Displacement coordinates for the beam are as shown in figure. The flexibility matrix is given by:
1
\(\frac{1}{{EI}}\left[ {\begin{array}{*{20}{c}} {64/3}&{ - 8}\\ { - 8}&{64} \end{array}} \right]\)
2
\(\frac{1}{{EI}}\left[ {\begin{array}{*{20}{c}} {64/3}&8\\ 8&{ - 64/3} \end{array}} \right]\)
3
\(\frac{1}{{EI}}\left[ {\begin{array}{*{20}{c}} {64/3}&8\\ 8&4 \end{array}} \right]\)
4
\(\frac{1}{{EI}}\left[ {\begin{array}{*{20}{c}} 4&{ - 8}\\ { - 8}&{64 - 3} \end{array}} \right]\)