Question

Problem 3 ( 20 Points) For the shown truss: 1 Determine the force in member BD using the force method. EA= constant 2. If there is an increase in temperature in member AD, does the increase ? briefly justify your answer. perature in member AD, does the force in member BD decrease or lo + 3 m +

Answer 1

& Mat 0=0 TOKN 3 m Ayu 3-10X320 2=0, = 10 Kad to oyaloknot Zhro, Ax-100 Ax - Ax = lokna Consider Boa redundant member LORN 0 080+ Frp foo go - 10 B Dace Emer + vitual Wok method det content content M + (-10) (-Y)X3 - 1of2x TAVE A " A Bos 102-426 toe so = som +60 80 = hy 474**s 4 axenata AE 101.426 ME + feo 14.495 =0 FED - 7.071 KN compreviou F3p = - 24 (LK 4T) 2 3424 ferre vinduese to temportere - increase of berryntur Cic. for membex AD, LOT-tre fro -+]. 14.485 (*) ar 14 = tve So Tendon Preesret in for members Sinee member Spin Compressim so frices in Member Bo will Teduued.