Centre Pompidou Metz - Holzbau Amann

8/9/2019 Centre Pompidou Metz - Holzbau Amann

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CENTRE POMPIDOU METZ

TheTheTheThe Centre Pompidou MetzCentre Pompidou MetzCentre Pompidou MetzCentre Pompidou Metz


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ContributorContributorContributorContributor::::

Tobias DoebeleTobias DoebeleTobias DoebeleTobias Doebele

- Graduate engineer (FH) for timber constructions- working for Amann since 2004

TasksTasksTasksTasks::::

- Calculation and order acquisition

- Project management

- All projects outside of Germany


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IntroductionIntroductionIntroductionIntroduction Holzbau Amann:Holzbau Amann:Holzbau Amann:Holzbau Amann:- Established in 1932

South Western Germany, close to Swiss and French border

Founder Xaver Amann + 2 employees

Traditional carpentry

- 1955 Gerhard Amann joins the company

~ 15 employeesFocus on major projects

- 2008 one of the leading timber construction companies in Germany

~ 50 employees (graduated engineers, master technicians, masters, etc.)

Major timber construction projects in Germany and abroad


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Realized projects since 1932Realized projects since 1932Realized projects since 1932Realized projects since 1932

- 51 sports halls

- 56 industry halls

- 29 schools

- 27 community centers

- 29 constructions for sport (from natatoriums to ski jumps)

- 17 spa hotels

- 6 office buildings

- 9 restaurants

- 75 residential houses


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TheTheTheThe HermesHermesHermesHermes RoofRoofRoofRoofWorld Exhibition EXPO 2000, Hannover Germany

Architects:Architects:Architects:Architects: Herzog+Partners, Munich

Date:Date:Date:Date: 1999/2000

SpecificationsSpecificationsSpecificationsSpecifications::::40 grid-shells 20x20m

10 columns, height ~ 25m, consisting each of 4 logs, ~ 1,40m

Roof surface ~ 16.000 m

ScopeScopeScopeScope ofofofof workworkworkwork Holzbau Amann:Holzbau Amann:Holzbau Amann:Holzbau Amann:

Design and planning of the entire timber construction

Factory assembly and assembly on site of the columns

On site pre-assembly of the grid-shells

Assembly on site of the entire roof construction

at peak ~ 200 carpenters on site


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Pre-assembly of the shells in the mould

Completed shell


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Shell is installed to columns

The 4 shells installed to the columns


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ChesaChesaChesaChesa FuturaFuturaFuturaFuturaSt. Moritz, Switzerland

Architects:Architects:Architects:Architects: Foster and Partners, London


SpecificationsSpecificationsSpecificationsSpecifications::::High-standard appartment house

10 flats (from 120m to 400m)

~ 230 m Gluelam

~ 15 tons of steel

~ 2500m larch shingles


Design and planning of the entire timber construction

Factory preparation and on site assembly of the timber construction

Thermal insulation and interior fittings


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ChesaChesaChesaChesa FuturaFuturaFuturaFuturaSt. Moritz, Switzerland

architects sketches

photomontage

architects 3D model


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ChesaChesaChesaChesa FuturaFuturaFuturaFutura

St. Moritz, Switzerland

pre-assembly of the wall and floor elements

wall elements ready for transport


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assembly of the elements on site

Exterior walls, curved in 2 directions, during assembly


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Interior walls during assembly

Facade with Larch shingles


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SAP ArenaSAP ArenaSAP ArenaSAP ArenaMannheim, Germany

Architects:Architects:Architects:Architects: Hentrich Petschnigg + Partners, Duesseldorf


SpecificationsSpecificationsSpecificationsSpecifications::::

Timber truss construction in gluelam ~ 90 m span

Height of the truss ~ 8,0m

~ 1500 m Gluelam~ 225 tons of steel


Design and planning of the entire timber roof construction

Factory preparation and on site pre-assembly of the trusses

Assembly on site of the entire roof constructionat


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SAP ArenaSAP ArenaSAP ArenaSAP Arena

Mannheim, Germany

Pre-assembled trusses on site

Assembly of the roof construction


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Mannheim, Germany

Truss supports during the assembly

Assembly roof overhang


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Mannheim, Germany


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TheTheTheThe Centre Pompidou ParisCentre Pompidou ParisCentre Pompidou ParisCentre Pompidou Paris

TheTheTheThe Centre Pompidou at Paris, France:Centre Pompidou at Paris, France:Centre Pompidou at Paris, France:Centre Pompidou at Paris, France:

National Centre of Modern Arts and Culture

Architects Renzo Piano, Richard Rogers and Gianfranco Franchini

Built 1971 - 1977

Georges Jean Raymond Pompidou:Georges Jean Raymond Pompidou:Georges Jean Raymond Pompidou:Georges Jean Raymond Pompidou:

French Prime Minister 1962 - 1968 French President 1969 1974 ()

Art lover and patron

Promoter of the Project

To honour his merits, the Centre

today bears his name


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WhyWhyWhyWhy buildingbuildingbuildingbuilding anananan agencyagencyagencyagency ofofofof thethethethe Centre Pompidou?Centre Pompidou?Centre Pompidou?Centre Pompidou?

Project of Decentralization

WhyWhyWhyWhy at Metz?at Metz?at Metz?at Metz? Metz was the only city left in the end of the

competition.

Other cities, like e.G. Marseille, abandoned the

projectTheTheTheThe architecturalarchitecturalarchitecturalarchitectural competitioncompetitioncompetitioncompetition::::

in 2003 international architectural competition

Richard Rogers chose 6 competitors

Japanese architect Shigeru BanShigeru BanShigeru BanShigeru Ban won the

competition


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HowHowHowHow Holzbau AmannHolzbau AmannHolzbau AmannHolzbau Amann gotgotgotgot intointointointo thethethethe projectprojectprojectproject

Fall 2004: Email from an engineering office from London

develop its constructability and make a preliminary cost estimate

Wait a minute


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On inquiry, more informations were provided:

- Roof surface about 8500m

- Roof composed of grillage elments, grid spacing ~3.0m

- Each grillage element constructed from a threethreethreethree-layer stack of planks,

30cm wide by 8.2cm thick

- Each plank manufactured from multiple layers of LVL board (Kerto)

- Each layer of LVL glued and srewed together to form the composite plank

- Composite planks cut to fit in one direction, bend in the other direction- Three layer grillage constructed by alternately stacking the planks to form

a composite open stack

- Additional shear blocks installed between the planks

- Roof covered with a PTFE mebrane

- Roof construction not only supported by the 4 columns, also by the

concrete structure and by the steel structure (tower).


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TheTheTheThe engineersengineersengineersengineers solutionsolutionsolutionsolution

3d modell with allallallall supports Composition of the grillage

Grillage

Bending of the

planks


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And eventually some visualizations


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Evaluation ofEvaluation ofEvaluation ofEvaluation of thethethethe projectedprojectedprojectedprojected solutionsolutionsolutionsolution

Pro:Pro:Pro:Pro:

- Kerto Q is high-capacity timber product

Contra:Contra:Contra:Contra:

---- Material cost and waste material when cutting the layers for the planks- Glueing on the site risky, since depending to weather conditions

- bending of the planks in one direction

- Can only be build with moulds or with falseworks under the roof structure

during the assembly.

8500m Freeform structure = 8500m moulds or falseworks!

- General doubts on the correctness of the structural analysis

3d modell correct, connections, loads, load combinations, and results?

Verification not possible, since no calculations were ever presented by the engineer

ProposingProposingProposingProposing aaaa variantvariantvariantvariant seemedseemedseemedseemed oppurtuneoppurtuneoppurtuneoppurtune


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RoofRoofRoofRoof structurestructurestructurestructure

Holzbau Amann teamed up with Swiss wood expert and consultant Hermann Blumer.

First propostion: 3 layers of single, intersecting gluelam beams with hexagonal shapes


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UnfortunatelyUnfortunatelyUnfortunatelyUnfortunately

Shigeru Ban


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We forgot one thing

the architects inspirationa Chinese hat

A woven, multi-layer structure! No single beams!


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Second proposition: 3 double-layers of intersecting gluelam planks with rectangular shapes.


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Shigeru Ban


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VirendelVirendelVirendelVirendel SystemSystemSystemSystem


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SpecificationsSpecificationsSpecificationsSpecifications acceptedacceptedacceptedaccepted solutionsolutionsolutionsolution::::

- 3 double-layers of intersecting gluelam planks, mainly GL24 grading.

- gluelam planks are glued curved in one direction. The curvature in the

second direction and the twisting is achieved by milling the beams

on the CNC machine.

- connection plank to plank: factory glued-in LVL pins with a threaded rod

- additional shear blocks between the planks

Advantages:Advantages:Advantages:Advantages:

- economically advantageous

- less material Less dead load (significant load in this construction!)

- no glueing on site

- no moulds or false-work needed, just temporary supports for assembly on site

- geometrical shape achieved by CAD design and CNC milling, not by

bending and twisting the planks high accuracy


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Detail of pinPrestressed threaded rod with disc springs

Transmission bending moments

and lateral forces

Detail of shear block

Kerto Q block(s) screwed between the planks

Transmission of shear forces between upper and

lower plank


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The model for the structuralanalysis

40000 single bars for the

timber construction


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Specifications:

- Roof surface ~ 8000 m

- Gluelam ~ 1000 m

= 18.000 lfm

= 1600 singe beams

- LVL Pins ~ 15.000 Stck

- Kerto shear block ca. 8000 pieces

- Steel elements ~ 11 tons

General Contractor: Demathieu & Bard, FranceContractor timber construction: Holzbau Amann, Germany

Structural Engineer timber construction: SJBSJBSJBSJB, Switzerland

R fR fR fR f t tt tt tt t


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2 mock-ups have been built

First mock-up (12x12m) after completion

First mock-up during laying the

foundation stoneSecond mock-up (9x9m) on the site

R fR fR fR f t tt tt tt t


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strength testing at the laboratories of the Swiss Federal Institute of Technology at Biel

FromF oF oFrom thethethethe 3D3D3D3D modelodelodelmodel totototo thethethethe trimmedt i edt i edtrimmed plankl kl kplank


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FromFromFromFrom thethethethe 3D3D3D3D modelmodelmodelmodel totototo thethethethe trimmedtrimmedtrimmedtrimmed plankplankplankplank

Starting point: 3D model from the tender

Unfortunately not directly usable for the structural analysis not sufficiently accurate

Only the fixed points (supports) could be directly transfered,

the rest of the geometry had to be reworked



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3D model imported into the structural analysis software RSTAB

geometrical corrections were realized directly on the structural

analysis modell

~ 45000 bars

~ 30000 nodes



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3D Modell from RSTAB transformed in a dxf file

some more adaptations and revisions were necessary

architect asked for some corrections to the contours of the edges of the roof

finally on July 27th, 2007:

Shigeru Ban approved thegeometry



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3D dxf model provides the geometrie of the system lines

does not provide real curves, just discretizations

is not able do create freeform surfaces

Another software was needed!

Holzbau Amann chose the software RHINORHINORHINORHINO:

perfectly adapted to design freeform surfaces (nurbs)

well-proven already for Chesa Futura

easy to learn and handle

quite a bargain

possible to create and install plugins for additional functions



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DXF RHINOHolzbau AmannHolzbau AmannHolzbau AmannHolzbau Amann

DESIGNDESIGNDESIGNDESIGNTOPRODUCTIONPRODUCTIONPRODUCTIONPRODUCTION

icappcappcappcapp

- Surface relaxation

- blanks

- division of the planks

- Smoothing the surface



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Rhino model of the roof structure



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Each plank (blank and finished piece) is imported from Rhino into CADWORKCADWORKCADWORKCADWORK

via .sat file

In CADWORKCADWORKCADWORKCADWORK:

- designing and integrating of the connection elements

- generating production lists and shop-drawings

- adjustment to the trimming line



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3D model of each plank (blank and finished piece) is exported from Cadwork

as .sat files and imported into the PEPS software

PEPS CAM-system (Computer Aided Manufacturing)



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pppp

PEPSPEPSPEPSPEPS has ahas ahas ahas a graphicalgraphicalgraphicalgraphical useruseruseruser interfaceinterfaceinterfaceinterface

the points for cuts, drill-holes, etc. can be picked from the 3d model

PEPS calculates and generates the necessary commands for the trimming line

for the 5 axis milling of the planks plugins have been programmed

Click on edge of a plank PEPS generates commands for the trimming line

machining can be simulated in PEPS

errors can be detected before the plank is on the trimming line!



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pppp



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SomeSomeSomeSome figuresfiguresfiguresfigures onononon thethethethe trimmingtrimmingtrimmingtrimming


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GluelamGluelamGluelamGluelam ~ 1400 m blanks~ 1000 m on site

~ 18000 lfm

~ 1600 singe beams

SheduledSheduledSheduledSheduled timetimetimetime forforforfor trimmingtrimmingtrimmingtrimming ~ 10 months

SheduledSheduledSheduledSheduled beginningbeginningbeginningbeginning trimmingtrimmingtrimmingtrimming ~ April/Mai 2008

SheduledSheduledSheduledSheduled assemblyassemblyassemblyassembly onononon sitesitesitesite ~ February 2009

~ 3 months



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ee pCe e o p o eCe e o p o ep

Thank you for your attention

Centre Pompidou Metz - Holzbau Amann

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