Substructure Help

Footing/Pile

Depending on the abutment configuration selected, this dialog requires different input. For pile cap design option, user is allowed to define only pile locations and rest of the fields are not available. The footing can be defined only if user has selected Stem Wall option in abutment configuration screen. In this case, program assumes the footing is concentric with stem. If user wants to consider the effect of eccentricity, consider this effect during load definition.

To define only spread footing; input the pile size, length and capacity values as 0. For pile cap design option, user must define pile size and length under pile configuration. Program assumes fixed support at the bottom of the pile. If user wants to modify the bottom restraining conditions that needs to be defined using spring option. The spring should be used to consider the effect of different soil properties. To define, pile locations and batter; click the Edit pile button. Please refer to the Footing tab screen in the General Operation chapter to understand the different terms on pile pattern dialog.

Edit: Pile Locations Terms

SettingDescription
Bearing/Girder This dialog defines bearing or girder locations. For abutment, only single line of bearing can be defined.
Loads: The following load cases are modified in abutment design compared to pier design.
Dead Load Dead Load Case: The self weight of the back wall is not calculated by default. User must select the option to calculate dead load due to back wall on the auto generation dialog as shown below:
Note: Program calculates the back wall as linear load acting on the stem. It calculates the total moment about x axis acting at midspan location.

If you do not want to generate the back wall dead load, uncheck the box for backwall.