BẢNG TÍNH GÓI CẦU CAU DUONG

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1 CROSS SECTION

Left span Right span

Distance from end of beam to center of bearing a = 0.35 0.35 m

2.1 Dead load:

Total dead load from superstructure (From abutment calculation sheet)

Left span Right span

Dead load from superstructure and auxiliary structures (DC)

Dead load from pavement and utilities (DW)

Dead load per bearing

Units

Sum (DW) Sum (DC)

Bearing reaction Items

500

12000

CROSS SECTION

2.2 Live load (LL):

2.2.1 Put the vehicle in longitudinal of the bridge:

Reaction of left span (25% dynamic load allowance) 360.03 KN

Reaction of right span (25% dynamic load allowance) 0.00 KN

2.2.2 Put the vehicle in transverse of bridge:

2.2.2.1 Case 1:

Put the vehicle in 3 lanes, centrical, axle weight of unity = 1 KN, lane load of unity = 1 KN/m

2.2.2.2 Case 2:

Put the vehicle in 3 lanes, ecccentric, axle weight of unity = 1 KN, lane load of unity = 1 KN/m

Reaction of left span

Reaction of right span

Tandem

Truck

Tandem

Truck

Truck

q

q

2.2.2.3 Results of bearing reaction by axle weight of unity and lane load of unity:

(Analysis by MIDAS/Civil)

axle weight

of unity P=1KN

Lane load of unity = 1KN/m

axle weight

of unity P=1KN

Lane load of unity = 1KN/m

2.2.2.4 The value of bearing reaction by lives load:

Weight of axles in transverse of bridge on left span: 180.01 KN

Weight of axles in transverse of bridge on right span: 0.00 KN

Results of bearing reaction by lives load and lane load:

2.3 Deflection and Rotation Longitudinal of bearing

Deflection due to Dead load and live load (from girder calculation sheet)

Rotation Longitudinal

3 LOAD COMBINATION:

Strength I Strength II Strength III Service Extreme

4 CHOOSE BEARING

N Rotation Compression allowable rotation allowable disp

Dimension of bearing choose: ===> 200x350x63 mm

No

Case 2

Case 1

Multiple presence factors "m"

0.85

Bearing

Case 1 Bearing

reaction

0.85

Bearing reaction (KN)

Load

Combination

Case 2

Force and rotation at bearing Choose Combination