1. Study on intensity measure of incremental dynamic analysis for high-rise structures.
- Author
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ZHOU Ying, SU Ningfen, and LU Xilin
- Subjects
- *
STRUCTURAL engineering , *STRUCTURAL analysis (Engineering) , *SPECTRUM analysis , *DYNAMICS , *MATHEMATICAL models , *POWER electronics - Abstract
In this paper, typical characteristics, state of the art and existing problems of intensity measure (IM) parameters are firstly summarized. To consider the contribution of higher modes for the incremental dynamic analysis (IDA) of high-rise structures, an IM parameter in terms of the multiply of power-law functions was proposed, in which response spectra at major periods are the bottom number and corresponding modal mass participation proportions are the exponent. Then IDA of a high-rise SRC frame-RC tube structure was employed to investigate the efficiency of the proposed IM S12 and S123, in which the first two and three modes are considered, respectively. Comparison with PGA, PGV, Sa(T1, ξ), S* proposed by Cordova was made as well. The results show that Sa(T1, ξ) is more efficient than PGA even for high-rise structures. PGV is proven to be efficient relative to the single spectral value Sa(T1, ξ) and measures S* and S12 presented by two spectral values, but deficient relative to the S123 presented by three spectral values. It is found that the more modes are considered, the more efficient the IM is. From the view of engineering application, S123 is recommended for the IDA of high-rise structures. [ABSTRACT FROM AUTHOR]
- Published
- 2013