Modal Pushover Analysis for Unsymmetric Buildings

The modal pushover analysis (MPA) procedure for estimating seismic demands is extended to unsymmetric-plan buildings. In the MPA procedure, the seismic demand due to individual terms in the modal expansion of the effective earthquake forces is determined by nonlinear static analysis using the inertia force distribution for each mode, which for unsymmetric buildings includes two lateral forces and torque at each floor level. These “modal” demands due to the first few terms of the modal expansion are then combined by the CQC rule to obtain an estimate of the total seismic demand for inelastic systems. The MPA estimates of seismic demand for torsionally-stiff and torsionally-flexible unsymmetric systems are shown to be similarly accurate as they are for the symmetric building; however, the results deteriorate for a torsionally-similarly-stiff unsymmetric-plan system.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407533
• Corporate Authors:

  American Society of Civil Engineers

  International Headquarters, 1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400

  Structural Engineering Institute

  American Society of Civil Engineers
  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Goel, Rakesh K
  • Chopra, Anil K
• Conference:
  • Metropolis and Beyond
  • Location: New York NY, United States
  • Date: 2005-4-20 to 2005-4-24
• Publication Date: 2005

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References;
• Pagination: 9p
• Monograph Title: Metropolis and Beyond: Proceedings of the 2005 Structures Congress and the 2005 Forensic Engineering Symposium, April 20-24, 2005, New York, NY

Subject/Index Terms

• TRT Terms: Asymmetry; Earthquake engineering; Earthquake resistant design; Earthquake resistant structures; Force; Nonlinear systems; Structural design; Structures; Torque
• Uncontrolled Terms: Inelastic systems; Modal pushover analysis; Torsional stiffness
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01033685
• Record Type: Publication
• ISBN: 0784407533
• Files: TRIS
• Created Date: Sep 29 2006 10:38AM