faculty of civil engineering ctu in prague department of...
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Precast ConcreteIng. Josef Fládr
Faculty of Civil Engineering
CTU in Prague
Department of Concrete and
Masonry Structures
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Advantage
Production accuracy
Free shape solutions
Quick mounting structure
Without wet solution
Better surface finish
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Disadvantage
Heavy transport and handling
Structure joint
Precision construction foundation
Extra reinforcement
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Structure joint
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Structure joint
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Structure joint
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Structure joint
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Structure joint
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Structure joint
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Structure joint
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Lifting System
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Lifting System
Thread System
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Lifting System
Wire Loops System
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Lifting System
Spherical Lifting System
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Design Lifting System
VFP
qAFadh
self-weight panel
=> influence adhesion formwork,
where:
A interface between the element and the formwork
q coefficient of friction
Coefficient of friction
Smooth with oil q = 1 kN/m2
Smooth without oil q = 2 kN/m2
Rough q = 3 kN/m2
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Design Lifting System
tahp
go
d FFn
N .cos.
.1,
p
go
d Fn
N .cos.
.2,
where:
δ Dynamic coefficient,
γgo Safety coefficient 1,35,
n number of active manipulation of elements,
cos β Angle handling element,
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Design Lifting System
Dynamic coefficient
Stationary crane 1,0 – 1,2
Floating crane 1,3 – 1,4
Lifting and transport on flat terrain 1,5 – 1,65
Lifting and transport on uneven
terrain
> 2,0
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Theoretical basis of presented results were
gained in support of the project FRVČ
915/2013 “Nástroje pro výuku navrhování
betonových a zděných konstrukcí v anglickém
jazyce”.