SEISMIC RESPONSE PREDICTIONS OF BRIDGE PIER

IT IS GENERALLY ACCEPTED THAT IF A STRUCTURE IS TO WITHSTAND HIGH INTENSITY EARTHQUAKES SOME PLASTIC ACTION MUST TAKE PLACE SOMEWHERE IN THE STRUCTURE. INITIAL CONSIDERATIONS OF THE PROPOSED REINFORCED CONCRETE RAILWAY VIADUCT INDICATED THAT UNDER LATERAL LOAD, ONLY ESSENTIALLY AXIAL FORCES ARE INDUCED IN THE PIER LEGS, AND IT IS WELL KNOWN THAT AXIALLY LOADED CONCRETE IS CAPABLE OF RELATIVELY LITTLE PLASTIC ACTION. IF THE INVERTED V-FRAME CONFIGURATION IS TO BE USED IN A SIGNIFICANTLY SEISMIC ACTIVE REGION-THE CENTER OF THE NORTH ISLAND OF NEW ZEALAND-THE PROBLEM OF PROVIDING PLASTICITY IN A STRUCTURE WHICH POSSESSES LITTLE INHERENT CAPACITY TO DEFORM PLASTICALLY HAS TO BE OVERCOME. NEW ZEALAND RAILWAYS' DESIGN ENGINEERS SUGGESTED STEEL PINS SHOULD BE PLACED IN THE PIER LEGS, NEAR THEIR BASE, TO ALLOW PLASTIC DEFORMATION IN THE LEGS, AND SO INDUCE PLASTIC RESPONSE IN THE PIER. THE RESULTS OF STUDYING THE FEASIBILITY OF THIS IDEA ARE DESCRIBED. IN PARTICULAR THE POSSIBILITY IS EXAMINED OF CHOOSING PINS OF SUCH A DIAMETER THAT THEY MAY YIELD AXIALLY UNDER STRONG MOTION EARTHQUAKES AND THEREBY REMOVE SUFFICIENT ENERGY FROM THE STRUCTURES TO PROTECT IT, WITHOUT UNACCEPTABLE PLASTIC DEFORMATIONS OCCURRING. /AUTHOR/

  • Availability:
  • Supplemental Notes:
    • PROC PAPER 8949
  • Authors:
    • Shepherd, R
    • McConnel, R E
  • Publication Date: 1972-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00209718
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 3 1972 12:00AM