PLASTIC FANTASTIC transparent load-bearing facade Eelko Kroon - - PowerPoint PPT Presentation

PLASTIC FANTASTIC

transparent load-bearing facade

Eelko Kroon 1303031 Reinhard Prophitius 1311689 June 29, 2010

scenario facade prototype element total building conclusions recommendations sponsors

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CONTENTS

PLASTIC FANTASTIC - transparent load-bearing facade

load-bearing: > free plan: no columns needed > linear distributed load: no beams needed > combine two functions: skin & construction > fast building time: damp free construction transparent: > optimal daylight > clear experience of the free plan use one material: > transparent plastic: PMMA no glass: > thoroughgoing investigated for years at TU Delft > more fragile

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SCENARIO - principles

PLASTIC FANTASTIC - transparent load-bearing facade

why transparent plastic? > less applications in building practice > new research area why PMMA? > high Young’s modulus in relation to other polymers > payable (SRP is not) in relation to glass: > tensile strenght much better > Young’s modulus worse > conductivity better > thermal expansion much worse

50 100 150 200 250 300 350 Young's modulus (GPa) tensile strenght (MPa) compressive strength (MPa)

mechanical properties

glass PMMA 10 20 30 40 50 60 70 80 thermal conductivity

• thermal expansion coefficient
• thermal properties

glass PMMA

Thermal conductivity (W/m.K)

Young's modulus (GPa)

SRP (extrusion & compression molding) PMMA (heat resistant)

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SCENARIO - material

PLASTIC FANTASTIC - transparent load-bearing facade

Way Beyond Ordinary

™

aquariums with polymer walls: > outstanding optical clarity > excellent UV properties > high impact resistance: 17 x greater than glass and 4 x greater than concrete > superb weatherability: won’t yellow or show signs of aging > structural: can be engineered to support weight source: > Reynolds Polymer Technology, Inc., USA

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SCENARIO - inspiration

PLASTIC FANTASTIC - transparent load-bearing facade

type 1: > massive 320 mm plate > different versions:

• glass window (with alluminium borders)
• total PMMA window
• integrated ventilation grilles

type 2: > two 160 mm leafes with cavity > sun shading inside

• > if this is possible, much applications are thinkable!

type 2 - sunshading down type 1 - window type 1 - ventilation grilles

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SCENARIO - element

PLASTIC FANTASTIC - transparent load-bearing facade

parabolic colums

(to prevent buckling)

• tubes in cavity

(to regulate temperature of inner leaf)

sliding window

(minimalistic details)

• (sunshading)

demands: > U-value below 1.0 > opening window

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FACADE - development

PLASTIC FANTASTIC - transparent load-bearing facade

temperatures: Physibel TRISCO

• > splitted outer leaf:
• > weakest point: sliding window

acoustics: dirActivity BOA > extreme high sound insulation (high density) > weakest point: sliding window

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FACADE - building physics

PLASTIC FANTASTIC - transparent load-bearing facade

• 5-5

> inner leaf may not expand (realized by heating the cavity) > outer leaf can expand vertical and horizontal (see corner detail)

scale 1:5

• sliding connection
• corner solution (horizontal)
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FACADE - thermal expansion

PLASTIC FANTASTIC - transparent load-bearing facade

factor = 20

forces: TNO DIANA

• too much (7.5 mm) [due to low E]

> all stresses below allowed material properties > a 10 storeys high building can only be

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FACADE - structural mechanics

PLASTIC FANTASTIC - transparent load-bearing facade

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FACADE - overview

PLASTIC FANTASTIC - transparent load-bearing facade

scale 1:20 prototype

• t

prototype prototype vertical section front view horizontal section

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FACADE - details

PLASTIC FANTASTIC - transparent load-bearing facade