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Live Template
templateTest Problem

The internal forces and capacities of a beam are calculated with respect to the cross-section center of gravity. This test problem studies the modeling of a rectangular and continuous beam which is solid along the left segment and hollow along the right. This void is located along the bottom of the element.


  1. Draw element chords to account for the difference in center-of-gravity location, as shown in the middle image of each figure.

  2. Use a bottom-center insertion point to draw the two segments along the same line as shown in the bottom image of each figure.

Figure 1 - Modeling approaches

Figure 2 - Corresponding depth profile

To demonstrate how each of these conditions affects response, a straight tendon is modeled below each beam. Tendon deflection and internal moment (relative to cross-section centroid) is presented. Results are correctly reported only for the second and third case, where the solid and hollow sections properly align.

Figure 3 - Displacement

Figure 4 - Moment


Related incident
commentAligning solid and hollow sections.