Seismic Complete Quadratic Combination Force Summations
Introduction
You may have seen that the Dynamic Response force summations don’t match the Combined force summations in a seismic analysis. In this post I will describe why that is and show you how to replicate this in your own analyses.
If we look…
Time History Analysis
Greetings,
As understand from the SACS Help manual, while running time history analysis, one can define 3 time history function in one file.
I have few questions on this analysis as below,
1) How to decide the Directionality Factors? As per help…
AMOD
Hello, everyone! When talking about allowable stress, Safety Factor is introduced. While in offshore engineering, there are allowable stress modifier in API and material factor in NPD. So what is the difference between safety factor and allowable stress…
RE: spectral analysis with dynamic response module
SACS uses SRSS to combine modal responses to spectral loading. Refer to Section 3.1.3 of the Dynamic Response manual for more information.
RE: foundation superelements for various purposes
The pair of forces are for the X and Y components of the pilehead stiffness as they are calculated independently. Refer to section 2.5.1 of the PSI manual.
You want to linearize the piles using the loading that will be closest to the actual loading…
Seismic Response Spectrum - Equivalent Static Load
Dear Sir,
I am curious about Equivalent Static Loads generated from Dynamic Response Module when we used ' Response Spectrum ' Approach.
Theoretically, for modal response, internal member force and moment for each mode will be combined by CQC or SRSS…