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 or Buckling Restrained Brace 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 option. When this option is 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 Hinge Property Data for Property Name Form - Deformation Controlled topic).

• • Transverse Reinforcing is Conforming check box (Concrete beams). 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 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 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 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 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). The P Value is used to calculate the ratio, which is a parameter specified in ASCE Table 10-8  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 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

1. • P Value From options (Steel Column). The P Value is used to calculate the P/PCL ratio, which is a parameter specified in ASCE Table 9-6. 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.

   Note:  If the Case/Combo option is used for P or V or the From Current Design option is used, 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.

Access the Auto Hinge Assignment Data form as follows:

1. Select a frame or wall object(s) to be assigned auto hinge properties.

2. Click the Assign menu > Frame > Hinges command to access the Frame Assignments - Hinges form or the Assign menu > Shell > Wall Hinge command to access the Shell Assignment - Hinges form..

3. 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.