Masses of stores (floors)

[sanya greek]

Hello!

I have done pushover analysis on my building and now i want to transform the curve of target displacement into ADRS.
For that i need:
masses of each store (floor).
eigenvalue of building.

What i mast to do?
I did eigenvalue analysis for this building, but i see only nodal displacements and nodal masses. Can i see in programm the necessary data grouped by stores?

If no, is it possible to take the center of mass on each floor?

Thank you so much!

[huffte]

Once a static pushover analysis has been completed and you go to the post-processor, you should immediately see a number of results tabs, the second of which is "Eigenvalue Results".

The "Eigenvalue Results" tab has two sub-tabs - "Modal Periods and Frequencies" and "Nodal Masses".

Eigenvalues (square of circular frequencies) are readily available on the "Modal Periods and Frequencies" sub-tab.

If you strategically name nodes according to floor then you can easily copy and paste from "Nodal Masses" sub-tab into Excel and sum the masses in each direction at each floor.

I hope this helps get you going, sanya greek.

[sanya greek]

Thank you Tim Huff!

One more question:

Yesterday when I was looking for masses, i did the following. In Pre-Processor i selected Eigenvalue Analysis and made analysis. After i saw nodal masses and took them for my analysis by exel. All that i did with the loads on each element (in Applied Loads i put the forces by element loads).

Later i did the same without element loads and take the same masses and periods!!! So i understood that in my Eigenvalue analysis the forces didn't take into account.

What i mast to do?

Thank you so much!!!

[z.gronti]

Dear sanya greek,

As it is written in the "Loading" section of chapter "Quick Start" of SeismoStruct's User Manual: "Eigenvalue analysis. Self-weight of the structure is considered. No loading is applied."