SEISMIC SPATIAL EFFECTS ON DYNAMIC RESPONSE OF LONG-SPAN BRIDGES IN STATIONARY INHOMOGENOUS RANDOM FIELDS

Bridges built in highly seismic regions may be subjected to strong nonlinear deformation, and the seismic analyses are usually executed in terms of step-by-step schemes in the time domain. For bridges built in low or medium intensity regions, however, the seismic responses are generally linear or weak-nonlinear, and so are usually computed using the response spectrum method. This article considers the seismic spatial effects on the dynamic response of long-span bridges in stationary inhomogenous random fields. The authors present an accurate and efficient random vibration approach, pseudo excitation method (PEM). PEM has been successfully used in the three dimensional seismic analysis of a number of long-span bridges with thousands of degrees of freedom and dozens of supports. The authors conclude that the numerical results of a typical bridge show that the seismic spatial effects, particularly the wave passage effect, are sometimes quite important in evaluating the safety of long-span bridges. The random vibration approach can conveniently take various spatial effects into account.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/16713664
• Corporate Authors:

  Science Press

  Beijing 100707,   China 
• Authors:
  • Jiahao, L
  • Yahui, Z
  • Yan, Zhongiang
• Publication Date: 2004-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 171-180
• Serial:
  • Earthquake Engineering and Engineering Vibration
  • Volume: 3
  • Issue Number: 2
  • Publisher: Springer
  • ISSN: 1671-3664
  • EISSN: 1993-503X
  • Serial URL: http://link.springer.com/journal/11803

Subject/Index Terms

• TRT Terms: Bridge foundations; Deformation; Degrees of freedom; Earthquakes; Excitation; Long span bridges; Random vibration; Seismicity
• Uncontrolled Terms: Pseudo excitation method
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics;

Filing Info

• Accession Number: 00989051
• Record Type: Publication
• Files: TRIS
• Created Date: May 2 2005 12:00AM