Nonlinear Seismic Response of Asymmetric Structures
Abstract
The purpose of this study was to investigate the nonlinear, inelastic response of one-story, symmetric- and asymmetric-plan structures to uniaxial and biaxial lateral earthquake ground motions. The investigation is a combined experimental and analytical program. Through the study, the lateral-torsional response of the system was studied for a range of system parameters with the goals of examining the adequacy of current building code torsional design assumptions and the ability of analytical software to predict inelastic response. The experimental part of the investigation involved subjecting a single-story steel moment-frame to a series of uniaxial and biaxial earthquake ground motions on the U.S. Army CERL shaketable. The analytical part of the investigation involved the nonlinear finite element programs Abaqus and Drain-3DX to analyze the response of the model during the earthquake simulations. Implications of the experimental results on the adequacy of seismic design provisions are discussed. In addition, the ability of analytical software to predict inelastic torsional response is discussed for both a model tuned to the measured dynamic properties of the actual structure and a model based on common modeling assumptions. Further, the effects on prediction accuracy of different analytical modeling parameters and assumptions is discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2003
- Accession Number
- ADA421318
Entities
People
- Jon F. Sfura
Organizations
- Engineer Research and Development Center