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000942
Dipl.-Ing. (FH) René Flori
2014-12-15

Combination of Linear and Nonlinear Supports

When defining real support conditions, it is always necessary to combine linear and nonlinear support conditions. A beam that rests on a wall can transfer compression into the wall; lifting forces are not to be absorbed by the line support (wall). These forces are to be transferred through bolts, for example, which are defined as linear nodal supports.

In general, you should clearly define the degrees of freedom on an FE node. If there is a nonlinear line support and a nodal support defined at the same location (node), RFEM displays a message warning that supported nodes lie on a supported line. This warning should not be ignored.

To achieve the right support reaction, you should define the node and line supports in a geometrically different location. To do this, you can copy and move the supported node a few centimeters downwards and connect the new and originally supported node with a coupling member. Now, you can move the nodal support to the new node.

Author

Mr. Flori is the customer support team leader and provides technical support for customers of Dlubal Software.

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