Ultra-thin size that can be hidden in the treads! Floor Mate helps damping design staircases!
This is an example of vibration control measures for staircases. With the ultra-thin TMD “Floor Mate”, we were able to provide vibration control without compromising the design of the staircase.
issue
Recently, you may have seen stylish steel staircases in buildings. In exchange for the slim appearance of these design staircases, vibration during walking is often a problem. Depending on the magnitude of the vibration, not only the person standing in the middle of the staircase, but also the person walking down the staircase may feel the shaking. When designing such stairs, it is a good idea to consider vibration control devices (such as TMDs). However, the appearance of the staircase can be spoiled if it is attached to something extra. Yacmo's Floor Mate is ultra-thin and can be installed completely concealed under the stair treads.
counter-measure
In this case study, four units of FloorMate (30 kg type) are installed. As shown in the photo, they are installed in a gap under the treadle plate and are not visible at all.
result
The following figure shows the measured results of FloorMate's effectiveness. The vibration acceleration generated at resonance was reduced from 43.1 cm/s2 to 13.9 cm/s2. This means that the feeling of the person walking on the floor has been improved from “clearly felt” to “slightly felt” level.
Since staircases are more like passageways than living spaces, the issue in evaluating vibration problems is whether or not the users (pedestrians) themselves are uncomfortable with staircase vibration. Therefore, we usually evaluate the vibration problem by applying the standard values of the pedestrian bridge design guidelines (orange dotted line) as shown below.
“Future Pedestrian Bridges p120 Chapter 4.25”: edited by Japan Steel Construction Association (Giho-do Publishing Co., Ltd.)”
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 Floor Mate