Building Construction 1 7 Rc Floors
Transcript of Building Construction 1 7 Rc Floors
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Floor structures Buildin constructure 2
REINFORCED CONCRETREINFORCED CONCRETFLOOR STRUCTUREFLOOR STRUCTURE
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Floor structures Buildin constructure 2
Structure of RC floors● joist structures
● slab structures
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Floor structures Buildin constructure 2
Classification of RC floor structures
● monolithic RC floor structures
- flat slab construction- joist construction
●
precast RC floor structures- prefab RC joist structure
- prefab RC panel floor structure
- prefab RC mushroom floor structure
● composite RC floor structure
- joist construction formed with hollow brick or concrete units
- composite RC slabs
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Floor structures Buildin constructure 2
Formwork
Permanent formwork
(„lost formwork“)
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Floor structures Buildin constructure 2
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● Monolithic RC flat slab floor structures
● one-way spanning slabs
- simply supported slab:
max. recommended span: 3 m- slabs with fixed or continuous supports:
max. recommended span: 4,5 – 6 m
t = 1/25 . L (simple support)
t = 1/30. L (fixed support)
t min = 50 mm (l < 1 m)
t min = 60 mm (l < 1,5 m)
t min = 70 mm (l >1,5 m)
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● two-way spanning slab
(ratio l 1 / l 2 = 1/1,5 )
- simply supported slabs:
max. recommended span: 4,5 x 4,5 up to 5,5 m
t = 1/75 . (l x + l y )
t = 1/105 . (l x + l y )
- slab with fixed supports:
- max. recommended span: 6 x 6 m ( up to 9 x 9 m )
l ll t d l b fl t t l d l b t
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● locally supported slab floor structures – column and slab systems
- flat slabs with flat ceilings - flat slabs with mushroom ceilin
t = min. 160 mm, l = max. 7 m
q = max. 5 kN/m2
t > 1/35 l, t > 100 mmq > 10 kN/m2
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● one way joist and rib floor structures (visible joists x flat soffit)
- monolithic RC joist floor structure
- monolithic RC rib floor structure
l = 6 – 7 m a = 1,2 – 3,0 m
h = (1/17 – 1/10) l simply supported
h = (1/20 – 1/15) l fixt, contiuous
h = (1/12 – 1/10) l girders
b = (1/2 – 1/3) h
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monolithic RC floor structures with lost formwork“ from boxes
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- monolithic RC floor structures with „lost formwork from boxes
monolithic RC rib floor structures with lost formwork“ from ceramic fillers
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- monolithic RC rib floor structures with „lost formwork from ceramic fillers
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Self-acting (lost) formwork
ooden chips + cement mortar
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- waffle and grid floor structures with visible joists
- waffle and grid floor structures with „lost forms“
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
ass-concre e oor s ruc ure
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Floor structures Buildin constructure 2
● glass concrete floor structure
● glass concrete vault andcupola structure
l = max 1,5 m
150 x 150mm - 250 x 250m
expansion gap
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
Precast RC beam floors
● precast RC beam floors
- the floor consists of a number
of beams placed side by side
● precast RC rib and filler floors
● Precast RC floors from panels
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Floor structures Buildin constructure 2
Precast RC floors from panels
●
interactionof floor panels
● installation gaps
● solid panels
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Floor structures Buildin constructure 2
solid panels
● hollow panels
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Floor structures Buildin constructure 2
p
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Floor structures Buildin constructure 2
● precast ceramic-concrete
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Floor structures Buildin constructure 2
p
floor panels
● precast ceramic-concrete„planks“
● prestressed hollow panels
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Floor structures Buildin constructure 2
● prestressed rib panels
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Floor structures Buildin constructure 2
Precast girders of prefab column systems
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
COMPOSITECOMPOSITE
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Floor structures Buildin constructure 2
COMPOSITECOMPOSITE
RC FLOORRC FLOOR
STRUCTURESSTRUCTURES
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Floor structures Buildin constructure 2
● Composite RC floors from ribs and fillers
● interconnection – interaction of precast and monolithic parts
● Composite RC slab floors
Composite RC floors from ribs and fillers
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Floor structures Buildin constructure 2
Composite RC floors with interconnected ribs and fillers
(type filigran“)
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Floor structures Buildin constructure 2
(type „filigran )
h = 190 – 300 mm
t = 30 – 60 mm
Composite RC floors with ceramic fillers
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Floor structures Buildin constructure 2
t
Composite RC floors from concrete hollow fillers
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Floor structures Buildin constructure 2
Structural modifications for heavier loading
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Floor structures Buildin constructure 2
Composite RC floors from prestressed RC ribs type HATTRICK and
HURDIS fillers
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Floor structures Buildin constructure 2
HURDIS fillers
Composite RC slabs
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Floor structures Buildin constructure 2
50 – 100 m
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
l =7,2 – 8,4 m
t = 150 – 250 mm
u = min 75 mm
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
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500
Installation fillers from recycled plastic waste
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Floor structures Buildin constructure 2
500
výztužné žebro
instalační komínek
polodrážka
zeslabená stěna
instalační komínek
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Floor structures Buildin constructure 2
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Floor structures Buildin constructure 2
● prefab RC mushroom floor structure