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tips for Easy Drawing Shear Force Diagram

SFD (Shear Force Diagram)? nahhhh now I give 5 steps and easy for drawing SFD almost all types of SFD correctly

 


kita pinjam diagram di atas dari web Mr Engineer

Langkah 1
mestilah kena calculate nilai reactions bg simply supported beam. Both of the
reactions will be equal.

Since, beam is symmetrical. i.e.,

R1 = R2 = W/2 = 1000 kg..

 

Langkah kedua

kira semua tindakan daya dengan guna equation asas pada point A, B dan C

When simply supported beam is carrying point loads. Then find shear force value in sections.
Shear force value will remain same up to point load. Value of shear force at point load changes
and remain same until any other point load come into action.

Shear force between ( A – B ) = S.F (A-B) = 1000 kg
Shear force between (B – C) = S.F (B -C) = 1000 – 2000
S.F (B – C) = – 1000 kg.

Langkah 3


Nahhhh boleh lah lukis SFD. amik pensel sekarang...



 
Nampak tak?

Langkah 4

In case of simply supported beam, bending moment will be zero at supports.
And it will be maximum where shear force is zero.

Bending moment at Point A and C = M(A) = M(C) = 0

Bending moment at point B = M(B) = R1 x Distance of R1 from point B.

Bending moment at point B = M (B) = 1000 x 2 = 2000 kg.m


Langkah 5








Tadaaaa.. dah siap SFD n BMD


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