HUANG Zhi,XIONG Luzeng,JIANG Lizhong,et al.Experimental Study and Parameter Analysis of Four‑tube Concrete‑filled Steel Tube Lattice Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):616-622.
HUANG Zhi,XIONG Luzeng,JIANG Lizhong,et al.Experimental Study and Parameter Analysis of Four‑tube Concrete‑filled Steel Tube Lattice Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):616-622. DOI: 10.13409/j.cnki.jdpme.20221014002.
Experimental Study and Parameter Analysis of Four‑tube Concrete‑filled Steel Tube Lattice Columns
To investigate the stress mechanism and seismic performance of the four-tube concrete-filled steel tube (CFST) lattice columns
quasi-static tests and finite element analysis were conducted on four specimens. The hysteresis and skeleton curves of the four-tube CFST lattice columns under low-cycle repeated loads were obtained through experiments
and the failure process of the specimens was analyzed. The results showed that the lattice columns exhibited good energy dissipation capacity and ductility. The axial compression ratio mainly affected the specimens during the failure stage
with a larger axial compression ratio leading to a greater slope in the descending section of the bearing capacity. However
the slenderness ratio had a significant effect on the stress performance of the specimens. With the increase in slenderness ratio
the yield and ultimate displacement of the specimens increased
but the horizontal bearing capacity and the slope in the failure section decreased. A numerical calculation model was established and compared with the experimental results to verify its accuracy. The effects of parameters
including different height-to-width ratios and ratios of section spacing to the column outer diameter
on the specimens' elastic stiffness and bearing capacity were analyzed. The results indicated that reducing the height-to-width ratio and the ratio of section spacing to column outer diameter significantly improved the stress performance of CFST lattice columns. It is suggested that in practical engineering
the height-to-width ratio of the columns should not exceed 4.8
and the ratio of spacing between limbs to column outer diameter should not exceed 7.0.
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Related Institution
School of Civil Engineering , Shandong Jianzhu University
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Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology
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