Experimental Investigation on the Seismic Behavior of Ultra-High Performance Concrete Filled Steel Tubular Columns

Abstract

ABSTRACTIn this work, a total of nine ultra-high performance concrete (UHPC) filled steel tubular columns (UHPCFSTs) were fabricated and tested under cyclic loading. The results indicated that UHPCFSTs mainly exhibited flexural failure mode, compression-flexure failure mode and welding line fracture, and it changed from flexural failure mode to compression-flexure failure mode when the axial compression ratios exceeded 0.3. The elastic and ultimate drift ratios of UHPCFSTs were within the ranges of 1.37–2.05% and 2.38–4.32%, respectively, and the equivalent viscous damping coefficients were within the range of 0.197–0.358 when they failed, UHPCFSTs could sever as good choices in high seismic intensity areas.KEYWORDS: Cyclic behaviorUHPCFST columnshysteretic modelmachine learninghysteretic curve Disclosure StatementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe present work was supported by the Key Program of National Natural Science Foundation of China [Grant Nos. 51738011] and Research Project of Hubei Polytechnic University [Grant Nos. 23×jz03R].