In this video, you will learn how to create a linear model that has the same initial stiffness as the nonlinear model. This step is important for evaluating the level of nonlinearity in the nonlinear model. By comparing the seismic results from both models, you can the effect of stiffness degradation on the overall response of the structure. This video also includes an example that demonstrates both methods, allowing for a detailed comparison. Lastly, the flexural stiffness of the members is adjusted using the ETABS stiffness modifiers to match that of the nonlinear model.
0:00 General Clarification Regarding the Stiffnesses of Members
2:10 Example (NLRHA Vs. LRSA un-crack)
3:59 Changing Stiffness Modifiers of Columns
5:00 Changing Stiffness Modifiers of Slab
5:48 Changing Stiffness Modifiers of Shear Wall
6:55 Changing Stiffness Modifiers of Coupling Beam
7:35 Importing the Response Spectra
8:32 Assigning gravity Loads
You can access and download the Excel sheets by clicking on the link below:
drive.google.com/drive/folder...