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GM Suite Selection Dialog

 

 

 

The QuakeSelect module provides enhanced record selection and scaling by selecting suites with optimal spectral shapes and statistics matching those of the target spectrum, while satisfying a variety of seismological, statistical, and code constraints.

 

Below is a brief description of the steps involved in Ground Motion Suite Selection:

 

1.Choose Match Type (Components, Bidirectional, or Custom)

2.Define the Target Spectrum, Fitting Criteria, Target Type and weight (weight only available in "Custom" Matching type)

3.Select Collection/Record Suite from which to select records,

4.Choose record filtering criteria

5.Specify Number of records in suite (e.g. 11)

6.Specify desired number of pulses in the suite (and their periods)

7.Specify the suite average parameters (Magnitude and Distance)

8.Customize the suite selection algorithm and set advanced parameters (Optional)

9.Run the suite selection search

10.Explore the results

 

 

Match

QuakeManager enable users to select the type of records to be selected from the three available "Match" options:

1.Components: ability to match individual record components (Horizontal H1 & H2 and Vertical)

2.Bidirectional: ability to match both horizontal components (H1 and H2)

3.Custom: ability to match up to three target spectra and target types with different or same fitting criterion

Target Spectrum & Fitting Criteria

Select a pre-defined Target Design Spectrum, Fitting Criteria and Target Type.

Record Source & Filtering

Record Source: Select the source Library Collection or Record Suite from which to select records. It is possible to search for records in a pre-defined Record Suite object (in the Project), a Collection in the Ground Motion Library, or in the full GM Library.

Record Filtering: Enter the criteria for selecting acceptable records from the source collection or suite

Suite Selection Method

Use same SF for all records: If desired, the user can choose to select a suite in which all records having the same scale factor (SF).

 

Number of runs to perform: users may define a number in which QuakeManager will run to find random suites with the selected filters. Increasing this number helps users to find solutions when having strict filtering options

 

Number of Top Suites to Keep: Users may specify of the desired number of suites to be generated (default is 8)

 

Optimization Passes: after the top 8 suites are selected, it is possible to further refine them by running an optimization process that works as follows:

1.For each record in the suite, an attempt is made to replace this record with another record from the original pool of records with a different scale factor.

2.The optimization process often finds the best possible optimal solution or gets very close. It is also possible to make it do multiple passes to make sure it does find the optimal solution though that is usually unnecessary.

3.A maximum of 10 optimization passes can be selected.

 

Users have the option to keep previous top suites, and use them as candidates for the new selection.

Number of Records

Specify Number of Records per Suite

 

Number of records per suite: specify the number of desired records in the suite; check code requirements in GM Suite Selection & Scaling section. 

Maximum records from same Event: specify maximum number of unique records; specify how many times a record can be repeated from an event

Maximum records from same Station: specify maximum number of unique records; specify how many times a record can be repeated from an station

Minimum number of unique records: Set the minimum desired number of unique records.

 

Users may select the desirable number from the drop down list or directly type the number in the box.

Number of Pulse Records

Specify desired number of pulses in the suite (and their periods)

Control how many of the records are actually pulse records along with their periods. Up to 4 constraints can be specified.

Suite Average Parameters

Users may set acceptable factors for average suite magnitude, distance and duration (or frequency). The selected suites will be selected such that their average magnitude, distance and duration will fall within the defined range.

Run

Run the suite selection search and explore the results

Press the "Run" button to start the GM Selection process.

Once the solution suites are returned, users may click on any of the selected suites to view its generated records, as well as plots of all the records' spectra and response histories.

 

Figure: Ground Motion Selection dialog after the suite selection search is completed

 

Figure: Ground Motion Selection with three Target Spectra and different Target Types (and weights)

 

 

 

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