intr prof d cha pter 1: introduction to two-w ay sla b systems

7
1 Intr Cha Typ A rei surfa struct Gene plates 1 In thi beam 2 oduction TW apter 1: pes of Sla nforced con ces parallel. tural steel m eral slab syst s, two-way s . One-wa A slab sup slab panel is type, loads m (in the shor . Two wa The ratio It may be Slabs : Introdu abs crete slab is It may be su members, dire tems that ma slabs, and wa ay slab: pported on tw l is > 2 (fig. s are carried rt direction). ay slab: of length to with beams Prof D uction t a broad, flat upported by ectly by colu ay be designe affle slabs. S wo sides onl c) d by the slab width of on on all four s r Bayan Salim to Two-W t plate, usual RC beams, umns, or con ed according Slabs-on-gro ly (fig. a), or in one direc ne slab panel sides (fig. b) m Way Sla lly horizonta by masonry ntinuously by g to this cour ound are exc r if the ratio ction perpend is < 2 ), ab Syste al, with top a y or RC walls y the ground rse include f cluded. of length to dicular to the ems and bottom s, by d. flat slabs, fla o width of on e supporting 1 at ne g

Upload: others

Post on 25-Jan-2022

1 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

Cha

Typ

A reisurfastruct

Geneplates

1

In thibeam

2

oduction TW 

apter 1:

pes of Sla

nforced conces parallel. tural steel m

eral slab systs, two-way s

. One-waA slab supslab panel

is type, loads

m (in the shor

. Two waThe ratio It may be

Slabs              

: Introdu

abs

crete slab is It may be su

members, dire

tems that maslabs, and wa

ay slab: pported on twl is > 2 (fig.

s are carriedrt direction).

ay slab: of length to with beams

           Prof D

uction t

a broad, flatupported by ectly by colu

ay be designeaffle slabs. S

wo sides onlc)

d by the slab

width of on on all four s

r Bayan Salim

to Two-W

t plate, usualRC beams,

umns, or con

ed accordingSlabs-on-gro

ly (fig. a), or

in one direc

ne slab panel sides (fig. b)

Way Sla

lly horizontaby masonry

ntinuously by

g to this couround are exc

r if the ratio

ction perpend

is < 2 ),

ab Syste

al, with top ay or RC wallsy the ground

rse include fcluded.

of length to

dicular to the

ems

and bottom s, by d.

flat slabs, fla

o width of on

e supporting

at

ne

g

Page 2: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

- -

-

3D f

oduction TW 

Or beamleFlat plateFlat slab, due to sheWaffle (gin a rectil

figures of t

Slabs              

ess: , (fig. d), spa(fig. e), inco

ear and negagrid) slab, (fiinear pattern

two-way s

           Prof D

ans are not laorporates droative bendingig. f), a two wn to reduce th

slabs:

r Bayan Salim

arge and loaop panels ang around theway joist (ribhe dead load

ads not heavynd column cae columns, anbbed) slab ind of a solid-s

y. apitals to rednd n which voidslab construc

duce stresses

ds are formection.

s

ed

Page 3: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

Beha

Fig.(awith

It is s

The a

Fig.(b

The omom

The m

The m

oduction TW 

avior of T

a); two centuniform load

seen that the

actual behav

b); grid mod

outer strips sments are less

max moment

moments var

Slabs              

TW slabs

ter strips of ad q (kN/m2).

larger share

vior is more c

del of the sla

s2 and l2 are ns due to the s

ts occur at th

ry across sho

           Prof D

a rectangular. Their defle

e of the load

complex;

ab.

not only benshare of torsi

he sharpest c

ort and long

r Bayan Salim

r slab with shections at the

is carried in

nt but also twional momen

curvature. M

directions, a

hort span la

e intersection

n the short di

wisted. It ments.

M along s1 > M

as shown bel

and long span point are th

irection.

eans that ben

M along s2

low for a SS

an lb, loadedhe same:

nding

S slab;

d

Page 4: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

Specbeamdiago

Speci

oduction TW 

ial reinforcem-supported tonal, and at t

ial As = max

Slabs              

ement againtwo-way slabthe top ┴ dia

x positive As

           Prof D

nst twisting b system; whgonal, as fol

in the panel

r Bayan Salim

moments ishere they tenllows;

l.

s required atnd to crack t

t exterior corthe slab at th

rners of a he bottom //

Page 5: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Introduction TW Slabs                         Prof Dr Bayan Salimm 

Page 6: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

Flat

Flat

oduction TW 

Slab floor

Slab floor

Slabs              

r system

r system (w

           Prof D

with colum

r Bayan Salim

mn capital

ls)

Page 7: Intr Prof D Cha pter 1: Introduction to Two-W ay Sla b Systems

1 Intr

oduction TW Slabs                         Prof Dr Bayan Salimm