Analysis of time-dependent internal forces with conventional computer programs - Concrete Structures: Stresses and Deformations - page 180

Figure 6.2 Global axes, degrees of freedom and the order of numbering of the coordinates
at typical nodes.

perpendicular to the plane of the frame; for a space frame member the input
must give I y * , I z* and J , the second moment of area about centroidal principal
axes y * and z * and the torsion constant; for a member of a grid, the input
must include the second moment of area, I z* about centroidal principal axis
z * and the torsion constant J . All members are assumed to have constant
cross-sections.
Images of an input data fi le are shown in each of Figs. 6.4 and 6.5. The fi rst

input le is for computer program SPACET 2 for the analysis of a space truss

(Fig. 6.10), to be discussed in Example 6.4, Section 6.8. The second input

fi

le
is for computer program PLANEF 3 for the analysis of a plane frame (Fig.
6.11), to be discussed in Example 6.5, Section 6.8. The integers and the real
values given on the left-hand sides of Figs. 6.4 and 6.5 are the input data to be
used by the computer; the words and the symbols on the right-hand side of
the

fi

fi gures indicate to the user the contents of each data line.

Notation : The symbols employed in Figs. 6.4 and 6.5 are de fi ned below:

NJ , NM , NSJ and NLC number of joints, number of members, number of

supported joints and number of load cases,
respectively.