Protecting Buildings from Earthquakes. ~100-ton class TMD case study~.
This is an example of a TMD for building earthquake countermeasures: a TMD is a vibration control device installed on the roof of a building, which leads to more effective use of occupied space compared to measures such as installing vibration control dampers on the structure.
issue
In a new construction plan for an office building (10F, steel frame), measures were being considered to prevent building damage in the event of a Level 2 (large scale earthquake).
In these cases, vibration-damping components such as oil dampers are sometimes used, but the following can be problematic
- More units installed will increase costs.
- Space is divided and cannot be used effectively
- Vibration control components are often installed inside walls, making access and maintenance of equipment difficult
In this case, the plan was to install the TMD on the rooftop, which allows for a wide and effective use of the building's interior space. In addition, the equipment can be easily maintained.
counter-measure
Yacmo designed, manufactured, and installed the TMD with the specifications shown in the figure below.
result
The results of the seismic response analysis for level 2 earthquake motion are shown in the figure below.
It was confirmed that TMD significantly reduces the interlaminar deformation angle and maximum acceleration. The TMD is expected to reduce seismic shaking and quickly control post-quake shaking.
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)