Here is a real-time demo where I use #OpenSees to compute the 5%-damped elastic response spectrum for the Loma Prieta Saratoga-Aloha Ave record. The top charts show the input ground motions, on the left, and the displacement response of all the systems, on the right. In the bottom figure you can watch the actual models in 2D (the response is 1D only, horizontal), starting with the most flexible on the left and stiffer systems as you head right. You can see the SDOF systems with different periods respond differently to the same excitation. This video is part of a course I am developing for Silvia Mazzoni's Brainery @ courses.silviasbrainery.com

Here is a real-time demo where I use #OpenSees to compute the 5%-damped elastic response spectrum for the Loma Prieta Saratoga-Aloha Ave record. The two top-left charts show the input acceleration in the horizonal X and Z directions. In the two top-right chart you see the displacment response of the different SDOFs. In the bottom figure you can watch the actual model in the in-plane X-Z respones. You can see the SDOF systems with different periods respond differently to the same excitation. This video is part of a course I am developing for Silvia Mazzoni's Brainery @ courses.silviasbrainery.com

Here is a simple animation I did in #OpenSees where I compare the response of 5 different buildings of different heights to an earthquake excitation. All the floors have the same stiffness and strength. Don't forget to learn more about OpenSees and EQ Engineering at: courses.silviasbrainery.com

Here is a fun visual of the response of SDOFs of a spectrum of periods (0.01-10sec) to a ground motion in 2D. An Elastic and a Bilinear System are compared next to each other. The model was built and analyzed using eSEES, which powers #OpenSees. I'll post a video of how I developed the input later. https://www.silviasbrainery.com/