Comparison between Webshaker and 2DOF Model using Earthquake-like Records Input
About this Experiment:
This experiment compares data from the live Webshaker experiment to the result of the Two Degree of Freedom (2DOF) using Modal analysis to solve for the response of the 2-story shear frame.
The values for the 2DOF model: Natural Frequency f1, Natural Frequency f2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22 are initial with default values. However, users can adjust these values to achieve a better match with the data from the Webshaker experiment.
The experiment uses earthquake-like records as base motion to the test structure during the experiment and hence simulates a real earthquake. This experiment allows users to see how a structure would respond to real earthquakes. The input motions delivered to the test structure are scaled and shortened versions of the earthquake records. The acceleration data in an earthquake-like record is converted to a voltage signal which is sent to the shake-table delivering the base motion to the test-structure.
Please note that the result is only a rough experiment of how the test structure would respond to a real earthquake and cannot be used as an accurate prediction model.
Click here for a detail explanation of inputs for 2DOF program.
The values for the 2DOF model: Natural Frequency f1, Natural Frequency f2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22 are initial with default values. However, users can adjust these values to achieve a better match with the data from the Webshaker experiment.
The experiment uses earthquake-like records as base motion to the test structure during the experiment and hence simulates a real earthquake. This experiment allows users to see how a structure would respond to real earthquakes. The input motions delivered to the test structure are scaled and shortened versions of the earthquake records. The acceleration data in an earthquake-like record is converted to a voltage signal which is sent to the shake-table delivering the base motion to the test-structure.
Please note that the result is only a rough experiment of how the test structure would respond to a real earthquake and cannot be used as an accurate prediction model.
Click here for a detail explanation of inputs for 2DOF program.
Instructions:
To construct a simulation for the 2DOF model, enter values for the Natural Frequency f1, Natural Frequency f2, Modal Damping Ratio ζ1, Modal Damping Ratio ζ2, and Mode Shape Ø11, Ø12, Ø21, Ø22. To input for the live Webshaker experiment, choose one of the earthquake-like records listed in the pull down menu below as base excitation for your Webshaker experiment and then click "Select" button.
