Quote: OMF in low seismic area will be more economic than IMF or SMF??
cost comparison for OMRF to IMRF or IMRF to SMRF will not slightly different, some references says is less than 5% for building with storey greater than 10. not in case of OMRF to SMRF.
the source for additional cost are from,
above are for IMRF to SMRF, required additional point compared to OMRF for minimum main bars reinforcement.
Quote:and the latest one the 2010 is in many place is significantly different
for seismicity region maps: of course yes it's a difference, but as i says not slighty comparing to significantly in peak ground acceleration from previous to present and next change in codes. but maps still look similar, only have minor changes, again not in case of PGA.
Quote:less risk can be change into medium risk
you says about SNI there's contains 6 class categories, which class, how significantly up? one, two, three, four, or five grades change? when you says less is mean 6 and medium is mean 3 or 4, so grades change up to 3? i'll look back where's.
Quote:material consumption is not money or cost
money or cost are relative, not as absolute in material consumption. example is in castellated and prestressed. less material consumptions but required additional cost for construction due to equipment/technology. so when the engineers talk about economics i believe is about efficiencies in less material consumptions, not only about money.