Thank you for your interesting replies!
The integrity of structure is assured by the ductile yielding of steel and stronger/weaker compontents of course and is needed when you adopt reduced design earthquake forces due to inelastic response of your structure. Indeed less than forces due to...
Thank you all for interesting responses.
Yes I know the codes prescribe minimum requirement but never part of ACI 318 specify this. As usual on site, the Engineer wants to see justifications to "shortcut" the ACI. I'd like to find a comment in the ACI as well as ones in eurocode previously...
for JAE,
in Eurocode8 1998-1:2003 "Design of structures for earthquake resistance -
Part 1: General rules, seismic actions and rules for buildings"
2.2 Compliance Criteria
2.2.2 Ultimate Limite State
......
(2) As a limiting case, for the design of
structures classified as...
Thank you Gentlmen!
you are right in buildings... but what do you think in case of underground structures like metro-station or hydro powerhouse? I'm designining a shaft-powerhouse and is virtually impossible to obtain the right ductility from the beams and slabs and theretoo the structural...
Hello all!
I'm designing a structure in seismic zone disregarding the provisions of 21 Chapter of ACI 318-08 because I'm using the Elastic Response-Spectrum to evaluate the seismic forces. So I don't need to assign a seismic design category to the structure (SDC). My structure won't go in...
Ok Thank you JAE,
I understood the load factor take into account the variability in load effects only.
The strength-reduction factors (resistance factors) take into account the variability in resistance. Is there some changing in variability due to slower strength rate?
Now, Should I change...
Hello all!
Due to temperature problem we need to work with Low-Heat (LH) cement but is impossible to obtain the needed 28-days concrete resistance. For this reason we are re-designing with 90-days concrete resistance. But, what about the Load Factor in ACI 318? This load factors are calibrated...
