No...The Result differs from SAP.I know something's wrong with {fg}. I didn't find anything in Structural Dynamics books. most of them use modal analysis to this kind of analysis. [sad]
Hi,
Consider a 2D frame like below which excited by el Centro earthquake:
I'm Using Direct Time Integration To obtain response of structure. I verified my program with SAP200 when a Harmonic load applied in node2 and results are the same. but in this case, i.e. base excitation, i have a...