COM6 Belgian delegates
Arnold VAN ACKER
Past chairman C6Convenor TG 6.9
(Accidental loading)
Convenor TG 6.12 (Precast Handbook)
Member of several TG’s
Pieter VAN DER ZEE
Ergon Member of several TG’s
Stef MAAS
FEBE / UHasseltInterim Chairman C6
Convenor TG 6.1 (Prestressed Hollow Core)
Member of several TG’s
COM6 & PCI
Joint work since 2008. Initially two separate meetings were held
Fib C6 - plenary
Fib C6/PCI
Today 1 integrated plenary meeting
On task group level : PCI member attend fib TG’s
Fib C6 members attend PCI-committees
Common publications
COM6 Active Task Groups
TG 6.1 Prestressed hollow core floorsMaas [BE]
TG 6.2 Quality control for precast concrete Fernandez [SP] & Frank [USA]
TG 6.3 Sustainability of structures with precast elements Fernández-Ordóñez [SP]
TG 6.4 Precast concrete towers for wind energy production Lucio[PT]
COM6 Active Task Groups
TG 6.5 Precast concrete bridges Corres [SP]
TG 6.6 Retrofitting and repair of precast structures in seismic areas Tsoukantas[GR] & Pampanin [NZ]
TG 6.7 Precast concrete in tall buildings Jones [IR]
TG 6.8 Terminology in prefabrication Krohn [USA]
COM6 Active Task Groups
TG 6.10 Precast concrete buildings in seismic areas – practical aspects Tsoukantas[GR]
TG 6.11 Precast insulated sandwich panels Hughes [AUS]
TG 6.12 Planning and design handbook on precast building structures Van Acker [BE]
COM6 Topics for future Task Groups
Precast Floors
Multifunctional Precast
Precast Cladding
Precast Stadiums
Precast Car Parks
Precast Handbook for special structures
COM6 Publications (published)
11 bulletins in 12 years Bulletin 6:
2000
Bulletin 74: 2015
COM6 Bulletin 74
First edition in 1994
COM6 Bulletin 74 – special edition‘fib members only’
100+ copies: 44,95 €/copy200+ copies: 29,95 €/copy500+ copies: 19,95 €/copy
COM6 Publications (wip)
COM6 Publications (wip)
Terminology Database explaining concrete
related terms
Plugin for (precast-) related websites
Cascade system
Glossary
Possibility to suggest better definitions
Hollow Core1. Prestressed slabs varying in thickness from 4 to 12 inches having hollow interior cores to reduce weight, generally extruded.
2. is a precast slab of (prestressed) concrete typically used in the construction of floors in multi-story apartment buildings. The precast concrete slab has tubular voids extending the full length of the slab. This makes the slab much lighter than a massive solid concrete floor slab of equal thickness or strength. The slabs are typically 120 cm wide with standard thicknesses between 15 cm and 50 cm.
COM6 Publications (wip)
Website General information
about COM6
COM6 Publications (wip)
Website News
Public
Members only
Work environment for TG’s
Web meetings
COM6 Publications (wip)
Website Dissemination of
knowledge Articles from COM6
members about Precast
Publications from COM6 members about precast
…
COM6 Publications Prestressed Hollowcore Floors
….
1988 - Precast prestressed hollow core floors (Thomas Telfort),
2000 - Special design recommendations for precast prestressed hollow core floors
2013 – Main work item of TG 6.1
COM6 Publications Prestressed Hollowcore Floors
TG 6.01: approx. 20 members
Belgian is well represented, close link with EU-standardisation Stef Maas (Convenor) Convenor of CEN TC229/WG1
Arnold Van Acker (Secretary)
Pieter Van der Zee Belgian delegate in CEN TC229/WG1/TG1
Ronald Klein-Holte Convenor of CEN TC229/WG1/TG1
New recommendations Approx. 300p.
Worked examples
COM6 Publications Prestressed Hollowcore Floors
9 Chapters
1 Introduction
2 General information
3 Design of the cross-section
4 Design of hollow core floors
5 Hollowcore in seismic regions
6 Building physics
7 Environmental issues
8 Design aspects regarding finished element
9 Design considerations regarding manufacture
COM6 Publications Prestressed Hollowcore Floors
3. Design of the cross-section
3.1 General
3.2 Basic design principle
3.3 Transfer of prestressing
3.4 Stresses in the transmission zone
3.5 Flexural capacity
3.6 Shear capacity
3.7 Shear and bending interaction
3.8 Shear capacity of elements subjected to torsion
COM6 Publications Prestressed Hollowcore Floors
3. Design of the cross-section
3.9 Punching shear capacity
3.10 Protruding strands
COM6 Publications Prestressed Hollowcore Floors
4. Design of hollow core floors
4.1 General
4.2 Structural integrity
4.3 Camber design and deflection
4.4 In-plane actions
4.5 Transversal load distribution
4.6 Structural toppings and composite action
4.7 Restrained composite supports
4.8 Non-rigid supports
4.9 Cantilevered slabs
4.10 Unintended support restrainment
COM6 Publications Prestressed Hollowcore Floors
4. Design of hollow core floors
4.11 Hollow core floors subjected to horizontal actions
4.12 Dynamic actions and vibrations
4.13 Fire resistance
4.14 Connections
4.15 Light load fixings
4.16 Openings and cut-outs
COM6 Publications Prestressed Hollowcore Floors
5. Hollow core in seismic regions
5.1 Introduction
5.2 General aspects
5.3 Diaphragm action of precast hollow core floors in seismic actions
5.4 Potential failure modes
COM6 Publications Prestressed Hollowcore Floors
6. Building physics
6.1 Thermal performances
6.2 Acoustic insulation
COM6 Publications Prestressed Hollowcore Floors
7. Environmental issues
7.1 Optimal use of raw materials
7.2 Controlled manufacture
7.3 Recycling of fresh and hardened concrete
7.4 Closed production system
COM6 Publications Prestressed Hollowcore Floors
8. Design aspects regarding finished elements
8.1 Dimensional tolerances
8.2 Slippage of prestressing tendons
8.3 Imperfections
8.4 Drainage holes
8.5 Repair and retrofitting
8.6 Test methods
COM6 Publications Prestressed Hollowcore Floors
9. Design considerations regarding manufacture
9.1 During casting
9.2 Immediately after casting
9.3 Sawing of slabs
9.4 Lifting of slabs
9.5 Storage
More information?