Abstract
The performance of tall buildings in earthquake-prone regions has been improved due to more accurate representation of seismic action in design regulations and codes. The current design practice addresses two performance levels and appropriate seismic input representation: (i) the Service Level—the standard Response Spectrum Approach is allowed and (ii) the Collapse prevention level—nonlinear dynamic analysis approach is required (CTBUH 2008). The applicability of time-domain approach for the seismic analysis and design of tall, flexible buildings, subjected to long predominant period ground motions (so called “Mexico-City effects”) is discussed in our paper. The main techniques used by practitioners to obtain ground acceleration time-series are reviewed and discussed. The study mostly focuses on the use of Probabilistic Seismic Hazard Analysis (PSHA) tool and its derivatives (i.e. Uniform Hazard Spectrum and Conditional Mean Spectrum) approach in order to obtain adequate site-dependent input ground motions to be used in the nonlinear dynamic analyses. The evaluation of structural performance of a case-study tall, flexible steel building structure is done by using strength-based design criteria based on demand-to-capacity ratios (DCR) of members. The “peaks-over-threshold” approach is used in conjunction with strength-based principles in order to check the compliance with deformation-based criteria.
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Acknowledgements
Funding for this research was provided by the Romanian National Authority for Scientific Research (ANCS) under the Grant Number 72/2012. This support is gratefully acknowledged. The earthquakes catalogue of Vrancea subcrustal source was provided by the National Institute for Earth Physics (INFP) within BIGSEES Project. The contribution of Professor Radu Vacareanu (UTCB) and Dr. Florin Pavel (UTCB) to the seismic hazard analyses is highly acknowledged.
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Iancovici, M., Vezeanu, G. (2016). A Time-Domain Approach for the Performance-Based Analysis of Tall Buildings in Bucharest. In: Vacareanu, R., Ionescu, C. (eds) The 1940 Vrancea Earthquake. Issues, Insights and Lessons Learnt. Springer Natural Hazards. Springer, Cham. https://doi.org/10.1007/978-3-319-29844-3_23
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