Earthquake design Tata Tiscon
-
Upload
civilsadiq -
Category
Documents
-
view
226 -
download
1
Transcript of Earthquake design Tata Tiscon
-
7/29/2019 Earthquake design Tata Tiscon
1/5
S
Str
eff
of s
Ear
mo
buil
posBut
the
con
as
col
diff
Ef
Th
cau
mo
bet
Als
for
In
dis
pro
Ho
Ear
hor
pri
ismic
ctures desi
cts of hori
tructures a
thquake ca
ion at its b
ding mov
ition.since the
drag the r
tinue to re
inertia. In
mns are
erent from
ect of De
inertia for
sing forces
ement be
een the t
o, the stiff
e. For this
act, the st
lacement
portional t
rizontal
thquake ca
izontal dir
arily desi
esign
gned for g
ontal eart
ainst horiz
ses shakin
ase. From
s with th
alls and c
of along
ain in the
the buil
lexible, t
that of the
ormatio
e experien
in column
ween their
p and bott
r the colu
reason, th
iffness for
between it
its stiffnes
nd Verti
uses shaki
ctions (X
ned to car
hilos
avity loads
quake sha
ontal earth
g of the gr
ewtons
ground, t
lumns are
ith them.
previous p
ing, since
e motion
round.
s in Str
ced by the
. During e
ends. Th
m of the
ns are (i.e.
se internal
e in a col
ends. T
s.
cal Shaki
g of the
and Y), a
y the gravi
phy
, in general
ing makin
uake force
und. So a
irst Law o
he roof h
connected
his tenden
sition is kn
the wall
of the ro
ctures
roof is tran
rthquake
larger is
olumn, the
, bigger is
forces in t
umn is th
e seismic
ng
round in
d the vert
y loads. T
, may not
it necessa
s.
building r
Motion, e
s a tende
o it,
y to
own
or
f is
ferred to t
haking, th
the relativ
larger this
he column
e columns
column s
forces attr
all three d
ical directi
e vertical
e able to s
ry to provi
sting on it
en though
cy to stay
e ground
columns
e horizont
internal fo
size/sectio
are called
tiffness ti
acted by
irections
on (Z). Al
cceleratio
fely sustai
e for adeq
will experi
the base o
in its ori
ia the colu
ndergo rel
l displace
rce in colu
n), larger i
stiffness fo
es the rel
he column
along the
l structure
during gr
the
uacy
ence
the
inal
ns,
tive
ent
ns.
this
rces.
tive
are
two
are
und
-
7/29/2019 Earthquake design Tata Tiscon
2/5
sha
of
stralo
Str
eff
the
Fl
Unlev
ine
fou
ele
the
col
tra
des
Si
dis
Im
Th
siz
(as
He
tog
con
Ot
An
un
eff
king either
afety are u
ctures tendg X and
ctures desi
cts of hori
structures
w of iner
er horizol of the m
tia forces
ndations, a
ents (floo
must be
mns are t
itional con
ign and co
Walls
ilarly, po
strous.
portance
behavior
and geom
per the pro
ce, at the
ther to en
figuration i
her unde
ther very i
oticed, is
ct. In a se
adds to or
sed in the
to be adedirectio
gned for g
ontal earth
gainst hori
tia Forc
tal shakinss of the
are transf
nd finally
r slabs, wal
designed t
he most c
truction, fl
struction, t
re relativ
rly design
of Archi
f a buildin
try, in ad
isions in I
planning
sure that t
s chosen.
irable sc
mportant a
the check
ismic moti
subtracts fr
esign of s
uate agains (both +
avity loads
quake sha
ontal eart
s to foun
of the grtructure (u
rred by t
o the soil
ls, column
safely tra
ritical ele
oor slabs a
han walls a
ly thin an
ed and co
ectural
g during ea
ition to ho
: 4326 - 1
tage itself,
he unfavor
enario
spect from
(and subse
on, short
om the acc
ructures to
t verticaland dir
, in general
ing. Hence
quake effe
ation
und, horisually situ
e floor sl
system un
, and foun
sfer these
ents in tr
nd beams r
nd columns
often m
nstructed
eatures
rthquakes
the earth
93).
architects
able featur
seismic v
quent desi
olumn an
eleration d
resist the
haking. Hctions of
, may not
it is neces
ts.
ontal inertted at the
b to the
erneath. S
dations) an
inertia for
nsferring
eceive mor
.
de of brit
einforced
epends cri
uake forc
and struct
es are avo
lnerability
n provisi
long colu
e to gravit
ravity loa
wever, hoeach) rem
e able to s
sary to ens
ia forces aloor level
walls o c
, each of
d the conn
es through
he inertia
care and
le material
oncrete c
ically on i
s are carri
ural engin
ided and a
point of vi
ns) for th
mns under
y. Since fa
s, usually
izontal shains a con
fely sustai
re adequa
re generat). These la
olumns, to
these struc
ctions bet
them. Wal
forces. Bu
ttention d
like mas
lumns ca
s overall s
d to the gr
ers must
good buil
w, which
short col
o same la
tors
ost
kingern.
the
y of
d atteral
the
tural
een
ls or
t, in
ring
nry.
be
ape,
und
ork
ding
goes
umn
teral
-
7/29/2019 Earthquake design Tata Tiscon
3/5
mo
sa
sec
In
con
at a
Gr
Re
RC
rev
and
Ca
Co
Ce
app
stre
the
ste
Thi
ce
suc
ement. Sh
e deforma
ioned faile
he case m
sidered wh
rchitect de
vity Vs E
ersal of str
frames to
rsal of str
structure
pacity D
crete is b
ent concr
ropriate pr
ngth. Steel
name - re
l is a ductil
s particular
ent concre
h that the f
ort colum
ion), so u
in shear,
ntioned a
ile designi
ign level a
rthquake
esses takes
bend, resul
sses will
ay fail, en
sign Co
ing popul
te is mad
oportions.
is used in
ar) and it
e material,
property o
te ductili
ilure of th
s have hig
less they
s depicted
ove, the e
g/ detailin
d structura
Loading in
place duri
ting in str
rove the c
angering t
cept
rly used i
of crushe
Concrete
oncrete bui
can carry
which ena
rebar, len
y. The am
member i
her stiffne
re approp
in the figur
ffect is im
the releva
l engineers
a Reinfor
g earthqua
tching and
omplete g
e life of o
building
stone chi
as high c
ldings as r
both comp
les it to un
s the com
unt and lo
by steel r
s and hen
iately desi
e below.Sho
occ
hei
win
The
as
pres
Col
mez
subj
plicit and
nt columns.
should kee
ed Concr
ke. Gravity
shortening
ravity load
cupants.
constructio
ps, sand, c
mpressive
inforceme
ressive an
dergo larg
osite (RC
ation of st
aching its
e attract l
ned we w
rt colum
rs when
ht is built t
ows or k
adjacent
short col
ence of th
mns t
zanine fl
ected to thi
ost of th
Needs to
p this in mi
te Buildin
loads (Sel
at various
based de
n since la
ment and
strength
t bars (po
tensile fo
elongatio
) a unique
eel in a me
ltimate str
rger force
ill end up
effect
alls of p
o accomm
pt as ope
olumns be
umns due
se short
hat su
ors are
s effect.
time it i
e kept in c
nd.
weight) c
locations.
ign insuffi
t five dec
water mix
ut poor te
ularly goin
ces. More
before rup
edge over
mber shoul
ngth in te
(for
with
also
rtial
date
ing.
have
to
alls.
port
also
not
heck
uses
This
ient
des.
d in
nsile
g by
ver,
ture.
lain
d be
sion
-
7/29/2019 Earthquake design Tata Tiscon
4/5
bef
fail
casMo
whi
elo
pro
(R
con
loc
suc
ste
ten
ulti
typ
cas
co
rei
Ou
ste
to t
Ho
A c
for
gro
of
we
sei
we
By
ma
to s
re concre
ure is pref
, why overeover, ste
ch enabl
gation bef
perty of r
C) a uniq
crete d
tion of ste
h that the f
l reaching
ion befo
mate stren
ofductile
where
pression.
forced stru
of various
l has signi
he final str
w to ma
ommon R
es generat
und. The fa
eam(s) ca
k links (in
mic shakin
k-beams
using the r
not be ab
ustain the
e reaches
rred over
-reinforcedel is a d
s it to
re rupture.
bar, lends
e edge ov
ctilit . T
el in a me
ilure of th
its ultim
e concret
th in co
failure is
concrete
ence the
ctures coul
building
icant ductil
cture, as di
e buildi
C framed
d at its fl
ilure of a c
ses localiz
a give RC
g of the str
stem.
utine desi
le to achie
pecific for
its ultimat
case whe
structuresctile mat
undergo l
This parti
the comp
r plain ce
e amount
ber shoul
member i
te strengt
reaches
pression.
referred o
fails first
ase, why
be harmf
aterials bei
e propertie
scussed bel
gs Ductil
tructure co
or levels a
lumn can
d damage.
frame) wi
cture. Thi
n codes (th
e a ductile
es generat
strength i
e concrete
ould be hrial,
arge
ular
site
ent
and
be
s by
in
its
his
er a
in
ver-
l!
ng used in
s which ca
ow.
e for Go
nsists of b
re t ansfer
ffect the st
Hence, it i
ll help in d
design phi
ose not co
structure.
d in seis
n compres
fails first i
rmful!
constructio
be used f
d Seismi
ams and c
ed through
ability of
clear that
issipating t
losophy is
sidering ea
pecial desi
ic activity.
sion. This
n compres
n of a RC
vorably to
Perfor
lumns. Th
its frame-
hole buildi
designing
e energy g
referred as
rthquake e
gn provisi
The India
type of d
ion. Henc
structure,
impart duc
ance?
seismic in
members t
ng while fa
eams as d
enerated d
strong-col
fects) desi
ns are req
seismic d
ctile
the
only
ility
ertia
the
ilure
ctile
ring
mn
ners
ired
sign
-
7/29/2019 Earthquake design Tata Tiscon
5/5
cod
pro
Thiins
stre
qua
Si
duc
qua
goe
in
e IS: 1
ided in th
s capacityfficient in
ngth of br
lity of c
ilarly, spe
tile are in
lity rebar
s a long w
ltimate co
920, (and
members
design coabsence o
ittle constr
nstruction
ial attenti
eed provi
ith unifor
y in ensuri
ditions.
other equ
here dam
cept in eminimum
uction mat
materials,
n should b
ed with f
propertie
ng that yo
ivalent on
ge is expe
rthquake-rrequired s
erials, like
workman
e given to
atures that
(across i
r ductile d
s) ensure
ted.
esistant derengths of
concrete,
hip and
ensure tha
give adeq
dividual re
tailing is
that adeq
ign of buthe brittle
is highly
nvironme
the eleme
uate ductil
bar and di
p to the m
ate ductili
ildings willinks. And
ensitive t
tal condit
nts meant t
ity. Selecti
ferent batc
k when t
y is
l bethe
the
ons.
o be
ng a
es),
sted