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Assessment of pushover-based method to a building with bidirectional setback

  • Fujii, Kenji (Department of Architecture, Chiba Institute of Technology)
  • 투고 : 2016.03.03
  • 심사 : 2016.09.03
  • 발행 : 2016.09.25

초록

When conducting seismic assessment of an asymmetric building, it is essential to carry out three-dimensional analysis considering all the possible directions of seismic input. For this purpose, the author proposed a simplified procedure is to predict the largest peak seismic response of an asymmetric building subjected to horizontal bidirectional ground motion acting in an arbitrary angle of incidence in previous study. This simplified procedure has been applied to torsionally stiff (TS) asymmetric buildings with regular elevation. However, the suitability of this procedure to estimate the peak response of an asymmetric building with vertical irregularity, such as an asymmetric building with setback, has not been assessed. In this article, the pushover-based simplified procedure is applied to estimate the peak response of asymmetric buildings with bidirectional setback. Nonlinear dynamic (time-history) analysis of two six-storey asymmetric buildings with bidirectional setback and designed according to strong-column weak beam concept is carried out considering various directions of seismic input, and the results compared with those estimated by the proposed method. The largest peak displacement estimated by the simplified method agrees well with the envelope of the dynamic analysis response. The suitability assessment of the simplified procedure to analysed building models is made as well based on pushover analysis results.

키워드

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  3. A multimodal adaptive evolution of the N1 method for assessment and design of r.c. framed structures vol.12, pp.3, 2017, https://doi.org/10.12989/eas.2017.12.3.271
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  6. Accounting for the Spatial Variability of Seismic Motion in the Pushover Analysis of Regular and Irregular RC Buildings in the New Italian Building Code vol.10, pp.10, 2020, https://doi.org/10.3390/buildings10100177
  7. Application of Mode-Adaptive Bidirectional Pushover Analysis to an Irregular Reinforced Concrete Building Retrofitted via Base Isolation vol.11, pp.21, 2021, https://doi.org/10.3390/app11219829
  8. Seismic vulnerability assessment of RC buildings with setback irregularity vol.13, pp.1, 2022, https://doi.org/10.1016/j.asej.2021.05.001