SAFETY AND RELIABILITY OF SUSPENSION BRIDGES

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/

• Corporate Authors:

  Intl Conf Structural Safety

  ,    
• Authors:
  • Konishi, I
• Conference:
  • Intl Conf Structural Safety
• Publication Date: 1972

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 267-97

Subject/Index Terms

• TRT Terms: Aerodynamics; Design; Earthquake resistant design; Earthquake resistant structures; Safety; Stability (Mechanics); Suspension bridges
• Subject Areas: Bridges and other structures; Design; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00210230
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper
• Files: TRIS
• Created Date: Dec 11 1973 12:00AM