Greetings all,
I have a question regarding seismic analysis of a bridge with module Earthquake RSA in SOFiSTiK 2025. I am using Newmark method for Directional combination ( EN 1998-1:2004,4.3.3.5.2), and it has come to my attention that parameter for combination (which is in my case set to 0.3) it is not correct. I am considering seismic effect in all three main direction (X,Y,Z) and for example for direction X, combination results are as follows: 1.0 Ex + 1.0 Ey + 0.3 Ez , which is inconsistent with chapter 4.3.3.5.2 in Eurocode. Is there any whey that i can manipulate with these parameters so i can get 1.0Ex + 0.3 Ey + 0.3 Ex?
Kind regards.