Dead Loads
Dead loads on precast can be modeled only as Line, Trapezoidal, or Point Loads; however, dead loads on composite can be modeled as Line, Trapezoidal, Point, and Area loads. In the case where you specify an area load and a width over which this load applies, Precast/Prestressed Girder multiplies the two together and analyzes it as a line load acting on the continuous beam model, as discussed in the previous section. The resulting moments and shears are then distributed to each beam using the dead load distribution/tributary fraction factors.
Load Type | Distribution to Girder | |
---|---|---|
Non-Composite Loads | Self weight of girder | Computed by program. |
Non-Composite Loads | Self weight of Haunch | Calculated by program based on tributary width of slab. |
Non Composite Loads |
Self weight of Sacrificial Deck Thickness and Effective Slab Thickness |
Calculated by program based on tributary width of slab. |
Non Composite Loads |
Dead Loads on Precast |
User input per girder. |
Non-Composite Loads | Diaphragm loads | User input per girder. |
Composite Loads | Dead load on composite | User input for bridge, auto-distributed to girder based on tributary width fraction. |