Consider a bridge (Figure 1), where all horizontal and vertical members have a fixed length a,...
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Consider a bridge (Figure 1), where all horizontal and vertical members have a fixed length a, with a vertical load P at each of the joints in the support along the deck as shown below (Figure 2). This load P corresponds to the load from the deck. For everything ahead, we will simplify the problem by considering it in 2D. Figure 2 (not to scale) below models the supporting side truss of the bridge. L K J I H A G В D E F PV PV PV P P. b) Identify all zero-force members. What would happen if you remove them from the bridge in Figure 1? Explain. c) Use the method of joints to find the internal forces in truss members AL, AB and BL (indicating if it is compressive or tensile). Draw the appropriate free body diagrams of the joints you chose to analyze. d) Use the method of section to find the internal forces in truss members CJ, CD and JK (in- dicating if it is compressive or tensile). Draw the appropriate free body diagrams of truss section you chose to analyze. Consider a bridge (Figure 1), where all horizontal and vertical members have a fixed length a, with a vertical load P at each of the joints in the support along the deck as shown below (Figure 2). This load P corresponds to the load from the deck. For everything ahead, we will simplify the problem by considering it in 2D. Figure 2 (not to scale) below models the supporting side truss of the bridge. L K J I H A G В D E F PV PV PV P P. b) Identify all zero-force members. What would happen if you remove them from the bridge in Figure 1? Explain. c) Use the method of joints to find the internal forces in truss members AL, AB and BL (indicating if it is compressive or tensile). Draw the appropriate free body diagrams of the joints you chose to analyze. d) Use the method of section to find the internal forces in truss members CJ, CD and JK (in- dicating if it is compressive or tensile). Draw the appropriate free body diagrams of truss section you chose to analyze.
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Related Book For
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073212227
8th Edition
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell
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