Abstract
Predicting the dynamic response of pedestrian structures such as building floors and footbridges to human-induced activity is a complex problem that involves estimation of the dynamic properties of the structure and estimating its response to a loading that varies in intensity and location with respect to time. Even though the problem is complex, researchers have developed guides to aid designers in avoiding vibration serviceability issues by providing simple analytical tools for evaluating a proposed design. The strength of these guides lies in prevention of serviceability problems at the design stage, although they also serve as an informative measure when in-service floors or pedestrian bridges are reported to have excessive vibrations.
Current methods of on-site serviceability evaluation typically involve heel-drop tests to determine natural frequencies and walking tests to record sinusoidal peak acceleration response, generally as response-only single channel measurements. A general understanding of the floor response is achieved this way by looking at the resulting acceleration traces and autospectra resulting from these unmeasured excitations. The most accurate method for estimating the dynamic properties of a structure is experimental modal testing to acquire accelerance frequency response functions (FRF).
This paper proposes a method for evaluation of vibration serviceability using the mid-bay/span driving point accelerance FRFs of low-frequency (<9 Hz) pedestrian structures derived from experimental modal testing. The method proposes using an accelerance limit curve generated from a contemporary design guide to represent a tolerance limit of vibration serviceability. On-site evaluation can be performed with modal testing by comparing the peaks of a measured accelerance FRF with the accelerance limit curve. The method is demonstrated using a set of mid-bay driving point accelerance FRF measurements from an in-situ building floor and comparing with a widely recognized design guide-based accelerance limit curve.
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References
Murray, T.M., Allen, D.E., Ungar, E.E., Davis, B.: Steel Design Guide Series 11: Vibrations of Steel-Framed Structures Due to Human Activity. American Institute of Steel Construction (AISC), Chicago, Illinois (2016)
Davis, B., Liu, D., Murray, T.M.: Simplified experimental evaluation of floors subjected to walking-induced vibration. J. Perform. Constr. Facil. 28, 04014023 (2014). doi:10.1061/(ASCE)CF.1943-5509.0000471. ASCE
Barrett, A.R.: Dynamic testing of in-situ composite floors and evaluation of vibration serviceability using the finite element method. Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Blacksburg, VA (2006)
Davis, D.B.: Finite element modeling for prediction of low-frequency floor vibrations due to walking. Ph.D. Dissertation, Virginia Polytechnic Institute and State University, Blacksburg, VA (2008)
Davis, D.B., Murray, T.M.: Simplified finite element method for predicting low-frequency floor vibration due to walking. In: Proceedings of the 2010 North American National Steel Construction Conference. American Institute of Steel Construction, Chicago, IL (2010)
Davis, B., Barrett, A.R., Murray, T.M.: Use of a force plate versus armature accelerometer for measuring frequency response functions. Exp. Tech. 35, 73–79 (2011)
Blakeborough, A., Williams, M.S.: Measurement of floor vibrations using a heel drop test. Proc. Inst. Civ. Eng. Struct. Build. 156, 367–371 (2003)
Hanagan, L.M., Raebel, C.H., Trethewey, M.W.: Dynamic measurements of in-place steel floors to assess vibration performance. J. Perform. Constr. Facil. 17(3), 126–135 (2003). ASCE
Barrett, A.R., Murray, T.M.: Dynamic testing and behavior of in-situ composite office floors. In: Experimental Vibration Analysis for Civil Engineering Structures 2011, vol. I, Varenna, Italy, pp. 347–355, 3–5 October 2011
Pabian, S., Thomas, A., Davis, B., Murray, T.M.: Investigation of floor vibration evaluation criteria using an extensive database of floors. In: Proceedings of the ASCE Structures Congress, pp. 2478–2486. ASCE, Reston (2013)
Smith, A.L., Hicks, S.J., Devine, P.J.: Design of Floors for Vibration: A New Approach, SCI P354. The Steel Construction Institute, Silwood Park, Ascot, Berkshire, England (2007)
RFCS: Human Induced Vibrations of Steel Structures, Vibration Design of Floors, Guideline. European Commission Research Fund for Coal and Steel, Brussels, Belgium (2007)
Willford, M., Young, P.: CCIP-016: A Design Guide for Footfall Induced Vibration of Structures. The Concrete Centre, Surrey, United Kingdom (2006)
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Barrett, A.R., Bradley Davis, D., Murray, T.M. (2018). Evaluating Vibration Serviceability Using Experimental Modal Testing. In: Conte, J., Astroza, R., Benzoni, G., Feltrin, G., Loh, K., Moaveni, B. (eds) Experimental Vibration Analysis for Civil Structures. EVACES 2017. Lecture Notes in Civil Engineering , vol 5. Springer, Cham. https://doi.org/10.1007/978-3-319-67443-8_10
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DOI: https://doi.org/10.1007/978-3-319-67443-8_10
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