Question

The device shown in Fig. 2 aa cons its of a horoontฝ beam Aac wpported by two vertical bars BD and CE Bar CE is pinned at both ends but bar BO is fixed to the foundation at its lower end The distance from A to 8 is 450 mm aned from 8 to C is 225 mm. Dars BD and CE have lengths of 480 mm and 600 m respectively, and their c ros-sectional areas are 1020 mm and 320 mm, respectively. The bars are made of steel having a modulus of a licity E 205 GPa Assuming that beam A8C is rigid determine the following (a) Find the maximum allowable load Pi the displacement of point A s limited to 1 0 mem (b) If P 25 kN, what is the required crow-sectional area of bar CE so that the displacement at point A is equal to 1.0mm) 450.mm25 mm 120 mm CE a0 225 mm.

Answer 1

450 mm 2.25 n AD CE 20m 01 CE - Sc Sa

ME C. C서 22, 5- 225+4so 1(.257x1ס" p + o.ool 23. 12 kN

25kA 3 205X10 CE on CE