This example demonstrates the natural frequency of a five-storey building when subjected to free vibration and earthquake loading.
The building consists of 5 floors and a basement. It is 10 m wide and 17 m high including the basement. The total height from the ground level is 5 x 3 m = 15 m and the basement is 2 m deep. A value of 5 kN/m2 is taken as the weight of the floors and the walls. The building is constructed on a clay layer of 15 m depth underlayed by a deep sand layer. In the model, 25 m of the sand layer will be considered.
This exercise requires a PLAXIS 2D Ultimate license to access the Dynamics features.
The attached *.p2dxlog file contains all the commands to generate the model. With a Bentley Geotechnical SELECT Entitlement [GSE] licence, you can use the commands runner to open the *.p2dxlog file and to execute all commands in one go, see also this instruction.
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PLAXIS 2D Tutorial 14: Dynamic analysis of a generator on an elastic foundation [Tutorials]
PLAXIS 2D Tutorial 15: Pile driving [Tutorials]
PLAXIS 2D Tutorial 17: Thermal expansion of a navigable lock [Tutorials]
PLAXIS 3D Tutorial 09: Free vibration and earthquake analysis of a building [Tutorials]