7/28/2019 bridge bearing design

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J ob no.: 23399-00By: MCC

4/4/2013 6:32 AM

ELASTOMERIC BEARING DESIGN TO AUSTROADS (1992)

Bearing Ref: Pier bearing

DESIGN PARAMETERS

LOADS: (kN) DEFLECTIONS: DIMENSIONAL CONSTRAINTS:Minimum Load 70 Longitudinal = 7 mm Length = 500Working Load 115 Lateral = 5 mm Width = 500Buckling Load = 230 Rotation = 0.016 radians (at V min) Height = 35

Rotation = 0.025 radians (at V max )RUBBER SPECIFICATIONHardness Duro 53 Shear Modulus - G = 0.69 MPaNon-linear Index 1.00 Bulk Modulus - Eb = 2000 MPa

BEARING CONSTRUCTIONLength = 230 mm Inner Layers 6 @ 6.0 mm = 36 mmWidth = 150 mm Outer Layers 2 @ 4 mm = 8 mmHole Dia. = 0 mm Steel Plate 7 @ 5 mm = 35 mmHole Cover = 10 mmSide Cover = 10 mm Height = 79 mm *

Note: An asterisk (*) is shown if a dimensional constraint is exceeded.

SHEAR STIFFNESS = 0.541 kN/mm (at zero vertical load - see note below)

Note: The actual shear stiffness may be up to 40% less than the calculated value depending on themagnitude of the vertical load.

COMPRESSIVE STIFFNESS = 106 kN/mm

MAXIMUM STRAIN CHECKInner layers - e sc = 0.978

- e sh = 0.159- e sr = 0.800

Total strain = 1.938 ( 62 % of AUSTROADS limit ) PASSED

RATED LOAD CAPACITY

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D E F L E C T I O N / V E R T I C A L L O A

D ( y / P )

LATERAL DEFLECTION (mm)

SOUTHWELL PLOTTYPE E