Question

Spring 2019 Final Exam ENGR:2750:AAA Problem #1 (50 points) The members of the truss shown need to be designed so they can safely carry the loading shown. All truss members are made of steel for which Est 200 GPa. 10m Find the members having the largest internal compressive forces. All members in the truss are pin-connected at both ends. a) 10kN 10kN b) If a factor of safety against buckling having a value of 2 is required, calculate the require moment of inertia in the member(s) with the largest internal compressive forces. 10m 10m You can neglect buckling of compression members in the out-of-plane direction.

Answer 1

rm Fac Sin 26-S6 mem mem At joint D m2m ED IokN ma

Ert 10 RAE 2656 Joi E an 尺 RBE =-10 o M

oint A A. AG RAH - FAG Sin Sin 63.11 Aß in tension . 2