Floor structures Building constructure 2 REINFORCED CONCRETE FLOOR STRUCTURES

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1 REINFORCED CONCRETE FLOOR STRUCTURES

2 Structure of RC floors joist structures Floor structures Building constructure 2 slab structures

3 Classification of RC floor structures Floor structures Building constructure 2 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

4 MONOLITHIC RC FLOOR STRUCTURES Floor structures Building constructure 2 Formwork Permanent formwork ( lost formwork )

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6 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)

7 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 ) - slab with fixed supports: - max. recommended span: 6 x 6 m ( up to 9 x 9 m ) t = 1/105. (l x + l y )

8 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 t > 1/35 l, t > 100 mm q = max. 5 kn/m 2 q > 10 kn/m 2 Floor structures Building constructure 2

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11 Monolithic RC joist and rib floor structures one way joist and rib floor structures (visible joists x flat soffit) - monolithic RC joist floor structure Floor structures Building constructure 2 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 rib floor structure

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13 - monolithic RC floor structures with lost formwork from boxes Floor structures Building constructure 2

14 - monolithic RC rib floor structures with lost formwork from ceramic fillers Floor structures Building constructure 2

15 Self-acting (lost) formwork ooden chips + cement mortar

16 two way joist and rib floor structures (waffle and grid structures) - waffle and grid floor structures with visible joists Floor structures Building constructure 2 - waffle and grid floor structures with lost forms

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20 Glass-concrete floor structure glass concrete floor structure Floor structures Building constructure 2 l = max 1,5 m 150 x 150mm x 250mm expansion gap glass concrete vault and cupola structure

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22 PRECAST RC FLOOR STRUCTURES Floor structures Building 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

23 Precast RC floors from panels Floor structures Building constructure 2 interaction of floor panels installation gaps

24 solid panels Floor structures Building constructure 2

25 hollow panels Floor structures Building constructure 2

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27 precast ceramic-concrete floor panels precast ceramic-concrete planks

28 prestressed hollow panels Floor structures Building constructure 2

29 prestressed rib panels Floor structures Building constructure 2

30 Precast girders of prefab column systems Floor structures Building constructure 2

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34 COMPOSITE RC FLOOR STRUCTURES

35 COMPOSITE RC FLOOR STRUCTURES Floor structures Building constructure 2 interconnection interaction of precast and monolithic parts Composite RC floors from ribs and fillers Composite RC slab floors

36 Composite RC floors from ribs and fillers Floor structures Building constructure 2

37 Composite RC floors with interconnected ribs and fillers (type filigran ) h = mm t = mm

38 h Composite RC floors with ceramic fillers t

39 Composite RC floors from concrete hollow fillers Floor structures Building constructure 2

40 Structural modifications for heavier loading Floor structures Building constructure 2

41 Composite RC floors from prestressed RC ribs type HATTRICK and HURDIS fillers Floor structures Building constructure 2

42 mm Floor structures Building constructure 2 Composite RC slabs

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44 l =7,2 8,4 m t = mm u = min 75 mm

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49 Composite RC slabs with plastic fillers Floor structures Building constructure 2

50 Installation fillers from recycled plastic waste Floor structures Building constructure výztužné žebro instalační komínek instalační komínek polodrážka zeslabená stěna

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53 prefab RC mushroom floor structure Floor structures Building constructure 2