Design structure of vented causewayFull description
Juntas de expansão
Juntas de expansãoFull description
Juntas de expansãoFull description
BookFull description
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Civil structural design of footing
Deskripsi lengkap
Miscellaneous
The calculation of temporary support for casting PSC Box Girder 45 M which has been implemented at BR 553 and BR 557 of Barang to Cuttak Section in Orissa India as part of India Railway Impr…Full description
Design of Expansion Joint for PSC continuous type superstructure ---------------------------------------------------------------LONGITUDINAL MOVEMENT AT END EXPANSION JOINT ON ABUTMENT : ---------------------------------------------------------------L = 70.000 m 6 2 Ec (M40 gr.) = 1.802 *10 t/m ( deferred value has b esh (at 28 days) = 1.90 *10 ecr (at 28 days)
=
4.00
fb
= = =
600 1.17 25
a
T
+/-
-
*10 /(t/m (t/m ) 2
t/m -5 o *10 / C o C
(assumed)
esh*L ush =
fb*ecr *L
ucr =
=
13.3
=
16.8 mm -----------------------30.1 mm +/20.5 mm ------------------------
*T*L
a
ut =
=
+ -
50.6
mm
mm
20.5 mm --------------------------------------------------------------------------------------Therefore, provide El with a movement of +/-
40 mm
with a preset for compression of 15 of 15 mm.
AT INTERMEDIATE EXPANSION JOINT OVER PIER The expansion joint gap at this location will twice the expansion gap at the ends. Therefore, provide M 80 with a preset for compression of 30 of 30 mm. with a movement of +/mm LEGEND:
L Ec (M40 GR.) ecr (at 7 days)
= = =
effective length design value of Mod Modulus of Elasticity for for M40 grade =570 value of strain due to creep at 7 days
esh (at 7 days)
=
value of strain due to residual shrinkage at 7 days
ecr (at 28 days)
=
value of strain due to creep at 28 days
esh (at 28 days) fb T ush
= = = = =
value of st strain due to residual shrinkage at 28 28 days coefficient of expansion per degree centigrade bottom fibre stress variation in tem pe perature on the basis of extrem e climate longitudinal deck movem en ent due to effect of shrinkage
ut
=
longitudinal deck mo movem en ent due to effect of te temperature
a
ucr
=
longitudinal deck movem ent due to effect of temperature
ues
=
longitudinal deck movem ent due to effect of elastic short
