Abstract
When evaluating the seismic safety and reliability of complex engineering structures, it is a critical problem to reasonably consider the randomness and multi-dimensional nature of ground motions. To this end, a proposed modeling strategy of multi-dimensional stochastic earthquakes is addressed in this study. This improved seismic model has several merits that enable it to better provide seismic analyses of structures. Specifically, at first, the ground motion model is compatible with the design response spectrum. Secondly, the evolutionary power spectrum involved in the model and the design response spectrum are constructed accordingly with sufficient consideration of the correlation between different seismic components. Thirdly, the random function-based dimension-reduction representation is applied, by which seismic modeling is established, with three elementary random variables. Numerical simulations of multi-dimensional stochastic ground motions in a specific design scenario indicate the effectiveness of the proposed modeling strategy. Moreover, the multi-dimensional seismic response and the global reliability of a high-rise frame-core tube structure is discussed in detail to further illustrate the engineering applicability of the proposed method. The analytical investigations demonstrate that the suggested stochastic model of multi-dimensional ground motion is available for accurate seismic response analysis and dynamic reliability assessment of complex engineering structures for performance-based seismic resistance design.
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Acknowledgement
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51978543, 52108444, and 51778343), the Plan of Outstanding Young and Middle-aged Scientific and Technological Innovation Team in the Universities of Hubei Province (Project No. T2020010), and the Natural Science Foundation of Hebei Province (Grant No. E2021512001). The above organizations are highly appreciated.
Funding
National Natural Science Foundation of China under Grant Nos. 51978543, 52108444, and 51778343, Plan of Outstanding Young and Middle-aged Scientific and Technological Innovation Team in the Universities of Hubei Province with Project No. T2020010, and Natural Science Foundation of Hebei Province under Grant No. E2021512001
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Zhangjun, L., Xinxin, R. & Zixin, L. Performance-based global reliability assessment of a high-rise frame-core tube structure subjected to multi-dimensional stochastic earthquakes. Earthq. Eng. Eng. Vib. 21, 395–415 (2022). https://doi.org/10.1007/s11803-022-2097-0
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DOI: https://doi.org/10.1007/s11803-022-2097-0