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h1. Model Descriptiondescription

* 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|kb:Load case] as follows:
(all these loads should cause similar effect as if the bridge is loaded in the middle by a 10kN point load):\\
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** Point load: 10kN load applied at station 20, transversely centered.
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** Lineal load: 1kN/m load applied between stations 15 and 25, transversely centered.
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** Area load: 0.1kN/m^2 load applied between stations 15 to 25 across the width of the deck.
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These loads will all cause an effect equivalent to loading the bridge midspan with a 10kN point load

* Run the analysis and check the midspan moments. For point loadloading, the theoretical midspan moment is (PL/4) = (10kN) (40m) / 4 = 100 kN-m.

given as follows:

!geometry sketch.png|border=1!

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|Applying point, line, and area loads to bridge objects^CSI Bridge model.zip] (Zipped Model files)