64_Problem CHAPTER 10

64_Problem CHAPTER 10 - PROBLEM 10.58 Determine the...

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PROBLEM 10.58 Determine the horizontal movement of joint D if the length of member BF is increased by 75 mm. (See the hint for Problem 10.57.) SOLUTION Apply horizontal load P at D . ( ) ( ) 0: 9 m 36 m 0 Hy MPE Σ =− = 4 y P E = 3 0 54 yB F P FF Σ = 5 12 BF FP = We remove member BF and replace it with forces BF F and BF F at pins F and B , respectively. Denoting the virtual displacements of points B and F as B δ r and , F r respectively, and noting that P and D JJJG have the same direction, we have Virtual Work:
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