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