Load Combination
CIP RC/PT Girder creates certain default load combinations. The user may specify any number of additional load combinations. CIP RC/PT Girder calculates the combined responses based on the load factors specified for each load type. The prestress load factor in all cases is 1.0.
| Deflection | The combined deflections are calculated based on the summation of the individual deflection responses. |
| Forces | The combined forces and moments at each POI are calculated based on the summation of individual responses. |
| Stresses |
The combined stresses at each POI are calculated based on the combined forces and moments at the POI, using the cross section properties for the POI. This is performed by first calculating the forces and moments for the concrete portion only, and then calculating the stresses, and is equivalent to using transformed section properties. Cracked section analysis is used for reinforced concrete bridges. |
| Reactions | The combined reactions at each POI are calculated based on the summation of individual responses. |