OpenBridge Modeler

To place segmental balanced cantilever

To place a balanced cantilever build of segments at a bridge pier, use the following procedure.

You must use an existing segment template. You must have at least one supportline present in your model.
The balanced cantilever method of construction is modeled so that the build order can be set for analytical software, such as RM Bridge.
  1. Either:

    On the Home ribbon tab, select the Place Segmental > Place tool in the Superstructure group


    key in bmgeom segmental placebalance

  2. In the Place Cantilever Segmental tool settings dialog, select the segment template to use:
    1. Click […] adjacent to the Template Name setting. The Template Selection dialog opens.
    2. In the Standard Templates list, select the template name to use.
    3. Click OK.
  3. (Optional) Type an integer in the Build Order field.
    Tip: The Build Order number is incremented automatically from the highest previously placed build order number for the bridge when you place a balanced cantilever.
  4. Specify the length of different segment types that can be placed:
    To include a Do this
    Series of segments in the balanced cantilever Type a one or more N@L (number of segments at each length) values in the Seg. Length field. The ahead and back station cantilevers can be different arrangements of typical segments.

    A vertical bar ("|") is used to differentiate the segments for back and ahead stations, in that order. A space (" ") is used to vary segment lengths within the back or ahead balanced cantilevers.

    Optional pier segment Type a length or two lengths separated by a colon (":") in the Pier Seg Length field.
    Optional cast-in-place segment at ends of the cantilevers Type a length in the CIP Length field.
  5. (Optional) Specify additional settings such as offsets.
  6. (Optional) Clear the Add Constraints check box if no additional placement constraints are required for this segment.
    Tip: You can add constraints over the entire bridge unit length after all balanced cantilever builds are placed from the Project Explorer window.
  7. In the view window, do the following:
    1. Data point on a supportline.
    2. Data point again to accept.
    If you checked the Add Constraints option, then the Solid Constraints Definition dialog opens.
  8. Specify any necessary point or variable constraints along the deck and then click Apply.
The balanced cantilever is added on the selected supportline.
You can continue to place balanced cantilevers at supportlines to complete the model of your bridge. When complete, you will need to add closure pours between the cantilever ends.