STRESS REDUCTION SYSTEM OF MEDIUM SPAN BRIDGES USING SEMIACTIVE CONTROLS

Vehicle-induced vibrations of bridges tend to accelerate deck wear and to produce high cycle fatigue effects. Many U.S. interstate bridges constructed of continuous girders with composite concrete decks are now considered to have reached the limit of their useful life due to truck impact loads. The Center for Structural Control at the University of Oklahoma has spearheaded the development of an intelligent stiffener for bridges (ISB). The ISB consists of a computer-controlled hydraulic system that is easily retrofitted to an existing bridge superstructure. Field tests of the system indicate that the ISB reduces maximum stress range in the NCHRP 299 suggests that the ISB system extends the safe working life of a bridge by at least five decades. The ISB system will make it possible to avoid the reconstruction of many highway bridges at about 10% of the cost of replacement.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025
• Authors:
  • PATTEN, W N
  • Sun, Jinlong
  • Li, Guoxiang
• Conference:
  • Proceedings of the U.S.-Italy Workshop on Seismic Protective Systems for Bridges
  • Location: Columbia University, New York, NY
  • Date: 1998-4-27 to 1998-4-28
• Publication Date: 1998-11-3

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 299-312

Subject/Index Terms

• TRT Terms: Bridge superstructures; Bridges; Computers; Loads; Retrofitting; Stresses; Vehicle weight; Vibration
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00779888
• Record Type: Publication
• Report/Paper Numbers: MCEER-98-0015
• Contract Numbers: DTFH51-92-C-00106
• Files: TRIS
• Created Date: Dec 22 1999 12:00AM