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Structural Engineering and Mechanics Volume 59, Number 1, July10 2016 , pages 15-36 DOI: https://doi.org/10.12989/sem.2016.59.1.015 |
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Structural redundancy of 3D RC frames under seismic excitations |
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Ali Massumi and Ramin Mohammadi
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| Abstract | ||
| The components of the seismic behavior factor of RC frames are expected to change as structural redundancy increases. Most researches indicate that increasing redundancy is desirable in response to stochastic events such as earthquake loading. The present paper investigated the effect of redundancy on a fixed plan for seismic behavior factor components and the nonlinear behavior of RC frames. The 3D RC moment resistant frames with equal lateral resistance were designed to examine the role of redundancy in earthquake-resistant design and to distinguish it from total overstrength capacity. The seismic behavior factor and dynamic behavior of structures under natural strong ground motions were numerically evaluated as the judging criteria for structural seismic behavior. The results indicate that increasing redundancy alone in a fixed plan cannot be defined as a criterion for improving the structural seismic behavior. | ||
| Key Words | ||
| redundancy; overstrength capacity; ductility; seismic behavior factor; incremental dynamic analysis | ||
| Address | ||
| Ali Massumi and Ramin Mohammadi: Department of Civil Engineering, Faculty of Engineering, Kharazmi University, No. 43, Dr Moffateh Ave, Tehran 15719-14911, Iran | ||