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International Journal of Emerging Technology and Advanced Engineering
Website: (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 5, Issue 12, December 2015)
4. More the displacement flexible is the structure and
vice versa. Therefore model type 3 is more stiff as
compared to other models.
5. For G+7 building with diaphragm discontinuity modal
mass participation is almost same for all models.
Therefore diaphragm discontinuity does not have
much effect on modal mass participation
Fig 16 Modal Mass Participation comparison for the six considered
G+7 storey models in Y direction
It is observed that when considering modal mass
participation in X direction, the participation is zero for all
types in 1st and 2nd mode and in 3rd mode it is less in Type 3
when compared with other Types. On the other hand the
modal mass participation is zero for all types in 2 nd and 3rd
mode and it is almost same for all types in 1 st mode.
Diaphragm discontinuity does not have much effect on
modal mass participation.
From the linear static analysis of G+7 storey building
with plan irregularity following conclusions can be made
1. The behaviour of building is better when diaphragm
discontinuity is closer to the centre of the building.
2. Frequency is directly proportional to the stiffness of
building. Therefore model type 3 is more stiff than
other model considered.
3. More the base shear stiff the building since member
will attract more forces. Model type 3 is more stiff
than other models considered
Indian Standard code IS 18932-2002
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