Cervenka Consulting Forums — Load case and Monitoring issue

Re: Load case and Monitoring issue

2010-05-24T16:48:02Z

Thank you so much, Mr. Dobromil!

Re: Load case and Monitoring issue

2010-05-24T13:59:58Z

I am not sure if I understand question (1) - the loads are incremental in ATENA. Zero (0) increment means the force/load from the previous step remains unchanged.

(2) At support, only reactions are nonzero = to be monitored. At points loaded with forces, external forces are to be monitored.

I assume you have a supported bottom surface with many nodes. In such case, you need to monitor the reactions in all nodes and sum the values outside of ATENA (preferably using a spreadsheed) to get the total reaction. To make your life easier, you can add an elastic, relatively stiff "support plate" to the bottom. Then, you support the plate in a only a few points and monitor the reactions in 1-5 points which is much less work to sum compared to the values from all finite element nodes at the bottom of the wall.

Regards,
Dobromil

Load case and Monitoring issue

2010-05-24T09:17:13Z

Dear Sir,

Recently I am proposing to use ATENA 3D to conduct an analysis which is similar to pushover analysis on a single shear wall, thus, please help me figure out the questions listed below, thank you!
(1). Can I apply constant vertical load on the shear wall, rather than the iterative load case? And how?
(2). It is desirable to produce a curve expressed as base shear versus top displacement, so that the capacity of the structure can be monitored. And I know this can be done by setting monitoring points on the specific positions on the structures. However, I was still confused how to monitor the base shear? What options should I choose, external force or reactions? And your suggested position of the monitoring point?

ATENA is very powerful in modelling concrete structures! I wish your company will continue to improve it!

Thank you very much!

Best wishes,
Jacky