In the context of dynamic analysis of structures, select the correct statement from the following.
(Here, ‘SDOF’ stands for Single Degree Of Freedom, whereas ‘MDOF’ stands for Multi-Degree Of Freedom.)
1
Both single-storey and multi-storey structures are modelled as an MDOF system.
2
A single-storey structure is modelled as an MDOF system and a multi-storey building as an SDOF system.
3
Both single-storey and multi-storey structures are modelled as an SDOF system.
4
A single-storey structure is modelled as an SDOF system and a multi-storey building as an MDOF system.