Seismic performance evaluation of CFT column structures using CFRP and HCFRP

Young Chan Kim , Seyed Javad Mortazavi , Jong Wan Hu

Abstract

Concrete-filled steel tubes (CFSTs) are composite systems applied to earthquake-resistant structures that enhance structural performance such as strength and ductility by combining the confinement effect of steel tubes with the compressive capacity of concrete. However, steel, the primary component of CFST, is susceptible to corrosion when exposed to the external environment over extended periods, which can lead to degradation of structural performance and even structural collapse. To address issues and enhancing the performance of CFST columns, this study conducted a numerical analysis on concrete-filled CFRP tube (CFCT) and concrete-filled hybrid CFRP tube (CFHT) column structures, which replace steel with CFRP. In addition, to evaluate the seismic performance of CFCT and CFHT columns, the results of the numerical analysis were statistically analyzed for roof displacement, inter-story drift ratio, residual inter-story drift ratio, column stress, energy dissipation amount and permanent deformation. Consequently, the CFCT and CFHT column structures exhibited superior seismic performance in evaluation results.

Key Words

cfrp; cft column; frame structure; numerical analysis; seismic performance

Address

Young Chan Kim — 1)Department of Civil and Environmental Engineering, Incheon National University, Incheon 22012, Republic of Korea 2)Industry-Academic Cooperation Foundation, Incheon National University, Incheon 22012, Republic of Korea 3)Incheon Disaster Prevention Research Center, Incheon National University, Incheon 22012, Republic of Korea
Seyed Javad Mortazavi — Incheon Disaster Prevention Research Center, Incheon National University, Incheon 22012, Republic of Korea
Jong Wan Hu — 1)Department of Civil and Environmental Engineering, Incheon National University, Incheon 22012, Republic of Korea 2)Incheon Disaster Prevention Research Center, Incheon National University, Incheon 22012, Republic of Korea

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