Deflection Bridge Strain Tabs Proving Ring Dial Gauge Test Beam ° Spreader Beam Tie Rod Jack Test Bed
Deflection Bridge Strain Tabs Proving Ring Dial Gauge Test Beam ° Spreader Beam Tie Rod Jack Test Bed
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
•Timber beam
Safe working stress = 25 MPa
Cross-section dimensions:
height = 119 mm,
width = 66 mm
Proving ring number 293.
Steel beam
Safe working stress = 200 MPa
Cross-section dimensions:
external height = 149 mm,
external width = 50 mm,
wall thickness = 3.0 mm,
Proving ring number 1522.
1)Calculate safe max bending moment in the central part of the beam using Mmax = (I)(max stress)/(D/2)
2) calculate Safe applied force in the proving ring or tie rod, assuming a symmetrical setup as in the photo
with a ‘lever arm’ of 600 mm
Transcribed Image Text:Deflection Bridge
Strain Tabs
Proving
Ring
Dial Gauge
Test Beam
°
Spreader Beam
Tie Rod
Jack
Test Bed
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