Action > PushOverD
Calculation of demand of the structure in Pushover analysis. A reference load case containing the definition of load case and RM-Set for plotting the demand curve must be specified.
The PushoverD analysis in RM Bridge performs computation of performance point for a given capacity curve and response spectra input. The capacity curve is assumed to be derived from the specified reference loadcase and is used in computing the performance point load case. The action dialog provides user control for procedure input, response spectra name and type of response spectra. Three approaches have been implemented in RM Bridge for calculating the inelastic displacement demands for a given representation of ground motions. These are (1) FEMA 440: Displacement Modification (Improved Capacity-Spectrum method of ATC-40), (2) FEMA 440: Equivalent Linearization (Improved Coefficient method of FEMA-356), and (3) Euro Code 8 (EC 8): N2 Method. Based on the project requirement, user can select either of three procedures while defining. The implementation of these procedures is derived from FEMA 440 and Euro Code 8. User can refer to these documents for more mathematical details. The computation of performance point using these procedures require more input information and is inputted via the Diagram RM-Set input. Response spectra input requires reference to a variable "table" which is representative of elastic response spectra. If the type is defined as time series then this variable "table" is assumed to represent ground acceleration data in the units of g. The list file name is optional and in case it is not specified, list file with "PushoverD-Reference Load Case Name.lst" is automatically generated.
Setting | Description |
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Action | Code of the selected Action. It is possible to switch to another action without leaving and re-entering the input function. |
Action will be skipped (Option) | The action will be skipped in the calculation process if the option is selected. |
The capacity curve is assumed to be derived from the specified reference loadcase and is used in computing the performance point load case results. | |
EC 8: N2 Method, FEMA 440 Displacement Modification, and FEMA 440 Equivalent Linearization can be selected. | |
This is the name of the response spectra variable table. If Response spectra type is time series then this variable table is assumed to represent ground acceleration data in the units of g. | |
Spectra or Timeseries | |
This is the Diagram RM-Set where diagrams and other Pushover input is defined. | |
This is the name for storing performance point load case results. |
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List file name to list load case results. | |
Delta-T | Duration of the Action (not applicable for this action) |
Description | Descriptive text for the selected Action (max. 80 characters) |