Prestressed Concrete.
IS 1313
the process
8truchure telore
oindueion Compressive stresses in the
t is pet to its actual ue is kroon as
PRESTREssJN.
Prestressed Concrete member is member ef Concree in
a
ohich interna sBresrs are introcduced in a flanned monner
So that the stesz resuling from the
ae Counteracted fo
Suberimposed loads
a desira degree.
tConsider a nermal RC
beam Subjected to Erenal
super imposed or
lood
RC Beam Subjectedl 4o erlernal load
Due to extenal load,
doonuward oleflechion oCcurs in
RC beang
his Leads to Crack
develobment
Sf there is tong Sbon beam, exreisive cleflettion
a
accurs
Jeadingto Cracks mere icth ad Sometimey
Collapse ot the stucture
, to ver ome the Cracks, a sieel teolon is introduced in
Hhe tersile Zone qf the beom
h i s steel tendon is subjeiad to tensile fbrce byHensaning
it.
APPlying tensile force in the tendon
Ater tensioning ,the terdon is releasec
Cutling o Hendon
Nou the tensile force in the tendon is Converted te
Compresive force in fhe tendon
to Concrele
Nhis Compressive brce ts tronsterred
ahd Creates a Compres've sttesS in concrefe.
Conversi' on of tensi le Ho
Cempresive torce
, Due t this (ornpteiva SHrese in Concree, the beam
dellects in tubuord direchion.
upord deftection due to tendon.
When on external load iS
apblied on the beam,
the douonuord delechion due to the exteTnal lmd
i
Coutteracted by the upuard dellectioh causd due to
he terd.
Pinally the beam dellection is reduted within the
allouable imits
.Hence the stfucture be cornes SAFE
Downuoord def lection Coumerocted by ubusatd
delection tendon
Wires - Prestressing uire is a.
sngle unit mode o
steel
trards - uwo, hree or seven ires
to
are
woud
dorm
prestressing a
snd..
Hendon- A stretched elemert used in cencrete
member e strudture to impart prestress to the Concrete
High tensle wides bars, Cobes, strands are wed as
,
tendons.
Cable 4 Jroup o tendon orm a presttesing Cable.
IS 1313
the process
8truchure telore
oindueion Compressive stresses in the
t is pet to its actual ue is kroon as
PRESTREssJN.
Prestressed Concrete member is member ef Concree in
a
ohich interna sBresrs are introcduced in a flanned monner
So that the stesz resuling from the
ae Counteracted fo
Suberimposed loads
a desira degree.
tConsider a nermal RC
beam Subjected to Erenal
super imposed or
lood
RC Beam Subjectedl 4o erlernal load
Due to extenal load,
doonuward oleflechion oCcurs in
RC beang
his Leads to Crack
develobment
Sf there is tong Sbon beam, exreisive cleflettion
a
accurs
Jeadingto Cracks mere icth ad Sometimey
Collapse ot the stucture
, to ver ome the Cracks, a sieel teolon is introduced in
Hhe tersile Zone qf the beom
h i s steel tendon is subjeiad to tensile fbrce byHensaning
it.
APPlying tensile force in the tendon
Ater tensioning ,the terdon is releasec
Cutling o Hendon
Nou the tensile force in the tendon is Converted te
Compresive force in fhe tendon
to Concrele
Nhis Compressive brce ts tronsterred
ahd Creates a Compres've sttesS in concrefe.
Conversi' on of tensi le Ho
Cempresive torce
, Due t this (ornpteiva SHrese in Concree, the beam
dellects in tubuord direchion.
upord deftection due to tendon.
When on external load iS
apblied on the beam,
the douonuord delechion due to the exteTnal lmd
i
Coutteracted by the upuard dellectioh causd due to
he terd.
Pinally the beam dellection is reduted within the
allouable imits
.Hence the stfucture be cornes SAFE
Downuoord def lection Coumerocted by ubusatd
delection tendon
Wires - Prestressing uire is a.
sngle unit mode o
steel
trards - uwo, hree or seven ires
to
are
woud
dorm
prestressing a
snd..
Hendon- A stretched elemert used in cencrete
member e strudture to impart prestress to the Concrete
High tensle wides bars, Cobes, strands are wed as
,
tendons.
Cable 4 Jroup o tendon orm a presttesing Cable.
