Advanced Methods of Structural Analysis

Problems 269

7.28.The portal frame is subjected to settlementsa,b,and'of supportB.Cal-
culate the free terms of canonical equation of the force method for three different
versions of a primary system.

X 1

X 3

X 2

X 1

X 3 X 2

X 1

X (^3) X 2
φ
l b
A
h
a
B
Design
diagram Version 1 Version 2 Version 3
Fig. P7.28
Ans.
Version of primary
system 1d 2d 3d
1 b Ca '
2 Cb aCl' C'
3 2hb al 2hb Cal Cbh