Floor structures Building constructure 2 REINFORCED CONCRETE REINFORCED CONCRETE FLOOR STRUCTURES FLOOR STRUCTURES
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Floor structures Building constructure 2
REINFORCED CONCRETE REINFORCED CONCRETE FLOOR STRUCTURESFLOOR STRUCTURES
Floor structures Building constructure 2
● Structure of RC floors● joist structures
● slab structures
Floor structures Building 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
Floor structures Building constructure 2
MONOLITHIC RC FLOOR STRUCTURESMONOLITHIC RC FLOOR STRUCTURES
● Formwork
● Permanent formwork(„lost formwork“)
Floor structures Building constructure 2
Floor structures Building constructure 2
● 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)
Floor structures Building constructure 2
● two-way spanning slab(ratio l1 / l2 = 1/1,5 )- simply supported slabs:max. recommended span: 4,5 x 4,5 up to 5,5 m
t = 1/75 . (lx + ly)
t = 1/105 . (lx + ly)
- slab with fixed supports:
- max. recommended span: 6 x 6 m ( up to 9 x 9 m )
Floor structures Building constructure 2
● locally supported slab floor structures – column and slab systems- flat slabs with flat ceilings - flat slabs with mushroom ceiling
t = min. 160 mm, l = max. 7 m
q = max. 5 kN/m2
t > 1/35 l, t > 100 mm
q > 10 kN/m2
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
● Monolithic RC joist and rib floor structures● 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
Floor structures Building constructure 2
Floor structures Building constructure 2
- monolithic RC floor structures with „lost formwork“ from boxes
Floor structures Building constructure 2 JOIST AND RIB MONOLITHIC RC FLOORS
- monolithic RC rib floor structures with „lost formwork“ from ceramic fillers
Floor structures Building constructure 2
Self-acting (lost) formwork
Wooden chips + cement mortar
Floor structures Building constructure 2
● two way joist and rib floor structures (waffle and grid structures)- waffle and grid floor structures with visible joists
- waffle and grid floor structures with „lost forms“
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
● Glass-concrete floor structure● glass concrete floor structure
● glass concrete vault and cupola structure
l = max 1,5 m
150 x 150mm - 250 x 250mm
expansion gap
Floor structures Building constructure 2
Floor structures Building constructure 2
PRECAST RC FLOOR STRUCTURESPRECAST RC FLOOR STRUCTURES
● 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
Floor structures Building constructure 2
● Precast RC floors from panels
● interactionof floor panels
● installation gaps
Floor structures Building constructure 2
● solid panels
Floor structures Building constructure 2
● hollow panels
Floor structures Building constructure 2
Floor structures Building constructure 2
● precast ceramic-concretefloor panels
● precast ceramic-concrete„planks“
Floor structures Building constructure 2
● prestressed hollow panels
Floor structures Building constructure 2
● prestressed rib panels
Floor structures Building constructure 2
● Precast girders of prefab column systems
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
COMPOSITE COMPOSITE RC FLOOR RC FLOOR
STRUCTURESSTRUCTURES
Floor structures Building constructure 2
COMPOSITE RC FLOOR STRUCTURESCOMPOSITE RC FLOOR STRUCTURES
● Composite RC floors from ribs and fillers
● interconnection – interaction of precast and monolithic parts
● Composite RC slab floors
Floor structures Building constructure 2
● Composite RC floors from ribs and fillers
Floor structures Building constructure 2
● Composite RC floors with interconnected ribs and fillers (type „filigran“)
h = 190 – 300 mm
t = 30 – 60 mm
Floor structures Building constructure 2
● Composite RC floors with ceramic fillers
t
h
Floor structures Building constructure 2
● Composite RC floors from concrete hollow fillers
Floor structures Building constructure 2
● Structural modifications for heavier loading
Floor structures Building constructure 2
● Composite RC floors from prestressed RC ribs type HATTRICK and HURDIS fillers
Floor structures Building constructure 2
● Composite RC slabs
50 – 100 mm
Floor structures Building constructure 2
Floor structures Building constructure 2
l =7,2 – 8,4 m
t = 150 – 250 mm
u = min 75 mm
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
● Composite RC slabs with plastic fillers
Floor structures Building constructure 2
500
výztužné žebro
instalační komínek
polodrážka
zeslabená stěna
instalační komínek
● Installation fillers from recycled plastic waste
Floor structures Building constructure 2
Floor structures Building constructure 2
Floor structures Building constructure 2
● prefab RC mushroom floor structure
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