Progressive precast and demountable construction system from HPC - - PowerPoint PPT Presentation

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Progressive precast and demountable construction system from HPC - - PowerPoint PPT Presentation

Nov 10, 2023 130 likes •711 views

1707 Petr Hjek Czech Technical University in Prague Faculty of Civil Engineering, Department of Building Structures Progressive precast and demountable construction system from HPC for sustainable and resilient buildings Petr Hjek fib

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Petr Hájek

fib mini Symposium 2018 Solo

Progressive precast and demountable construction system

from HPC for sustainable and resilient buildings

Petr Hájek

Czech Technical University in Prague Faculty of Civil Engineering, Department of Building Structures

1707

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Petr Hájek

fib mini Symposium 2018 Solo

The adaptation of humans to changing conditions should be supported by higher performance quality and resilience of the whole built environment Structures and all built environment should be better prepared for new conditions – they should be sustainable and resilient

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Petr Hájek

fib mini Symposium 2018 Solo

  • New situations require new technical solutions for

construction

  • f

new and reconstruction

  • f

existing structures.

  • Concrete is material with high potential for new technical

solutions resulting in environmental impact reduction

  • High

structural safety, reliability, and higher fire resistance of concrete results in a high resistance to extreme conditions during natural disasters

  • With respect to specifics of concrete it is possible to design

robust structures with high level of resilience when faced to the natural or man-made disasters.

Role of concrete and concrete structures

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Petr Hájek

fib mini Symposium 2018 Solo

advanced technological and structural principles

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Petr Hájek

fib mini Symposium 2018 Solo

  • use of cement with reduced

environmental impacts

  • concrete constituents from waste

materials (fly ash, microsilica, etc.)

  • use of recycled concrete in new

concrete mix

50 100 150 200 1950 1970 1980 2000 2003

  • new types of composite materials with

programmed mechanical properties (SCC, FRC, HPC, UHPC etc.)

Optimisation of concrete mixture

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Petr Hájek

fib mini Symposium 2018 Solo

  • more effective structural shape
  • material savings 30 – 60%
  • lower costs / environmental impacts

from construction, transport and demolition

  • lighter structures

savings on supporting structures

Shape optimisation

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Petr Hájek

fib mini Symposium 2018 Solo

Thermal mass of concrete

  • thermal activated concrete core
  • reduction of energy consumption -

especially for cooling

  • improvement of internal

environment

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Petr Hájek

fib mini Symposium 2018 Solo

TRC – textile reinforced concrete

Advanced concrete technologies

2D and 3D textile reinforcement Self cleaning concrete surface photocatalytic titanium dioxide – self-cleaning effect Transparent concrete utilisation of optic fibres 3D printing

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Petr Hájek

fib mini Symposium 2018 Solo

utilisation of concrete light frame in low energy buildings Thermal mass Acoustic properties Horizontal rigidity Fire safety precast elements with integrated functions composite timber – concrete structures

Advanced structural principles

utilisation of concrete light frame in low energy buildings Thermal mass Acoustic properties Horizontal rigidity Fire safety

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Petr Hájek

fib mini Symposium 2018 Solo

Conversion of granery into students hostel Oslo - Norway

Renovation and conversion

Conversion of water tower into 40 students flats Jaesbergborg - Denmark

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Petr Hájek

fib mini Symposium 2018 Solo

BLDGBLOG and Archinect

Deconstruction and demountable structures

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Petr Hájek

fib mini Symposium 2018 Solo

Big Dig House Lexington, MA | 2006, SsD architects Prototype building demonstrating how infrastructural refuse can be salvaged and reused, the structural system for this house is comprised of steel and concrete discarded from Boston’s Big Dig highway

Demountable structures and reuse

  • f components
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Petr Hájek

fib mini Symposium 2018 Solo

utilization of secondary materials from other industry sectors in concrete

fly ash, silica fume, slag

utilization of recycled concrete into new concrete

recycled gravel aggregate

utilization of recycled concrete for production of other materials

embankments

Recycling and use of recycled materials in concrete technology

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Petr Hájek

fib mini Symposium 2018 Solo Source: Vonka, M.

0,2 0,4 0,6 0,8 1 1,2 1,4 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0

svázaná spotřeba energie [GJ] potřeba tepla na vytápění [GJ/rok]

TO6 B MB TO6 B MB ÚNĚTICE ÚNĚTICE RD PH RD PH RD FV RD FV PASIV PASIV RD REF RD REF BD REF BD REF BD JEČNÁ BD JEČNÁ DVOULETKA DVOULETKA BD RUBEŠOVA BD RUBEŠOVA URD URD UBD UBD TO6 B věž TO6 B věž TO6 B blok TO6 B blok T06 B PK T06 B PK

Embodied energy [GJ] Operational energy [GJ] 1970 - 1990 1900 - 1960 Standard contemporary buildings Low energy buildings Embodied value Embodied value

Importance of reuse and reconstruction

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fib mini Symposium 2018 Solo

conceptual and integrated design

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Petr Hájek

fib mini Symposium 2018 Solo

Le Corbusier, Unite d‘Habitation - Marseille

Vertical „village“ – 20 floor levels: 130 x 21 m 414 mainly mesonet flats for 1600 inhabitants Internal shopping street, recreational area with swimming pool on the roof; kinder garden on the roof

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Petr Hájek

fib mini Symposium 2018 Solo

10 km2 50 000 inhabitants, 60 000 commuting 1500 firms completion 2020 - 2025 MASDAR CITY – United Arab Emirates

Masdar Abu Dhabi

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Petr Hájek

fib mini Symposium 2018 Solo

Clean energy: incl. power generation and storage technologies, transportation technologies, cleantech/clean energy innovation, and sustainable biofuels. Environmental resources: including water and waste management, and sustainable agriculture technologies. Energy and material efficiency: including developments in advanced materials, building and power-grid efficiency, and the enabling technologies. Environmental services: including environmental protection and business services.

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Petr Hájek

fib mini Symposium 2018 Solo

Bridge across Zelivka river, Vojslavice, Czech Republic

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Petr Hájek

fib mini Symposium 2018 Solo

Aspern – Wien - Austria

Composite RC–timber load bearing frame

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Petr Hájek

fib mini Symposium 2018 Solo

concept of light RC frame for energy efficient buildings

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Petr Hájek

fib mini Symposium 2018 Solo

Load bearing structure – slender RC frame

  • subtle columns from HPC
  • optimised RC floor structure

Non-load bearing structures – based on renewable materials

  • facade envelope and roof structure:

light timber frame heavily insulated by thermal insulation

  • partitions: light timber structure

Integration of load bearing structure into building envelope

Concept of structural system for SB

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Petr Hájek

fib mini Symposium 2018 Solo

Economic Social Environmental

advantages from sustainability viewpoint

  • subtle elements – material savings
  • use of recycled materials – material savings
  • thermal mass of concrete structure – energy savings
  • high mechanical resistance and space rigidity
  • fire safety
  • good acoustic parameters of floor structure
  • flexibility – large spans up to 9 x 9 m, flat ceiling
  • fast construction - precast structural concept
  • durability, easy maintenance
  • design for dismounting + demountable joints

Concept of structural system for SB

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Petr Hájek

fib mini Symposium 2018 Solo

Light precast frame for passive house

Load-bearing structure:

  • light RC frame from HPC
  • subtle columns
  • RC floor

Envelope and internal partitions

  • timber framed structure

filled with thermal insulation

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fib mini Symposium 2018 Solo

 first floor is created by subtle

RC frame

 floor structures are from

filigree floor system

 envelope and partitions are

from timber structure

 energy passive standard

Family house in Prague Modrany

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Petr Hájek

fib mini Symposium 2018 Solo

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fib mini Symposium 2018 Solo

cross post tesioning prestressed pannels prestressed main flat girder RC lightened panells

concept of load-bearing frame

  • subtle precast elements
  • use of HPC (FC 70/85)
  • ptimised shape of columns
  • C shape
  • lightened floor panels
  • fillers from recycled materials
  • flat ceiling - prestressed flat

girders and floor panels

  • flexibility – spans up to 9 x 9 m
  • cross post tensioning
  • foundation from recycled concrete
  • fast construction
  • design for dismounting
  • Peikko corbels joints

OSEEB: Precast concrete frame for SB

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fib mini Symposium 2018 Solo

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floor panels – optimization of lightening

Wood shavings concrete Stered /Stered concrete Liapor concrete

  • Weight
  • Acoustic – airborn sound
  • Fire safety
  • Environmental impact

Light floor panels

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fib mini Symposium 2018 Solo

Prototype of pre-stressed floor panel

tubes for transverse post tensioning

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fib mini Symposium 2018 Solo

tubes for cross post tensioning

prestressed floor panels | RC floor panels

Pre-stressed floor panels

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fib mini Symposium 2018 Solo

Experimental verification of floor panels

vertical deformation [mm] force [kN] force [kN]

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fib mini Symposium 2018 Solo

prestressed floor girders

Pre-stressed floor flat girders

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fib mini Symposium 2018 Solo

Prototypes of subtle columns

prototype B prototype A FC 70/85

250 180 Peikko column corbel

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fib mini Symposium 2018 Solo

RC columns with Peikko corbels

Demountable connections

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fib mini Symposium 2018 Solo

construction

  • f experimental

OSEEB frame

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Petr Hájek

fib mini Symposium 2018 Solo

BASIC DATA

  • location: Buštěhrad, Kladno, CTU in Prague, UCEEB
  • construction: February – April 2016
  • load tests: 30.06.16 a 07.07.16

Construction of experimental frame

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fib mini Symposium 2018 Solo

Construction of experimental frame

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fib mini Symposium 2018 Solo

Construction of experimental frame

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Load testing of experimental frame

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Load testing of experimental frame

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fib mini Symposium 2018 Solo

construction: July 2018

  • Alt. 1 timber frame fasade

panels

Concept of prefabricated fasade

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fib mini Symposium 2018 Solo

Concept of prefabricated fasade

  • Alt. 2

timber frame fasade panels + TRC

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fib mini Symposium 2018 Solo

Life Cycle Assessment

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fib mini Symposium 2018 Solo

conclusions

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fib mini Symposium 2018 Solo

  • Sustainability should become a basic

concept - an “umbrella” for high quality design and operation of concrete structures through entire life cycle – considering all three pillars – social, environmental and economic.

  • Environmental assessment should be

solved using existing standard methodologies of LCA and economic pillar using standard methodologies of LCC. conclusion

1

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Petr Hájek

fib mini Symposium 2018 Solo

  • precast elements from HPC / UHPC:
  • subtle construction - reduction of concrete use
  • thin façade envelope with integrated load

bearing structure

  • demountable precast structure:
  • dissemblance and recycling
  • combination of concrete and timber

structures:

  • use of renewable materials
  • modernisation/replacement of façade envelope

in shorter periods

  • use of recycled materials:
  • precast foundation elements from recycled

concrete

conclusion conclusion

2

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fib mini Symposium 2018 Solo

Optimized concrete structures

using new types of concrete in advanced technologies can significantly contribute to

sustainability and resilience

conclusion

3

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Petr Hájek

fib mini Symposium 2018 Solo Petr Hájek

PCI fib Denver 2018

ENV SOC ECON

T7.2 (TG3.9)

Application of environmental design to concrete structures

T7.4 (TG3.11)

Sustainable civil structures

T7.3 (TG3.10)

Concrete made with recycled materials …

T7.5 (TG3.12)

EPD and equivalent Performance for concrete

LCC

Thermal mass Acoustic advantages Demountable structures

T7.1

Sustainable Concrete Struct.

– general framework

Esthetics

T7.6

Resilient structures

T7.7

Sustainable concrete mansonry

fib Commission 7 - Sustainability

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Petr Hájek

fib mini Symposium 2018 Solo

Thank you for attention

fib ICCS 2020 Prague Sept. 23– 25

3rd International Conference

  • n Concrete Sustainability

fib PhD Symposium 2018 Prague Aug. 29-31

12th fib International PhD Symposium in Civil Engineering

CESB 19 Prague July 2– 4

5th International Conference Central Europe towards Sustainable Building

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fib mini Symposium 2018 Solo

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How Doggie and Pussycat baked a cake

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fib mini Symposium 2018 Solo

Josef Čapek

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fib mini Symposium 2018 Solo

It was Doggie’s birthday and Pussycat’s name-day and thus they decided to make a cake “We will put everything we like in that cake, and then it will taste the best.”

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Petr Hájek

fib mini Symposium 2018 Solo

They put into cake all their favourite food: suggar, chocolate, nuts, milk, eggs, strong cheese, bacon, gherkins, cream, garlic, onion, pepper, cabbage, mouse, spicy sausages, etc. They mixed it together and baked it in the oven…… And they put a cake outside to cool down

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fib mini Symposium 2018 Solo

When Doggie and Pussycat came for a cake, they couldn’t find it. But instead they saw a big bad dog with a stomachache.

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fib mini Symposium 2018 Solo

  • mixing excellent components does not

guarantee excellent result

  • interaction of components and

subsystems should be considered

  • Holistic approach considering all

components their interaction and essential aspects of sustainability represents a key approach to design and construction of structures

now the lesson: