고체역학 (Gere) — Axially Loaded Members: Problem 2.5-23

2.5-23 Wires B and C are attached to a support at the left-hand end and to a pin-supported rigid bar at the right-hand end (see figure). Each wire has cross-sectional area \(A = 19.3 \text{ mm}^2\) and modulus of elasticity \(E = 210 \text{ GPa}\). When the bar is in a vertical position, the length of each wire is \(L = 2.032 \text{ m}\). However, before being attached to the bar, the length of wire B was \(2.031 \text{ m}\) and wire C was \(2.030 \text{ m}\). Find the tensile forces \(T_B\) and \(T_C\) in the wires under the action of a force \(P = 3.115 \text{ kN}\) acting at the upper end of the bar.