%% 
%%  Ein Beispiel der DANTE-Edition
%% 
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pst-stru}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-1,-4)(9,2) \psset{arrowsize=0.8mm,arrowinset=0}
  \pnode(0,0){A}\pnode(2,0){B}\pnode(8,0){C}\rput{0}(C){\hinge}\rput{0}(B){\roller}
  \psline[linecolor=red,fillcolor=yellow,fillstyle=solid](0,0)(8,0)(8,1)(0,0)
  \multido{\nStart=1.00+0.025}{-37}{%
    \psArrowCivil[RotArrows=0,length=\nStart,start=\nStart,linecolor=magenta](A)(C){}}
  \rput(8.3,0.4){\large p}\rput(0,-0.4){\Large A}
  \rput(2,-1){\Large B}\rput(8.3,-0.6){\Large C}
  \pcline[offset=0,linecolor=blue]{|-|}(0,-3)(2,-3)\lput*{:U}{\bf $\frac{l}{3}$}
  \pcline[offset=0,linecolor=blue]{|-|}(2,-3)(8,-3)\lput*{:U}{\bf $l$}
  \def\MflettAB#1#2#3{#1 #2 div -.125 mul x mul x mul x mul #3 mul neg}
  \pscustom[linecolor=blue,linewidth=1pt,fillstyle=hlines]{
    \psplot[]{0}{2}{\MflettAB{6}{6}{0.15}}\psline[](2,0)(0,0) }
  \def\TaglioAB#1#2#3{#1 #2 div -.375 mul x mul x mul #3 mul} %AB
  \pscustom[linecolor=green,linewidth=1pt,fillstyle=crosshatch]{
    \psplot[]{0}{2}{\TaglioAB{6}{6}{0.15}}\psline[](2,0)(0,0) }
  \def\MflettBC#1#2#3{#1 #2 div -.125 mul x mul x mul x mul
    #1 3.375 div #2 mul x mul add #1 10.125 div #2 mul #2 mul sub #3 mul neg}% BC
  \pscustom[linecolor=blue,linewidth=1pt,fillstyle=hlines]{
    \psplot[]{2}{8}{\MflettBC{6}{6}{0.15}}\psline[](8,0)(2,0) }
  \def\TaglioBC#1#2#3{#1 #2 div -.375 mul x mul x mul #1 3.375 div #2 mul add #3 mul}
  \pscustom[linecolor=green,linewidth=1pt,fillstyle=crosshatch]{
    \psplot[]{2}{8}{\TaglioBC{6}{6}{0.15}}\psline[](8,0)(2,0)(2,1.4) }
  \psline[linewidth=1.5pt](0,0)(8,0)  % Printing beam AC after diagrams BM/S
  \rput(3,1.6){\em {\scriptsize Shear diagram (green boundary)}}
  \rput(3,-1.6){\em {\scriptsize Bending Moment diagram (blue boundary)}}
  \rput(2,-1.9){\scriptsize [assumed positive downwards]}
  \rput(5,-1){\bf {\large +}}\rput(2.5,0.6){\bf {\large +}}
  \rput(7.7,-1.3){\bf {\Large -}}
\end{pspicture}
\end{document}
