EVALUATION OF TORSIONAL PROVISIONS IN SEISMIC CODES

An investigtion is reported of the effects of plan asymmetry on the earthquake response of code-designed, one-story systems, and a deterimination of how well these effects are represented by torsional provisions in building codes. The study determined how the design provisions in various codes influence the element design forces. The deformation and ductility demands on resisting elements of asymmetric-plan systems are then compared with their values if the system plan were symmetric. Based on these results, deficiencies in code provisions are identified and improvements suggested. It was found that the inelastic response of code-designed asymmetric plan systems generally differs from that of the corresponding symmetric-plan systems. Plan asymmetry tends to increase the deformation of the flexible-side element and reduce the deformation of the stiff-side element in medium-period, velocity-sensitive systems. These and other study fidings are reported and discussed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Chopra, A K
  • GOEL, R K
• Publication Date: 1991-12

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 3762-82
• Serial:
  • Journal of Structural Engineering
  • Volume: 117
  • Issue Number: 12
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Building codes; Deformation; Ductility; Earthquake resistant design; Earthquake resistant structures; Earthquakes; Evaluation; Seismicity; Structural analysis; Structural design; Torsion
• Uncontrolled Terms: Seismic response
• Subject Areas: Bridges and other structures; Highways; Law; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00618338
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 1992 12:00AM