Auto Hinge Assignment Data Form

Use the Auto Hinge Assignment Data form to specify that the auto hinge be based on tables in ASCE 41-13, ASCE 41-17 or Idealized Flexural Hinge specifications.

Auto Hinge Type drop-down list. The option chosen in this drop-down list determines the other options available on the form.
- From Tables in ASCE 41-13 or ASCE 41-17 options. When these options are selected, use the Select a Hinge Table drop-down list to select the basis for the hinge type. The Table selected determines the other input required on the form.
- - Degree of Freedom options. When these options appear on the form, choose the appropriate degree of freedom for the hinge.
  - Deformation Controlled Hinge Load Carrying Capacity options. Choose the appropriate option:
  - - Drops Load After Point E option. When this option is selected, the load carrying capacity drops to zero at point E.
    - Is Extrapolated After Point E option. When this option is selected, the load carrying capacity is extrapolated at point E (typically extrapolated parallel to line D-E; see the figure in the Frame Hinge Property Data for Property Name Form - Deformation Controlled topic).

1. - Transverse Reinforcing is Conforming check box (Concrete beams and columns). When this check box is checked, the transverse reinforcing is conforming. When it is unchecked, the reinforcing is not conforming.
  - Concrete Column Failure Condition options (see ASCE 41-13 Section 10.4.2.2.2 for definitions). Choose the appropriate option:
  - - Condition i - Flexure option
    - Condition ii - Flexure/Shear option
    - Condition iii - Shear option
    - Condition iv - Development option
  - Hinge Drops Load When Max Force Is Reached check box (Steel columns). When this check box is checked, the hinge capacity drops to zero when the maximum force is reached. When the check box is unchecked, the hinge behavior is linear elastic.
  - Reinforcing Ratio (p-p'/pbalanced) options (Concrete Beam). The Reinforcing Ratio, , is a parameter specified in ASCE 41-13 and ASCE 41-17 Table 10-7. It can be determined by the program From Current Design (i.e., the last concrete design performed), or it can be the value specified in the User Value edit box.
  - Shear Reinforcing Ratio p=Av/(bw*s) options (Concrete Column). The reinforcing Ratio, Av/(bw*s), is a parameter specified in ASCE 41-13 and ASCE 41-17 Table 10-8. It can be determined by the program From Current Design (i.e., the last concrete design performed), or it can be the value specified in the User Value edit box.
  - V Value From options (Concrete Beam). The V Value is used to calculate the ratio, which is a parameter specified in ASCE 41-13 and ASCE 41-17 Table 10-7. V can be obtained from the results obtained from the load case selected in the Case/Combo drop-down list, or it can be the User Value specified in the edit box. The results from a specified load case are those obtained the last time the analysis was run.
  - P and V Values From options (Concrete Column ASCE 41-13). The P Value is used to calculate the ratio, which is a parameter specified in ASCE 41-13 Table10-8 The P Value is also the axial load value at which the M2, M3, and M2-M3 yield moments are calculated. The V Value is used to calculate the ratio, which is a parameter specified in ASCE 41-13 Table 10-8. P and V can be obtained from the results obtained from the load case selected in the Case/Combo drop-down list or the User Value specified in the P and V2 and V3 edit boxes. The results from a specified load case are those obtained the last time the analysis was run
  - P Value From options (Steel Column). The P Value is used to calculate the P/PCL ratio, which is a parameter specified in ASCE 41-13 Table 9-6, or the PG/Pye ratio which is a parameter specified in ASCE 41-17 Table 9-7.1. P can be obtained from the results obtained from the load case selected in the Case/Combo drop-down list, or it can be the User Value specified in the edit box. The results from a specified load case are those obtained the last time the analysis was run. The P Value is also the axial load value at which the M2, M3, and M2-M3 yield moments are calculated.
  - P Values From (Concrete Column ASCE 41-17). The gravity plus lateral load P value is used for N_UD in ASCE 41-17 tables 10-8 and 10-9. The gravity P value is used for the axial force in other equations.
  - Not Controlled by Inadequate Development or Splicing (Concrete Column ASCE 41-17). Choose the option to indicate if the hinge is controlled by inadequate development or splicing. This is used in ASCE 41-17 tables 10-8 and 10-9.
  - Shear Demand at Flexural Yielding/Shear Capacity (V_yE/V_ColOE)(Concrete Column ASCE 41-17). Choose the option for how to specify the ratio V_yE/V_ColOE that is used in ASCE 41-17 tables 10-8 and 10-9 when the column is not controlled by inadequate development or splicing.
  - Shear Reinforcement Spacing Ratio (s/d) (Concrete Column ASCE 41-17). This item is used when calculating V_yE/V_ColOE for use in ASCE 41-17 tables 10-8 and 10-9.

Note: If the Case/Combo option is used for P or V or the From Current Design option chosen, generated hinge properties may change when design or analysis results change. Thus, the analysis and design will need to be iteratively run until their results are constant from one run to the next before the hinge properties will remain constant from one run to the next.

- Idealized Flexural Hinge option. When this option is selected, use the other options on the form to specify the hinge properties for this hinge assignment/definition.
- - Degree of Freedom options. When these options appear on the form, choose the appropriate degree of freedom for the hinge.
  - Total Number of M2-M3 Points edit box. Specify the total number of points on the interaction curve (for M2-M3 hinges only).
  - Total Number of PM Curves edit box. Specify the total number of the PM curve (for P-M2-M3 hinges only).
  - Max Num Points on Each PM Curve edit box. Specify the maximum number of points on each PM curve (for P-M2, P-M3, and P-M2-M3 hinges only).
  - P Value From options. The P ratio, , is a parameter specified in ASC Table 9-6. P can be obtained from the last results obtained from the analysis case selected in the Case/Combo drop-down list, or it can be the User Value specified in the edit box. The results from a specified analysis case are those obtained the last time the analysis was run.
  - Hinge Length edit box. Specify the hinge length in this edit box. This will be used to multiply the bending curvature to determine total rotation.
  - Use Idealized (Bilinear) Moment-Curvature Curve check box and Design Code drop-down list. When checked, this will generate a hinge based on idealized (bilinear) moment-curvature curves. One curve is calculated for each P-M2-M3 point using either the Caltrans or JTG/T code specifications, and the yield points define the interaction service.
  - Deformation Controlled Hinge Load Carrying Capacity options. Choose the appropriate option:
  - - Drops Load After Point E option. When this option is selected, the load carrying capacity drops to zero at point E.
    - Is Extrapolated After Point E option. When this option is selected, the load carrying capacity is extrapolated at point E (typically extrapolated parallel to line D-E; see the figure in the Frame Hinge Property Data for Property Name Form - Deformation Controlled topic).

Access the Auto Hinge Assignment Data form as follows:

Select a frame object(s) to be assigned auto hinge properties.
Click the Assign menu > Frame > Hinges command to access the Frame Hinge Assignments form.
Select the Auto option from the Hinge Property drop-down list and click the Add button. Alternatively, highlight a previously assigned Auto hinge property and click the Modify/Show Auto Hinge Assignment Data button.