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h1. Model Description

* Create new model from template: simple span, 40m long, with steel girders cross-section.
* Release the bearing at the end abutment to achieve a simply supported condition.
* Define point, line and area loads in a separate load cases as follows (all these loads should cause similar effect as if the bridge is loaded in the middle by a 10kN point load):
** Point load: 10kN load applied at station 20, transversely centered.
** Lineal load: 1kN/m load applied between stations 15 and 25, transversely centered.
** Area load: 0.1kN/m^2 load applied between stations 15 to 25 across the width of the deck.
* Run the analysis and check the midspan moments. For point load, the theoretical midspan moment is (PL/4) = (10kN) (40m) / 4 = 100 kN-m.

!geometry sketch.png!

h1. Model Development

h2. Define and apply loads

Use "Loads > Loads - Point" command to define new point load:

!point loads 1.png!

Use "Bridge > Loads > Point Loads" to assign the previously defined point loads:

!point loads 2.png!

Using similar approach as described above, define and apply lineal and area loads.

h1. Results

The moment diagrams below show that the maximum midspan moment is as expected:

!point load moment diagram.png!

!lineal load moment diagram.png!

!area loads moment diagram.png!

h1. Attachments

* [SAP2000 model|^SAP2000 model V15.0.0_L.zip]