Geometry of Dome is always circular.
Dome is designed for self weight+any finishes load+ Maintenance LL
(and sometimes dust load).
Wind and EQ loads are also to be taken
The dome shell under gravity loading will be in compression.
A dome must be provided with properly designed Ring beam at its periphery
to take care of horizontal thrust.
Reinf in ring beam will be under direct tension and it must have a
lap length of (2*Ld ) at locations of lapping.
Towards junction with ring beam , additonal thickening of dome shell need to be
given with both face extra reinf there. Please see any standard text book and go thru the theory and formulas.
Verical load may be carried thru same ring beam by placing column
at regular interval or if columns are located on outer periphery of temple
provide beams arrangement to support ring beam. ring beam shall be
additionally designed for vertical loading between supports .
Source: www.sefindia.org
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