Discussion- Vibration and Deflection of Steel Bridges
Discussion- Vibration and Deflection of Steel Bridges

Discussion- Vibration and Deflection of Steel Bridges

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Vibration and Deflection of Steel Bridges

Text of Discussion- Vibration and Deflection of Steel Bridges

  • Vibration and Deflection of Steel Bridges Paper presented by RICHARD N. WRIGHT and WILLIAM H.

    WALKER (January 1972 issue)

    Discussion by THOMAS M. MURRAY

    I T IS suggested in the paper that the criterion for human response to bridge vibration be the Goldman curve for sustained motion and a modification for transient mo-tion. The purpose of this discussion is to point out the statistical inconsistencies used in the development of the Goldman curves and recommendation of a substitute curve.

    The curves were produced by Goldman from data of Best, Constant, Jacklin and Liddell, Reiher and Meister, von Bekesy, and Zand. Hanes1 has found that Goldman used a clearly unwarranted relative weighting of the various sets of data. He cites that at the threshold of perception, at frequencies of 1.5 and 2.0 Hz, the Reiher and Meister data (based on 15 subjects standing and reclining) were given five times the weight of the Jacklin and Liddell data (based on about 100 seated subjects) in determining the "average." Hanes further notes that at frequencies above 2.0 Hz, Jacklin and Liddell had no data, so this work was not involved in the average. How-ever, for the threshold of discomfort, Jacklin and Lid-dell's subjects provided all of the data for the average at 1.0 Hz. Hanes concludes " the Goldman curves are essen-tially meaningless."

    The set of curves presented by Reiher and Meister (see Ref. 2) and shown in Fig. 1 is the most frequently used criterion of human response to vertical structural movement. For transient vibration, the amplitude scale is multiplied by a factor of 10. Although Reiher and

    Thomas M. Murray is Assistant Professor, Department of Civil Engi-neering, University of Oklahoma, Norman, Oklahoma.

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    E N G I N E E R I N G J O U R N A L / A M E R I C A N I N S T I T U T E OF S T E E L C O N S T R U C T I O N

  • REFERENCES 1. Hanes, R. M. Human Sensitivity to Whole-Body Vibration

    in Urban Transportation Systems: A Literature Review, Johns Hopkins University, APL/JHU-TPR 004, May, 7970.

    2. Lenzen, K. H. Vibration of Steel Joist-Concrete Slab Floor Systems, Center for Research in Engineering Science, University of Kansas, 1966.

    3. Lenzen, K. H. and Murray, T. M. Vibration of Steel Beam-Concrete Slab Floor Systems, Center for Research in Engineering Science, University of Kansas, 1968.

    4. Polensek, A. Human Response to Vibration of Wood Floor Systems, Forest Products Research Laboratory Meeting, July, 7969.

    5. Human Sensitivity to Vibration in Buildings, RF No. 12, Commonwealth Experimental Building Station, Sydney, Australia, May, 1966.

    6. Pool, T. W. and Murray, T. M. Human Response to Struc-ture-Borne Vibrations: A Literature Review, University of Oklahoma Research Institute, April, 1972.

    1 10 100

    FREQUENCY-CYCLES PER SECOND

    Fig. 1. Domains of various strengths of sensations for standing persons subject to vertical vibration, adjusted for transient vibrations

    {after Reiher and Meister)

    Meister curves were developed using a limited number of subjects, the modified curves have been investigated on a number of different types of building floor systems by different researchers: Lenzen,2 steel joint-concrete slab systems; Lenzen and Murray,3 steel beam-concrete slab systems; Polensek4 wood joist systems; Common-wealth Experimental Building Station,5 various systems.

    Based on the above investigations and on extensive literature review on human response to structure-borne vibrations,6 this discusser recommends the use of the Reiher-Meister curves until a badly needed research program is undertaken to more accurately define human response to vibration.

    169

    O C T O B E R / 1 9 7 2

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    Welcome ScreenCopyright InformationEditorsTable of Contents19641st QuarterSteel Cable Creates Novel Structural Space SystemsZetlin, LevDiscussion

    Effective Column Length-Tier BuildingsHiggins, T.R.

    Lateral Support for Tier Building FramesGalambos, Theodore V.Discussion

    Simplifications in the Solution of Column Interaction ProblemsHooper, IraRapp, Robert E.

    End Plate Connections in Plastically Designed StructuresCoel, JosephLathrop, R.P.Onderdonk, A.B.

    Folded Steel Plate Roof for a Suburban Branch BankShogren, V.E.

    2nd QuarterFundamentals of Orthotropic Plate DesignAu, TungChang, Jerry C. L.

    AISC Orthotropic Plate Design ManualMilek, W.A.

    Wearing Surfaces for Orthotropic DecksGilligan, John A.

    The Poplar Street BridgeShields, E.J.

    Discussion: Steel Cable Creates Novel Structural Space SystemsGould, Phillip L.

    3rd QuarterCurvilinear Grid FramesHutton, Charles R.

    Stiffened Thin Shell DomesBuchert, Kenneth P.

    The Steel Framed DomeOdom, Gerald SStevens, David E.

    Research in Plastic Design of Multi-story FramesBeedle, Lynn S.Driscoll, George C., Jr.

    Wind Connections with Simple FramingDisque, Robert O.

    Castellated Beams - New DevelopmentsBoyer, J.P.

    4th QuarterSteel is Changing the Los Angeles SkylineJohnston, Roy G.

    On the Lateral Support of Inelastic ColumnsPincus, George

    Tests of Steel Moment ConnectionsBeedle, Lynn S.Christopher, Richard

    Space Frame StructuresNaslund, Kenneth C.

    The Bridge Delta Girder: Single-Webbed and Double-WebbedHadley, Homer M.

    Old Bridges Give Clues to Steel Deck PerformanceWolchuk, Roman

    Discussion: Lateral Support for Tier Building FramesHooper, Ira

    19651st QuarterBending Under Seated ConnectionsAbolitz, A. LeonWarner, Marvin

    Effective Length of Columns in Gable FramesLu, Le-Wu

    Live Load Deflections in a Prestressed Steel Beam BridgeWelden, Neil

    Lessons from Crane RunwaysMueller, John E.DiscussionDiscussion

    Strength of Three New Types of Composite BeamsToprac, A.A.

    One Engineer's Opinion (Bolting and Composite)Milek, W.A.

    2nd QuarterSplices in Plastically Designed Continuous StructuresHart, Willard H.Milek, W.A.

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    Design Charts for Bolts with Combined Shear and TensionHagen, Hans WilliamPenkul, Richard C.

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    Discussion: Lessons from Crane RunwaysSaxe, Van Rensselaer P.

    3rd QuarterShell Shapes Framed in SteelGeiger, David H.

    Plastic Design of a Three-Story Steel FrameDe Buen, Oscar

    Plastic Design of Multi-Story Buildings-A Progress ReportDriscoll, George C., Jr.Yura, Joseph A.

    Method of Combining Mechanisms in Plastic AnalysisPincus, George

    Considerations in the Design of Large-Size Welded Tubular Truss JointsBouwkamp, J.G.

    Framing Connections for Square and Rectangular Structural TubingWhite, Richard N.

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    Torsion in Closed SectionsSiev, Avinadav

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    Column Stability in Type 2 ConstructionDe Falco, FredMarino, Frank J.Errata

    Design of Bolts or Rivets Subject to Combined Shear and TensionZweig, AlfredErrataDiscussionErrata

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    Testing of a Model Curved Steel Girder BridgeClarke, C. Bernard

    Small Scale Models for Steel FrameworksLitle, William A

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    Vibration of Steel Joist-Concrete Slab FloorsLenzen, Kenneth H.

    Errata: Design of Bolts or Rivets Subject to Combined Shear and TensionZweig, Alfred

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