A TIMBER BLOCK "B x B" mm SQUARE IS REINFORCED ON OPPOSITE SIDES BY A "B" mm AND 't' mm THICK STEEL PLATES. DETERMINE THE THICKNESS 't' SO THAT THE ASSEMBLY WILL SUPPORT AN AXIAL LOAD OF 1000 KN WITHOUT EXCEEDING A MAXIMUM TIMBER STRESS OF 12 MPa OR A MAXIMUM STRESS IN STEEL OF 350 MPa. MODULUS OF ELASTICITY OF STEEL AND TIMBER ARE 210 GPa & 7 GPa RESPECTIVELY.

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Chapter9: Composite Construction
Section: Chapter Questions
Problem 9.1.2P
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Minimum of 3 decimal places in all computations. 

A TIMBER BLOCK "B x B" mm SQUARE IS REINFORCED ON OPPOSITE
SIDES BY A "B" mm AND 't' mm THICK STEEL PLATES. DETERMINE THE
THICKNESS 't' SO THAT THE ASSEMBLY WILL SUPPORT AN AXIAL LOAD OF
1000 KN WITHOUT EXCEEDING A MAXIMUM TIMBER STRESS OF 12 MPa
OR A MAXIMUM STRESS IN STEEL OF 350 MPa. MODULUS OF ELASTICITY
OF STEEL AND TIMBER ARE 210 GPa & 7 GPa RESPECTIVELY.
B
B
PROB 04
P1 = 7 KN
L1 = 5m
L2 = 6m
P2 = 2 KN
L3 = 7m
P3 = 9 KN
t
W1 = 4 KN/m
W2 = 3 KN/m
B = 350 mm
Transcribed Image Text:A TIMBER BLOCK "B x B" mm SQUARE IS REINFORCED ON OPPOSITE SIDES BY A "B" mm AND 't' mm THICK STEEL PLATES. DETERMINE THE THICKNESS 't' SO THAT THE ASSEMBLY WILL SUPPORT AN AXIAL LOAD OF 1000 KN WITHOUT EXCEEDING A MAXIMUM TIMBER STRESS OF 12 MPa OR A MAXIMUM STRESS IN STEEL OF 350 MPa. MODULUS OF ELASTICITY OF STEEL AND TIMBER ARE 210 GPa & 7 GPa RESPECTIVELY. B B PROB 04 P1 = 7 KN L1 = 5m L2 = 6m P2 = 2 KN L3 = 7m P3 = 9 KN t W1 = 4 KN/m W2 = 3 KN/m B = 350 mm
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