Chapter 14 : Analysis of Perfect Frames (Graphical Method) 301
S.No. Member Magnitude of force in terms of P Nature of force (stress)1 BJ, GS 6.73 Compression
2 JI, IS 6.25 Tension
3 JK, RS 1.00 Compression
4 CK, RF 6.73 Compression
5 KL, QR 1.60 Tension
6 LI, IQ 1.00 Tension
7 LM, PQ 1.50 Compression
8 DM, EP 5.40 Compression
9 MN, OP 1.95 Tension
10 NI, IO 4.75 Tension
11 NO 0 —EXERCISE 14.1
- Figure 14.19, shows a warren girder consisting of seven members each of 3 m length freely
supported at its end points. The girder is loaded at B and C as shown. Find the forces in all the
members of the girder, indicating whether the force is compressive or tensile.
Ans. AB = 2.9 kN (Compression)
AE = 1.4 kN (Tension)
CD = 4.0 kN (Compression)
DE = 2.0 kN (Tension)
BE = 0.6 kN (Tension)
BC = 1.7 kN (Compression)
CE = 0.6 kN (Compression)
Fig. 14.19.