- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | TANG Hongyuan, LI Zhengzhou, FAN Luyao, YANG Hong. Experimental Investigation on Behavior of Rectangular Concrete-Filled Stainless Steel Tubular Stub Columns under Axial Loading[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 855-864. doi: 10.3969/j.issn.0258-2724.20200416
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In order to study the axial compressive behavior of rectangular concrete-filled stainless steel tubular (CFSST) short columns, axial compression tests were conducted on seven groups of rectangular CFSST short columns with different cross-sectional sizes. The failure modes, load-displacement curves, load-circumferential strain curves, load-longitudinal strain curves, and load-cross-sectional aspect ratio curves of different specimens under axial compression were obtained. The influence of aspect ratio of the rectangular cross-section on the bearing capacity of the specimens was analyzed. The results show that the typical failure mode of rectangular CFSST short columns under axial compression was local outward buckling. Under the same aspect ratio, when the wall thickness of the specimens increases from 4 mm to 6 mm, the bearing capacity of the specimens increases by 25%–57%. With the fixed wall thickness, when the aspect ratio of specimens increases from 1 to 2, the bearing capacity decreases by 22%–30%. Comparison of the test results with the calculated results by relevant codes and standards indicates that the bearing capacity of CFSST stub columns is more than 14% higher than that of the concrete-filled conventional carbon steel tubular stub columns with the same section. Furthermore, a formula for calculating the axial compression bearing capacity is obtained by numerical fitting of the data obtained in this study and those from literature, which can well predict the bearing capacity of rectangular CFSST short columns.
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