$[\begin{matrix} \frac{E A}{L} & 0 & 0 & 0 & 0 & 0 & - \frac{E A}{L} & 0 & 0 & 0 & 0 & 0 \\ 0 & \frac{12 E I_{z}}{L^{3}} & 0 & 0 & 0 & \frac{6 E I_{z}}{L^{2}} & 0 & \frac{- 12 E I_{z}}{L^{3}} & 0 & 0 & 0 & \frac{6 E I_{z}}{L^{2}} \\ 0 & 0 & \frac{12 E I_{y}}{L^{3}} & 0 & - \frac{6 E I_{y}}{L^{2}} & 0 & 0 & 0 & \frac{- 12 E I_{y}}{L^{3}} & \frac{- 6 E I_{y}}{L^{2}} & 0 \\ 0 & 0 & 0 & \frac{G J}{L} & 0 & 0 & 0 & 0 & \frac{- G J}{L} & 0 \\ 0 & 0 & \frac{- 6 E I_{y}}{L^{2}} & 0 & \frac{4 E I_{y}}{L} & 0 & 0 & 0 & \frac{6 E I_{y}}{L^{2}} & 0 & \frac{2 E I_{y}}{L} & 0 \\ 0 & \frac{6 E I_{z}}{L^{2}} & 0 & 0 & 0 & \frac{4 E I_{z}}{L} & 0 & \frac{- 6 E I_{z}}{L^{2}} & 0 & 0 & 0 & \frac{2 E I_{z}}{L} \\ \frac{- E A}{L} & 0 & 0 & 0 & 0 & 0 & \frac{E A}{L} & 0 & 0 & 0 & 0 & 0 \\ 0 & \frac{- 12 E I_{z}}{L^{3}} & 0 & 0 & 0 & 0 & 0 & \frac{- 12 E I_{z}}{L^{3}} & 0 & 0 & 0 & - \frac{6 E I_{z}}{L^{2}} \\ 0 & 0 & \frac{- 12 E I_{y}}{L^{3}} & 0 & \frac{6 E I_{y}}{L^{2}} & 0 & 0 & 0 & \frac{12 E I_{y}}{L^{3}} & 0 & \frac{6 E I_{y}}{L^{2}} & 0 \\ 0 & 0 & 0 & \frac{- G J}{L} & 0 & 0 & 0 & 0 & 0 & \frac{G J}{L} & 0 & 0 \\ 0 & 0 & \frac{- 6 E I_{y}}{L^{2}} & 0 & \frac{2 E I_{y}}{L} & 0 & 0 & 0 & \frac{6 E I_{y}}{L^{2}} & 0 & \frac{4 E I_{y}}{L} & 0 \\ 0 & \frac{6 E I_{z}}{L^{2}} & 0 & 0 & 0 & 0 & 0 & \frac{- 6 E I_{z}}{L^{2}} & 0 & 0 & 0 & \frac{4 E I_{z}}{L} \end{matrix}]$