A plate girder with Fe 410 steel plates is having 12mm × 1800 mm web plates and 75 mm × 550 mm flange plates. Determine the design flexural strength, if unrestrained length is 10 m.
Answers
Answer:
Fexural strength, if unrestrained length is 10 m. = 10.4 kN.m
Step-by-step explanation:
From the above question,
They have given :
A plate girder with Fe 410 steel plates is having 12mm × 1800 mm web plates and 75 mm × 550 mm flange plates. Determine the design flexural strength, if unrestrained length is 10 m.
Design Flexural Strength = 10.4 kN.m
Calculations:
Moment of Inertia of the section,
I = (75×550×550^3)/12 + (12×1800×1800^3)/3
= 5.19×10^7 mm^4
Section Modulus, Z = I/y
where y = distance of extreme fibre from the neutral axis
= (5.19×10^7)/(75/2 + 12/2)
= 8.6×10^6 mm^3
The bending strength of the material is important in determining the strength of the material when it is used in construction. The strength of the material can be increased by increasing the amount of force applied to it, increasing the shape of its cross section, and increasing the quality of its surface.
Design Flexural Strength, M = Z×fy
where fy = Yield strength of the material
= 8.6×10^6×410
= 10.4×10^6 N.mm
= 10.4 kN.m
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