minimising floor vibrations
TRANSCRIPT
CANADA i CHiNA i HONG KONG i iNDiA i SiNGAPORE i uK i uSA www.RwDi.COm
StAtEmENt Of quAlifiCAtiONS
Minimising Floor Vibrations
RWDI’s skilled team of consultants and technicians have used
advanced technology and methodologies to successfully
complete floor vibration projects throughout the world
ranging from nanotechnology to human comfort applications.
Starting Early in the Design Process has Many BenefitsDesign teams have learned that RWDI’s services can be of
particular advantage when engaged early in the master planning or
conceptual design stage of a large building or structural project.
By identifying potential floor vibration problems early in the master
planning or conceptual design stages, this allows for corrective
action that saves time and money. RWDI’s services include
consulting, design reviews, performance analysis, field monitoring
and measurement, and solution design and implementation.
Consultation & Assessment As part of your design team, we consult with you on
floor vibration solutions:
� Assess levels of vibration using methods ranging
from AISC / CISC / SCI design guidelines to
advanced finite element modeling.
� Simulate footfall performance and crowd dynamics.
� Survey sites and existing structures using portable
vibration data-acquisition equipment.
� Design mitigation solutions.
RWDI’s specialized knowledge, capabilities, practices
and advanced technical resources are used to deliver
useful and understandable reports. The firm’s
recommendations can lead directly and effectively to the
implementation of the best floor vibration solutions.
Finite element modeling Design mitigation solutionsAcceleration contour Full scale motion simulation
CANADA i CHiNA i HONG KONG i iNDiA i SiNGAPORE i uK i uSA www.RwDi.COm
StAtEmENt Of quAlifiCAtiONS
Floor Vibration Mapping
The design of high performance laboratories requires
that structural systems must achieve increasingly
stringent vibration criteria for specialized equipment.
Today’s commonly used simple single-bay model
soften lead to approximate results, which may not
allow the full potential of the equipment to be reached
and can be overly conservative in terms of the design
of the structural system. Alternatively, for most
applications, a three-dimensional structural finite
element model of the floor can be developed in order
to characterize its complex response more accurately.
RWDI’s advanced footfall vibration analysis
has been developed to predict a floor system’s
vibration frequencies and amplitudes and will
result in an improved design that will reduce
the likelihood of requiring future retrofits.
Once the model has been used to generate the dynamic
properties of the structural system, floor motions from
occupant traffic are predicted using methodologies
published by the Steel Construction Institute (SCI)
and Concrete Centre, which consider critical walking
speeds and a full range of possible walking paths
evaluated simultaneously, unlike conventional single-
bay models. Predicted vibration amplitudes are mapped
on to proposed flooring layouts and compared to the
applicable vibration design criteria for the space.
Use of this method allows for greater accuracy
on the prediction of vibration responses for
the flooring system; graphical representation
of the vibration responses; and optimization of
the equipment or room layout to exploit are as
identified as having lower vibration responses,
resulting in a better functioning space.
� Predict a floor system’s vibration frequencies and amplitudes
� Greater accuracy on the prediction of vibration responses
� Improved design that will reduce the likelihood of requiring future retrofits
A Customized, Accurate Approach to Vibration Control Design