Incremental dynamic analysis

doi:10.1002/eqe.141

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Incremental dynamic analysis

2001-12-19

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Dimitrios Vamvatsikos

C. Allin Cornell *

DOI：10.1002/eqe.141

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Abstract

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Incremental dynamic analysis (IDA) is a parametric analysis method that has recently emerged in several different forms to estimate more thoroughly structural performance under seismic loads. It involves subjecting a structural model to one (or more) ground motion record(s), each scaled to multiple levels of intensity, thus producing one (or more) curve(s) of response parameterized versus intensity level. To establish a common frame of reference, the fundamental concepts are analysed, a unified terminology is proposed. suitable algorithms are presented, and properties of the IDA curve are looked into for both single-degree-of-freedom and multi-degree-of-freedom structures. In addition, summarization techniques for multi-record IDA studies and the association of the IDA study with the conventional static pushover analysis and the yield reduction R-factor are discussed. Finally, in the framework of performance-based earthquake engineering, the assessment of demand and capacity is viewed through the lens of an IDA study. Copyright (C) 2001 John Wiley Sons, Ltd.

Keywords:

performance-based earthquake engineering

incremental dynamic analysis

demand

collapse capacity

limit-state

non-linear dynamic analysis

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