(a) Find the horizontal deflection at joint B produced by the 40-kip load in Figure P10.14. The area of all bars is shown on the sketch of the truss;E = 30,000 kips in2. (b) To restore joint B to its initial position in the horizontal direction, how much must bar AB be shortened? (c) If the temperature of bars ABand BC increases 80ºF, determine the vertical displacement of joint C. αt= 6.5 × 10−6(in/in)/ºF. The rocker at support A is equivalent to a roller.
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