Question 14.79: Determine the horizontal displacement of joint B of the trus...

Determine the horizontal displacement of joint B of the truss. Each A992 steel member has a cross-sectional area of 400 mm^{2}.

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member n N L Nnl
AB 0 0 1.5 0
AC -1.25 -5 2.5 15.625
AD 1 4 2 8
BC 1 4 2 8
CD 0.75 -2 1.5 -2.25
\sum = 29.375
1 \cdot \Delta_{B_{h}} =\sum \frac{n N L}{A E} \\\Delta_{B_{h}} =\frac{29.375\left(10^{3}\right)}{400\left(10^{-6}\right)(200)\left(10^{9}\right)}=0.3672\left(10^{-3}\right) m =0.367 mm
2

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