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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>SAFETY AND RELIABILITY OF SUSPENSION BRIDGES</title>
      <link>https://trid.trb.org/View/100090</link>
      <description><![CDATA[THE AEROELASTIC RESPONSE OF LONG-SPAN SUSPENSION BRIDGES IS INDISPENSABLE IN A STRUCTURAL DESIGN IN WHICH THE VIBRATIONAL CHARACTERISTICS OF THE BRIDGE AND THE INDUCED AERODYNAMIC FORCES ARE INTERRELATED. FROM THE PURPOSE OF ITS AEROELASTIC DESIGN ONE CAN ASSUME A LINEAR RESPONSE OF THE STRUCTURE WHILE THE AERODYNAMIC FORCES MAY BE CONSIDERED LINEAR OR NON-LINEAR DEPENDING ON THEIR AEROELASTIC CHARACTERISTICS. THE AERODYNAMIC PROBLEMS ARE CLASSIFIED AS FOLLOWS: AEROELASTIC STABILITY PROBLEMS (COUPLED SELF-EXCITATION AND CLASSICAL FLUTTER); AEROELASTIC RESPONSE PROBLEMS (SELF-INDUCED OSCILLATION OF SINGLE DEGREE OF FREEDOM; STALL FLUTTER; GALLOPING, AEOLIAN OSCILLATION); FORCED RANDOM VIBRATION PROBLEMS (BUFFETING CONSIDERED AS A STATIONARY RANDOM PROCESS). BASED ON THE ABOVE CLASSIFICATION THE RELIABILITY OF THE STRUCTURAL DESIGN AGAINST WIND CAN BE ESTIMATED. THE RELIABILITY AGAINST EARTHQUAKE IS ANALYZED ON THE BASIS OF THE ASSUMPTION OF A NON-STATIONARY RANDOM PROCESS EARTHQUAKE MOTION AND DYNAMIC CHARACTERISTICS OF SUSPENSION BRIDGES AS ASSUMED IN PART 1. THE PROBABILITY OF FAILURE FOR A SINGLE OCCURRENCE OF THE EARTHQUAKE IS EVALUATED FIRST AND THE RELIABILITY OF THE STRUCTURE IS SUBSEQUENTLY ESTIMATED ON THE BASIS OF RETURN PERIOD OF THE SEISMIC INTENSITY AND THE SERVICE LIFE OF THE STRUCTURE. /AUTHOR/]]></description>
      <pubDate>Tue, 11 Dec 1973 00:00:00 GMT</pubDate>
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      <title>EARTHQUAKE EFFECTS ON THE SAFETY AND RELIABILITY ANALYSIS</title>
      <link>https://trid.trb.org/View/100088</link>
      <description><![CDATA[EARTHQUAKE EFFECTS ON THE SURFACE OF THE GROUND ARE EXTREMELY VARIED AND COMPLEX IN NATURE.  THEIR EFFECTS ON ENGINEERING STRUCTURES ARE OF THE SAME ORDER OF COMPLEXITY. STRUCTURES SUBJECT TO EARTHQUAKE EFFECTS WHICH LEND THEMSELVES TO STUDY BY MODEL ARE EXAMINED WITH RESPECT TO SAFETY AND RELIABILITY.  APPLICATION OF MODEL STUDY TO ACTUAL STRUCTURES, FOUNDATIONS, GROUND ACCELERATION WITHOUT PERMANENT RELATIVE GROUND DISTRIBUTION AND FAILURE CRITERIA ARE DISCUSSED.  A CRUCIAL QUESTION IS THAT OF THE SENSITIVITY OF THE PREDICTED STRUCTURAL RESPONSE TO THE VARIOUS AVAILABLE MODELS.  CONSEQUENCES OF THE DISTRIBUTION OF DAMPING IN THE STRUCTURE AND IN THE FOUNDATION ARE PRESENTED.  /AUTHOR/]]></description>
      <pubDate>Tue, 16 Oct 1973 00:00:00 GMT</pubDate>
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