The Fabric Formwork Book by West, Mark -- Read -- Imperial Library of Trantor

Index

Cover Title Copyright Dedication Contents ACKNOWLEDGEMENTS THE AUTHOR CONTRIBUTING AUTHORS PHOTO AND ILLUSTRATION CREDITS INTRODUCTION How to use this book PART 1 ABOUT FLEXIBLE FORMWORKS

CHAPTER 1 ON FLEXIBILITY

Control New language of form

CHAPTER 2 THE HISTORY OF FABRIC FORMWORK

The inventions of the fabric-formed floor The wider potential of fabric formwork The Ctesiphon system and its legacy Shell structures and the cost of formwork Architectural expression Marine and geotechnical applications of fabric formworks Contemporary fabric-formed architecture Conclusions

CHAPTER 3 STRUCTURAL INTELLIGENCE IN FLEXIBLE MATERIALS

Funicular forms Flow of forces in solids Following curved force flows in fabric-formed structures Pressurized membranes – a co-incidence of skins Box: Materials Savings in Flexible Fabric Moulds

PART 2 CONSTRUCTION

INTRODUCTION How the content is organized Flat-sheet moulds Models Subtly different skills CHAPTER 4 TEXTILES

The basics General considerations Material behavior (mechanical properties) Textile structure

Woven textiles Deformation "on the bias" Knit textiles Non-wovens Plastic films Coated and uncoated textiles

Preferred formwork fabric types (woven polyethylene (PE) and polypropylene (PP) fabrics)

On the robustness of flexible moulds Polyethylene (PE) vs. polypropylene (PP)

Coated vs. uncoated PP and PE textiles

Uncoated (permeable) PP and PE fabrics – filtering fabric mould-walls Coated PE or PP textiles Differences in handling coated or uncoated fabrics Finally

Fabric handling Slack-sheet moulds

Creases Thermo-forming Push-buckles

Energized (tensioned) formwork sheets

Stress and stress distribution Pre-tensioning Pull-buckles Pull-buckles and pre-tensioning from impactos

Sewing

Sewing PP or PE fabrics Sewing stretch-knit fabrics Cutting, marking, and drawing on fabrics Handling fabric at joints and connections

CHAPTER 5 CONCRETE

Concrete's constituent parts – mix designs

General considerations Admixtures Water-cement ratio Concrete shrinkage Concrete slump and plasticity Self-compacting concrete (SCC) Vibration/compaction Fiber reinforced concrete (FRC) Ultra high performance concrete (UHPC) Special considerations when placing concrete in flexible moulds Aggregate size and shape Sequential lifts Pour rate

Special considerations with permeable fabric moulds

Finally

CHAPTER 6 CONNECTIONS

General considerations

Stress distribution

Fabric-to-fabric connections

Fabric-to-fabric "jointless" connections Fabric-to-fabric heat-welding Fabric-to-fabric sewing Fabric-to-fabric spline connections Fabric-to-fabric lacing and laced splines Rolled-and-tied closures Fabric-to-fabric plastic "zip-ties" Fabric-to-fabric pinning Fabric-to-fabric clamping

Fabric-to-frame connections

Fabric-to-frame clamp or pressure plates Fabric-to-frame stapling Fabric-to-frame clamping Fabric-to-frame screwing/pinning

Other connections

Free pull-points Impactos Wrapped ball Pre-stress with a threaded rod Stencil frames Form-ties Voids and openings (block-outs) "Jointless" edge connections Binding ties Sequential casts Other sequential pours

Edge-frame connections against curved fabric sheets

Pressed edges Foam rubber edge-frame Cut fabric edges Matched jaws

Scaffolding strategies

Strong-backs Spaced tables "Loose" supports

Reinforcing

Rebar connections Special considerations: rebar tie-wire

CHAPTER 7 TIPS & TRICKS

Water tests Welding burns Drawing on plastic fabrics Captured fabric Undercut or "keyed" rigidified fabric moulds Cutting, and finishing plastic rope Cutting plastic fabrics Heat-setting thermoplastic sheets Air bubbles (bug holes) Fitting rigid frames to fabric-formed concrete surfaces Rope tricks for mechanical advantage in pre-tensioning Complex surface geometry made simple On shaping impactos A note on tape Flexible mould edges External vibration A note on filling permeable moulds On filling coated-fabric moulds External manipulations of a pressurized mould Fragility of recently set concrete in flexible moulds On the robustness of flexible moulds: repair during casting

CHAPTER 8 CAST-IN-PLACE COLUMN MOULDS

Box: Pressure and Fabric-Tension in a Column Mould Commercially available column moulds Custom-made column moulds

Multiple strong-back moulds Asymmetry in tension membrane moulds Bulge-wall columns Liner + jacket methods Stretch-knit fabrics in column moulds Vertical pre-tensioning Column capitals A note on column reinforcing

CHAPTER 9 CAST-IN-PLACE WALL MOULDS

"Quilt-point" method Frame-restraint method Zero-waste wall formwork Bulge-wall method

CHAPTER 10 OPEN TROUGH MOULDS

Foundation formworks

"Fast-Foot" Strip footings and step footings

Variable-section open trough moulds

Variable-section pre-cast columns Other variable-section moulds Elastica curves Open trough moulds for tilt-up walls and facades Open trough moulds for variable-section beams Longitudinal pre-tensioning Variable-section open trough moulds – keel method

CHAPTER 11 NON-PRESSURIZED MOULDS

Open pan fabric formworks

Drumhead open pan formworks Direct casts and inverted casts

Box: Vibrating Concrete in Permeable, Open Pan Moulds

Slack-sheet open pan moulds Wrinkled sheets Spray-foam-backed moulds Rigidified fabric moulds

Hanging sheet moulds

Horizontal hanging sheet moulds Vertical hanging curtain moulds

Box: Funicular Vaults and Thin-Shells; Double Curvature in Shells

Inverted hanging sheet moulds and structural shells Direct-cast thin-shell vaults

CHAPTER 12 TRUSS AND BRANCHING FORMS

Naturally formed branching shapes

Stencil frames as guides for branching shapes Column-to-beam branching shapes Excess fabric at branching joints Horizontal, branching, open trough moulds Pre-tensioned branching shapes Truss moulds

Summation: Construction With Fabric Formworks

Advantages of fabric formworks Advantages of flat-sheet formworks Disadvantages of fabric formworks Disadvantages of flat-sheet formworks

CODA REFERENCES PATENTS GLOSSARY INDEX

← Prev
Back
Next →

← Prev
Back
Next →