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{live-template:Tutorial}


{{Tutorial
| name = Joint pattern |
| description = Learn how to apply joint pattern. |
| keyword = joint; joint pattern |
| program = SAP2000 |
| version = V12.0.1 |
| status = in progress |
| id = ok}} |


If your mesh is fairly fine, and you are looking for vertical loading on a slab, you can try the following as a workaround:

* For each loading patch or set of patches that act together, define a Joint Pattern: Define > Joint Pattern

!Define_pattern_names_form.png!

* Select the joints that are contained in the patch or patches, and Assign > Joint Pattern, and assign a constant “D” value equal to a dimensionless scale factor, such as 1.0.

!Pattern_data_form.png!

* Select the slab elements, and Assign > Area Loads > Surface Pressure, and assign the pressure to the top face (acts downward) in pressure units (force/area) in the appropriate Load Pattern (V11 Load Case):

!Area_surface_pressure_load.png!

* The pressure acting on each element will be interpolated from the values of the joint pattern, multiplied by the given value of pressure (5.0 in the above example). If only one joint in an element has a nonzero pressure, a quarter of the load will be applied. The pressure load multiplies by the tributary area of the elements, so that you do not have to calculate nodal forces by hand.