Auto Hinge Assignment Data Form

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.

Use the Auto Hinge Assignment Data form to specify that the auto hinge be based on tables in FEMA 356 or Caltrans 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 FEMA 356 option. When this option is selected, use the Select a FEMA356 Table drop-down list to select the basis for the hinge type. The Table selected determines the other input required on the form.
Component Type area. Choose that the hinge be a Primary or Secondary component, which affects the LS and CP acceptance criteria items for the hinge.
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).
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.
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 FEMA Table 6-7. 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.
V Value From options (Concrete Beam). The V Value is used to calculate the ratio, which is a parameter specified in FEMA Table 6-7. V can be obtained from the 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.
P and V Values From options (Concrete Column). The P Value is used to calculate the ratio, which is a parameter specified in FEMA Table 6-8 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 FEMA Table 6-8. P and V can be obtained from the results obtained from the analysis 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 analysis 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 ratio, which is a parameter specified in FEMA Table 5-6. P can be obtained from the 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. 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 for the ratio, 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.

Caltrans 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.
P Value From options. The P ratio, , is a parameter specified in FEMA Table 5-6. 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 and Use Idealized (Bilinear) Moment-Curvature Curve check box. Specify the hinge length in this edit box. As the name suggests, the program uses an idealized moment-curvature curve when the Use Idealized (Bilinear) Moment-Curvature Curve check box is checked.
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).

Return to SAP2000 Index

Your Ad Here