70 kN "a" kN 50 kN “a" kN "c" m A E B C D 4 at “b" m

Use virtual work method and determine the following unknowns on the truss system shown  below. Use A = 500 mm2 and E = 200 GPa. Show complete and organized solution. Round-off your answers  to two decimal places.

GIVEN:

a. 42.0

b. 4.0

c. 9.0

QUESTIONS:

 1. Horizontal displacement of joint G due to the applied loads in mm 

2. Horizontal displacement of joint G considering that the top chord members experience 60 oC  increase in temperature in mm. Use α = 10-6/ oC 

I WANT A BETTER SOLUTION FOR THIS, PLEASE DON'T COPY THE OTHER ONE. THANK YOU!!!