DESIGN OF ELASTOMERIC BEARINGS FOR SOLID SLAB DECKINGS
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Transcript of DESIGN OF ELASTOMERIC BEARINGS FOR SOLID SLAB DECKINGS
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DESIGN OF ELASTOMERIC BEARINGS FOR SOLID SLAB DECKINGS
Total number of bearings in normal spans at each end = 6
( 1 ) Design Load on bearings:
Dead load
+SIDL
Dead load
+SIDL
Design Vert ical Load on bearing:
( 2 ) Design Longitudinal Translation:
Considering the effect of creep , shrinkage & temperature the value of strainhas been taken @ 5x10-4 as per Clause 916.3.4 of IRC:83 Part II
TYPE
SPAN
LENGTH
(m)
NORMAL
10.0 2.50
TYPE
NORMAL
10.0
Class 70R(wheeled)
Class 70R(wheeled)
+Class A 1Lane
SPAN
LENGTH
(m)
MAXIMUM REACTION ON ONE BEARING(t)
28.6 29.1
+Class A 1Lane
MINIMUM LOAD
10.0
MAXIMUM LOAD
16.40
TYPE
SPAN
LENGTH
(m)
TYPE
SPAN
LENGTH
(m)
NORMAL
10.0
MINIMUM REACTION ON ONE BEARING(t)
-3.219.6
DESIGN VERTICAL LOAD (t)
NORMAL
LONGITUDINAL TRANSLATION
(mm)
57.70
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( 3 ) Design value of Rotation:
( 4 ) Design Horizontal Force Per Bearing:
DESIGN HOR.
FORCE PER
BEARING (t)
TYPE
SPAN
LENGTH
(m)
NORMAL
0.0008200.00120010.0
DEAD LOADLIVE
LOAD
MAXIMUM HORIZONTAL FORCE
CLASS 70R(wheeled) + CLASS A (1
Lane)
1.6810.1
0.002020
TYPE
TOTAL VALUE OF ROTATION
(radians)
ROTATION DUE TO
NORMAL
SPAN
LENGTH
(m)
10.0
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-------------------------------------------------------------------------------------------------------------------------------------------BEARING DIMENSIONS & PROPERTIES:
G Shear modulus 1 MPa
bo Overall breadth 220 mm
lo Overall length 320 mm
hi Thickness of each layer 8 mm
n Number of layers 4-------------------------------------------------------------------------------------------------------------------------------------------RESULTS :
hc = side elastomer cover 6 mm
he = hi/2 4 mm
hs = 3/4/6 FOR h i
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SPAN 10.0.M
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