Dear all!!
According to ASME B31.1,section 104.8.2, when calculating stresses due to earthquake "only one half the earthquake moment range" must be used. What does it mean? To use only one half of the seismic load? Or does it refer to the fact that the earthquake is a cycling load, so it produces moments, i.e, from -30 to +30 and designer must use 30? Or the designer should use, when calculating stresses, one half of the moment, that is to say 30/2 = 15?
When entering seismic load in CAESAR, must it be the full load or one half of it?
As you see I find that paragraph very confusing.
Best regards and thanks in advance
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Carletes