Signed Column Reactions for Combined Footing Design in Response Spectrum Analysis


Authors : Rahul Leslie

Volume/Issue : Volume 7 - 2022, Issue 5 - May

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3BbnueI

DOI : https://doi.org/10.5281/zenodo.6888843

The loss of sign in the output results of Response Spectrum Method has been a subject of discussion in literature, highlighting the issues caused, manifesting primarily in: (i) the loss of relative signs of forces acting on the structural members and (ii) the loss of relative signs of the support reactions. The method of Dominant Mode Signage (DMS) had been presented as a remedy in some of the structural analysis packages to tackle the issue. The intention of this paper is to elaborate an alternate manual method of applying signs to the support reactions for those using structural analysis packages not yet equipped with the DMS facility, presenting an easy step-by-step process fit for utilising on a day-to-day basis. It also demonstrates why a plot of the envelope of maximum footing pressures on soil on the footing is not symmetric in case of the Response Spectrum Method approach, even for a symmetric building with symmetric loading and supported on a symmetric combined footing, while it is rendered symmetric for the Seismic Coefficient Method approach (ie., the Static method), and as demonstrated, for the proposed method too.

Keywords : Response Spectrum Method, support reactions, loss of sign.

CALL FOR PAPERS


Paper Submission Last Date
31 - December - 2022

Paper Review Notification
In 1-2 Days

Paper Publishing
In 2-3 Days

Video Explanation for Published paper

Never miss an update from Papermashup

Get notified about the latest tutorials and downloads.

Subscribe by Email

Get alerts directly into your inbox after each post and stay updated.
Subscribe
OR

Subscribe by RSS

Add our RSS to your feedreader to get regular updates from us.
Subscribe