Seismic resilience design of prefabricated modular pressurized buildings

Abstract

The seismic intensity is generally high in the Qinghai-Tibet Plateau region of China. The seismic performance of the new prefabricated modular pressurized buildings used to solve the plateau response is insufficient. To solve this problem, the small friction pendulum bearing (FPB) isolation design is proposed for modular pressurized buildings. Firstly, a simplified model of cross-truss support for the pressurized module is proposed to simplify the modeling and calculation of the pressurized buildings. The reasonability of the simplified model is verified by comparing the refined finite element model. Subsequently, according to the FPB design process for modular pressurized buildings, a small FPB for isolation is provided for a two-story modular pressurized building under 8-degree fortification earthquakes. Lastly, the seismic effectiveness and constructional feasibility of the isolation structure are verified compared with the non-isolated structure using dynamic time-history analysis. The study results show that the size of FPBs for modular pressurized buildings should consider both displacement and dimension requirements to weigh seismic isolation performance and installation feasibility, respectively. When adopting FPBs, the response of the structure is significantly reduced, and the seismic isolation effect is obvious. The proposed construction process can improve the seismic resilience of the prefabricated modular pressurized buildings by replacing post-earthquake damaged components quickly. It provides ideas for the seismic isolation design of the prefabricated modular pressurized buildings in high seismic intensity areas.

Keywords

Modular pressurized buildings / Seismic isolation / Time-history dynamic analysis / Fast construction / Seismic resilient design

CRediT authorship contribution statement

Zhiwu Ye: Resources, Funding acquisition, Conceptualization. Haifeng Bu: Writing - review & editing, Writing - original draft, Visualization, Validation, Software, Methodology, Investigation, Formal analysis, Data curation. Zhimao Liu: Resources, Funding acquisition, Conceptualization. Deng Lu: Supervision, Resources, Investigation, Funding acquisition, Conceptualization. Dong Min: Writing - review & editing, Validation, Supervision, Resources, Methodology, Investigation, Conceptualization. Hongbo Shan: Visualization, Validation, Supervision, Investigation, Conceptualization.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgments

The work was supported by Technology Research and Development Program of China Construction Advanced Technology Research Institute (Grant No. XJY-2024-16)

Relevance to resilience

The seismic resilience of the building structures involves both aspects: strengthening building performance and improving post-earthquake recovery. The seismic intensity is generally high in the Qinghai-Tibet Plateau region of China. The seismic performance of the new prefabricated modular pressurized buildings used to solve the plateau response is insufficient. A new designed resilient building type is proposed based on small friction pendulum bearing isolation. By adopting isolation bearings and a new proposed construction process, the seismic performance of the structure is significantly improved. What is more, the proposed fast construction process can improve the post-earthquake recovery states of prefabricated modular pressurized buildings by replacing damaged components quickly. It provides ideas for the seismic resilience design of the prefabricated modular pressurized buildings in high seismic intensity areas.

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