RAM Concept Help

Creating a new precompression plan

The following example demonstrates configuring span segments to calculate precompression and then creating a precompression plan for the User Minimum Rule Set.

To create the precompression plan:
  1. Choose Layers > New Plan.
  2. Type a name. For example, Precompression. RAM Concept automatically appends the word "plan" to the name and prepends the layer name.
  3. Select the User Minimum layer and then click OK. The Visible Objects dialog box appears.
  4. Click Show Nothing and then click OK.
  5. Choose View > Plot (). The Plot dialog box appears.
  6. Select the Section Analysis tab.
  7. Check Active.
  8. Toggle Precompression under Value.
  9. Click OK.

The span segments must be configured to calculate precompression prior to viewing precompression stresses. To configure existing span segments:

  1. Select one or more existing span segments modeled on Layers > Design Strip > Latitude Design Spans Plans.
  2. Choose Edit > Selection Properties. The Edit Selected Items dialog box appears.
  3. Select the General tab.
  4. Check Consider as Post-Tensioned.
  5. Select FseAps/Ac for Precompression Calc.

    This will plot the effective tendon force multiplied by the perpendicular vector component of the tendon area intersecting the section divided by the cross section area and will not include restraining effects of walls and columns.

  6. Click OK.