2-1 - 83 CHAP 2. UNIAXIAL BAR AND TRUSS ELEMENTS DIRECT...

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Unformatted text preview: 83 CHAP 2. UNIAXIAL BAR AND TRUSS ELEMENTS DIRECT METHOD 1. Three rigid bodies, 2, 3 and 4, are connected by four springs as shown in the figure. A horizontal force of 1,000 N is applied on Body 4 as shown in the figure. Find the displacements of the three bodies and the forces (tensile/compressive) in the springs. What is the reaction at the wall? Assume the bodies can undergo only translation in the horizontal direction. The spring constants (N/mm) are r 1 = 400, r 2 = 500, r 3 = 500, and r 4 = 300. Solution: Element equilibrium equations: (1) 1 1 (1) 2 2 1 1 400 1 1 f u u f , (2) 2 2 (2) 3 3 1 1 500 1 1 f u u f (3) 1 1 (3) 3 3...
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2-1 - 83 CHAP 2. UNIAXIAL BAR AND TRUSS ELEMENTS DIRECT...

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