REINFORCED CONCRETE BUILDINGS IN MODERATE SEISMIC ZONES: PROGRESS AND PROBLEMS IN EVALUATION AND DESIGN

The questions and difficulties associated with introducing a seismic design code for the first time are discussed. The seismic risk to a populated region is not reduced much for many years after the code takes effect; only the rehabilitation of existing structures will reduce the risk significantly in a meaningful time frame. The overall behavior of buildings, especially of existing older r/c buildings, is often nearly elasto-plastic in nature because a mechanism forms soon after the formation of the first hinge and there is little or no over-strength. This may not be an optimum design in most cases. The response of r/c buildings to moderate ground motions designed only for gravity loads is better than expected, with moderate drifts and no premature brittle failures in most building types.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 427-447

Subject/Index Terms

Filing Info

  • Accession Number: 00721916
  • Record Type: Publication
  • Report/Paper Numbers: SP 157-19
  • Files: TRIS
  • Created Date: Jun 19 1996 12:00AM