Seismic Safety and Post-Earthquake Resilience of Frame with Debonded High-Strength Reinforced Concrete-Encased-and-Filled Steel Tubular Columns

ABSTRACT

The incremental dynamic analysis of a ten-floor frame archetype whose concrete encased-and-filled steel tubular (CEFST) columns with debonded high-strength reinforcements (DHSRs) was performed. Seismic fragility results showed the use of DHSR is beneficial for the seismic safety of CEFST frame system, especially for the prevention of seismic collapse. The utilization of CEFST columns with DHSRs in the first three stories alone introduced a small probability of seismic damage. The fragility curves of residual story lateral drifts indicated the use of DHSR can significantly mitigate the residual deformation. Precise evaluation of residual drift of frame structure should be further studied.

KEYWORDS:

• Seismic fragility
• post-earthquake resilience
• DHSR
• IDA
• residual deformation

Acknowledgement

This research was supported by the National Natural Science Foundation of China (Project No. 52278194) and by financial support for postdoctoral researchers was also received from Shenzhen City, Guangdong Province, China. The support of Japan Society for the Promotion of Science (JSPS,No.P22357) was also acknowledged. The authors declare that they have no conflicts of interest.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Ethical Approval

The authors state that the research was conducted according to ethical standards.

Additional information

Funding

The work was supported by the National Natural Science Foundation of China [51708288]