Requests

The building has become dilapidated and reinforcement work is to be carried out to check the effects.
The natural frequency of the building at the present time is to be ascertained in advance and compared with the natural frequency after reinforcement.

Analysis details

An exciter was brought in to measure vibration modes and natural frequencies of the floors, mainly in the main part of each floor and on the roof.
The modes and natural frequencies were compared before and after reinforcement to verify the effectiveness of the reinforcement.