A portal frame P Q R as shown in figure has a fixed support at P and free end at R. A point load of 3 kN is acting at mid point of span QR. The flexural rigidity of each member is 104 kNm². Under the applied load, the vertical displacement would be 3 kN Q2m + A 4m 2m -R

h.w 2 Problems: 1. The cantilever truss in Figure is hinged at D and E. Find the force in each member. 1000 N Answer: FAB 2000 N tension FAC 1732.05 N compression FBC=866.02 N compression FBD = 2500 N tension Fco 2020.72 N tension FCE 3175.42 N compression

A bridge girder AB on a simple span oflength L =14 m supports a distributed load of maximumintensity q at mid-span and minimum intensityq/2 at supports A and B that includes the weight ofthe girder (see figure). The girder is constructed ofthree plates welded to form the cross section shown.Determine the maximum permissible load q basedupon (a) an allowable bending stress σallow =110 MPaand (b) an allowable shear stress τallow = 50 MPa.