Building Construction 1 7 Rc Floors

7/24/2019 Building Construction 1 7 Rc Floors

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Floor structures Buildin constructure 2

REINFORCED CONCRETREINFORCED CONCRETFLOOR STRUCTUREFLOOR STRUCTURE




Structure of RC floors● joist structures

● slab structures




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




Formwork

Permanent formwork

(„lost formwork“)





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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)



● 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



● 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







● 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



monolithic RC floor structures with lost formwork“ from boxes



- monolithic RC floor structures with „lost formwork from boxes

monolithic RC rib floor structures with lost formwork“ from ceramic fillers



- monolithic RC rib floor structures with „lost formwork from ceramic fillers



Self-acting (lost) formwork

ooden chips + cement mortar



- waffle and grid floor structures with visible joists

- waffle and grid floor structures with „lost forms“










ass-concre e oor s ruc ure




● glass concrete floor structure

● glass concrete vault andcupola structure

l = max 1,5 m

150 x 150mm - 250 x 250m

expansion gap







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




Precast RC floors from panels

●

interactionof floor panels

● installation gaps

● solid panels




solid panels

● hollow panels




p




● precast ceramic-concrete




p

floor panels

● precast ceramic-concrete„planks“

● prestressed hollow panels




● prestressed rib panels




Precast girders of prefab column systems













COMPOSITECOMPOSITE




COMPOSITECOMPOSITE

RC FLOORRC FLOOR

STRUCTURESSTRUCTURES




● 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




Composite RC floors with interconnected ribs and fillers

(type filigran“)




(type „filigran )

h = 190 – 300 mm

t = 30 – 60 mm

Composite RC floors with ceramic fillers




t

Composite RC floors from concrete hollow fillers




Structural modifications for heavier loading




Composite RC floors from prestressed RC ribs type HATTRICK and

HURDIS fillers




HURDIS fillers

Composite RC slabs




50 – 100 m







l =7,2 – 8,4 m

t = 150 – 250 mm

u = min 75 mm















500

Installation fillers from recycled plastic waste




500

výztužné žebro

instalační komínek

polodrážka

zeslabená stěna

instalační komínek







● prefab RC mushroom floor structure




Documents

Building Construction 1 7 Rc Floors