It has been decided to analyze the plane truss shown in Figure E1(a) by using symmetric and anti-symmetric components of loads. By applying appropriate boundary conditions at nodes 4 and 5, the...

It has been decided to analyze the plane truss shown in Figure E1(a) by using symmetric and anti-symmetric components of loads. By applying appropriate boundary conditions at nodes 4 and 5, the reduced half portion of the truss has been analyzed for four cases. Cases 1 and 2 correspond to unit horizontal load applied at node 2, as shown in Figure E1(b). The displacements at all joints and member forces are summarized in Tables E1.1 and E1.2, respectively, for Cases 1 and 2. On the other hand, Cases 3 and 4 correspond to unitvertical load applied at node 3, as shown in Figure E1(c). The displacements at all joints and member forces are summarized in Tables E1.3 and E1.4, respectively, for Cases 3 and 4. Identify each case and using the data of these four cases, compute, for the truss shown in Figure E1(a), (I) displacements at all nodes; and (II) force in all elements. Consider the axial rigidity AE of all the elements to be 10,000 kN in the actual truss.