고체역학 (Gere) — Axially Loaded Members: Problem 2.2-14

2.2-14 The three-bar truss ABC shown in the figure part a has a span $L = 3\text{ m}$ and is constructed of steel pipes having a cross-sectional area $A = 3900\text{ mm}^2$ and modulus of elasticity $E = 200\text{ GPa}$. Identical loads $P$ act both vertically and horizontally at joint $C$, as shown. (a) If $P = 475\text{ kN}$, what is the horizontal displacement of joint $B$? (b) What is the maximum permissible load value $P_{\text{max}}$ if the displacement of joint $B$ is limited to $1.5\text{ mm}$? (c) Repeat parts (a) and (b) if the plane truss is replaced by a space truss (see figure part b).