Avoid vibration problems caused by multiple people exercising in a fitness studio!
Vibrations caused by the movement of many people in a dance or fitness studio can be transmitted to the floors above and below, causing problems. Yacmo's vibration control system, TMD, reduces swaying to create a comfortable environment without transmitting unpleasant vibrations to the floors above and below.
issue
In dance studios and gyms (studio lessons), large numbers of people move and jump around to the rhythm of the music, which tends to generate large vibrations. This vibration can be transmitted not only to the floor where the exercise is taking place, but also to the floors above and below, which can be problematic.
A commercial facility was planned to have a restaurant on the second floor and a gym on the third floor. At the planning stage, there was concern that when lessons were held in the gymnasium studio, vibrations would be transmitted to the restaurant on the lower floor, which would deteriorate the living environment.
counter-measure
After preliminary study, it was decided to install two 300 kg TMDs on the floor of the second floor restaurant, where vibration was a concern, because the floor of the third floor studio was rigid and there were no problems caused by shaking. (Figure 1, Figure 2, Table 1)
Figure 1.
Figure 2: TMD exterior (left) and installation (right)
Table 1: TMD basic specifications
The natural frequency was measured at the center of the span of the second floor and was found to be 12.2 Hz, so the TMD frequency was adjusted accordingly. (Figure 3)
Figure 3: Measurement results of response vibration acceleration when heel excitation is applied.
result
Based on the results of one person's continuous jump excitation on the third floor and the response acceleration measured on the second floor, the vibration generated during the vertical nori motion of 10 people was estimated and evaluated using the occupant performance evaluation curve of the Architectural Institute of Japan.
Without any measures taken by TMD, the vibration is above V-70, but with vibration control measures, it is around V-50. This is the “not very bothersome” level in the evaluation of the new standard (AIJES-V0001-2018 Occupant Performance Evaluation Standard for Building Vibration), which means that an appropriate vibration environment is ensured even during fitness-for-service operations.
Figure 4: Effects of TMD Estimated second-floor floor vibration acceleration during 10-person vertical glue excitation on the third floor.
Related Pages
- added. This report compares AMD (Active Mass Damper) and TMD (Tuned Mass Damper), which are commonly used as vibration countermeasures for building floors, in terms of features, cost, and ease of maintenance. Please use this report when considering vibration countermeasures.
- Product Information TMD (Tuned Mass Damper)