Vibration Control of a Grand Ballroom Floor System Using Tuned Mass Dampers
Floor vibration of a grand ballroom subject to crowd loading is mitigated using tuned mass dampers along with stiffening.
Read MorePosts Tagged with Floor Vibration Control
Vibration Control of Long Span Balcony in a Church Using Two Tuned Mass Dampers
Upon having the construction of a new church near completion, walking induced vibration was perceived on a long span balcony. DEICON conducted on-site measurements and identified the first two natural frequencies of the balcony. In addition, the participating mass and the damping ratio of mode 1 of the balcony was evaluated. Tuned damping was used […]
Read MoreVibration Control of an Office Building Floor System Using Tuned Mass Dampers
Walking induced vibration of composite floor system of an office building was controlled at 4 bays, using 8 x 1500 lb tuned mass dampers (TMDs). The measured natural frequencies of the floor system were used in tuning the TMDs targeting the first vibration mode of two bays and first two vibration modes of the other […]
Read MoreVibration Control of Operating Rooms’ Floor System in a Medical Center via Stiffening and Tuned Damping
Part of an existing building was converted to a medical center with a number of operating rooms. Vibration Measurement of the bare floor system (without any fit-out) pointed to the first natural frequencies of around 6 Hz for various bays. Floor Vibration Limits of Operating Rooms: ISO standard suggests that vibrations in operating rooms not […]
Read MoreBalcony Vibration Control Using Tuned Mass Dampers
The irregular shape of three large, 1200 square feet, cantilevered balconies in a high-profile performing arts center resulted in areas at the balcony tip and edge susceptible to potentially annoying levels of vibration. To mitigate this effect, the building designers added tuned mass dampers (TMDs) to the underside of each of the three balconies. Following […]
Read MoreVibration Control of a Pharmaceutical Laboratory Floor System Using Stiffening and Tuned Damping
Extensive vibration measurements and numerical analysis of the 2nd floor of a pharmaceutical laboratory floor system conducted by the acoustics consultant of the project revealed that the vibration levels at various bays were well above the laboratory vibration criteria. In coordination with the structural design team, contractor, and client, a two-phase retrofit scheme was proposed […]
Read MoreMulti-mode vibration Control of a Floor System Using Tuned Mass Dampers
The composite floor system of a large multipurpose room on the third floor of the admission building at a state university exhibited noticeable vibration caused by walking. The composite floor system consists of three long and narrow bays. The vibratory attributes of the floor system established by numerical analyses and measurement revealed the presence of […]
Read MoreVibration Control of a Medical Center Floor System Using the Combination of Stiffening and Tuned Damping
The vibration of an elevated floor system with long span trusses housing sensitive medical imaging equipment was mitigated using tuned damping in conjunction with stiffening of the floor framing and load spreading between adjacent bays. {With the very stringent criterion on vibration levels associated with the medical imaging floor systems neither stiffening (even by a […]
Read MoreVibration Control of a Concert Venue Floor System Using Tuned Mass Dampers
Tuned mass dampers (TMDs) were used to abate resonant vibration of the floor system induced by the rhythmic (dancing) perturbation at an upscale intimate concert venue/night club. The composite floor system is made up of 2.5” lightweight concrete on 3” deep, 20 gauge steel deck supported by wide flange steel beams and girder framing. The […]
Read MoreVibration Control of an Office Floor System Using Tuned Mass Dampers
Tuned mass dampers (TMDs) are tuned damping devices commonly used for dampening the vibration of a structure at a particular resonant frequency. TMDs come in various configurations. The commonality between all of them is their make-up which includes an inertia element (mass) suspended by an energy dissipating (damping) device and a restoring (resilient) element. Foot […]
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