ELLA. Transverse influence line

SOFiSTiK Teddy
1

For a girder modeled with plate elements, it is possible to calculate transverse influence lines. To do this, the INT parameter in the LSEL record must be set to 3, 5, 7, or 9. During the calculation, ELLA automatically attempts to identify neighboring nodes. If this process fails, the user can assist by specifying QGRP in the RSEL or LSEL parameters or adjusting DZ.

Question for clarification:
Do I understand correctly that the neighboring nodes are only used to define the sections where transverse influence lines are calculated—not to apply unit loads? In other words, the nodes where unit loads are actually applied are not exposed to the user in any way.

2

Correct, the nodes serve merely as an indication that the superstructure is actually present along a lane axis, and therefore that loads can be applied. The loads themselves are always applied within a section (perpendicular to the lane axis), distributed across the lane width - as shown in the images with the transverse influence lines.

1 Like