Polar

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Polar

The Polar Chart allows the user to plot the bidirectional interaction trace and response envelope of the ground motion. The response is calculated for a particular period of vibration (T) and damping using a two-degree-of-freedom (2DOF) bidirectional system.

The example does not show sufficient difference between the symmetric and non-symmetric cases. Use a different example.

Chart

Show/hide chart general features:

Legend: show/hide the chart series legend

Records: show/hide individual records (components & triplets)

X Log: switch the X-axis scale between Linear and Logarithmic

Y Log: switch the Y-axis scale between Linear and Logarithmic

X Grid: show/hide grids on the X coordinates (parallel to Y-axis)

Y Grid: show/hide grids on the Y coordinates (parallel to X-axis)

Norm X-Axis: switch the X-axis normalization on/off (normalizes X-axis such that maximum value is 1.0)

Norm Y-Axis: switch the Y-axis normalization on/off (normalizes Y-axis such that maximum value is 1.0)

Freeze X-Axis: freeze X-axis scale to its current range (min,max)

Freeze X-Axis: freeze Y-axis scale to its current range (min,max)

Polar

2D Trace: Show the 2D Bidirectional trace of Displacement, Velocity or Acceleration response at a given period, T1, and damping

Max Angle: show/hide the Maximum-Response Directions.

Min Angle: show/hide the Minimum-Response Directions.

Polar Envelope: Show the Polar Bidirectional Envelope of the trace.

Show Rot100, Rot50 and Rot0, SRSS, Geomean, and Max(H1,H2) Envelopes

Polar (Expert)

Symmetric: Response along angles alpha and alpha+180 degrees is taken as the maximum of the two values.

Type: Response Type: Acceleration, Velocity or Displacement

T2/T1: Ratio used to define the period of vibration in Direction. The default value for T2/T1 is 1.

Modification

For modified records, show/hide the following:

Original: display the original record (before modification)

Modified: display the modified record (after modification)

Line Wt (Mod): display the modified chart with a heavier line thickness

Copy Data

Users may select the output chart of interest and have the ability to perform the following:

Copy Metadata, copies the record view record data, including header and footers of the data, which makes it easy to create record tables in MS Excel or Word.

Copy Chart Data, copies the chart series data which can be exported to create tables in MS Excel or Word.

Copy Chart Image, take a screenshot of the selected chart

Figure: Symmetric Polar Chart of 65010 record along with Polar Envelope, maximum and minimum angles

Figure: Asymmetric Polar Chart of 65010 record along with Polar Envelope, maximum and minimum angles