04/05/2020
In this post, I am not asking to reduce the R factor for structural systems, I am discussing why to completely eradicate R and move on to a different method of structural analysis. It is not that our current approaches are bogus, but they are definitely lacking when we talk about achieving seismic reliability. This typically happens when we try to dumb down the complexity of structural dynamics into simple mathematical functions, that try to represent realistic conditions. This worked great when we didn't have resources at hand. That is why there is a probability of collapse associated with any seismic event.
But with the advancement in technology, I think we can deal with more reliable seismic analysis, even if it is complicated. Because that will help us in achieving the "confidence factor" in building design which will in turn help and reduce the probability of collapse without significantly impacting the cost of structures. I think it is high time when we think about displacement-based design coupled with resiliency, capacity-based approach, and element-based ductility.
Jinal Doshi, P.E.- Project Manager at DCI Engineers, USA Seismic design of structures is seen as one of the most challenging parts of structural engineering. It may not seem as difficult once you start learning, or even if you have practiced it for some years. It may just appear to be some simple ma...
