QUASI-STATIC TESTS OF WALLED CONCRETE-FILLED STEEL TUBULAR COLUMNS WITH BINDING BARS

HAO Ji-ping; HUANG Yu-qi; FAN Chun-lei; XUE Qiang

doi:10.6052/j.issn.1000-4750.2020.11.0821

Volume 38 Issue 12

Nov. 2021

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Engineering Mechanics > 2021 > 38(12): 39-48. > DOI: 10.6052/j.issn.1000-4750.2020.11.0821

HAO Ji-ping, HUANG Yu-qi, FAN Chun-lei, XUE Qiang. QUASI-STATIC TESTS OF WALLED CONCRETE-FILLED STEEL TUBULAR COLUMNS WITH BINDING BARS[J]. Engineering Mechanics, 2021, 38(12): 39-48. DOI: 10.6052/j.issn.1000-4750.2020.11.0821

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QUASI-STATIC TESTS OF WALLED CONCRETE-FILLED STEEL TUBULAR COLUMNS WITH BINDING BARS

HAO Ji-ping^{1, 2,},
HUANG Yu-qi^{1, 3, ,},
FAN Chun-lei^{1, 3,},
XUE Qiang^{1, 3}

1.
School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China
2.
Key Lab of Structural Engineering and Earthquake resistance, Ministry of Education (XAUAT), Xi’an 710055, China
3.
Prefabricated Steel Structure Research Institute Company Limited of Xi’an University of Architecture & Technology, Xi’an 710055, China

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Received Date: November 12, 2020
Revised Date: January 27, 2021
Available Online: March 05, 2021

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Abstract

Abstract

To avoid column protruding from the infill wall in multi-story steel structure buildings, a walled concrete-filled steel tube column with binding bars and with a section height-to-width ratio of 3.0 is proposed. To study the seismic behavior of the walled concrete-filled steel tubular column with binding bars (WCFT-B Column), the quasi-static experiments were conducted on two full-scale specimens. The test results show that: the binding bars can effectively restrain the local buckling of the column walls on both sides; the specimens fail in the local buckling of steel plates, and the longitudinal welds tear between steel plates at the bottom of the column; the hysteresis curves of the specimen are relatively plump without significant pinching effects; the yield drift ratios of the specimens vary 1/147 rad to 1/121 rad and the ultimate drift ratios are between 1/51 rad and 1/41 rad; the displacement ductility coefficient is about 2.61 to 3.11 and the bearing capacity degradation coefficients of the specimens are between 0.86 and 1.04; upon the failure of the specimens, the equivalent viscous damping coefficients are above 0.3. Based on the quasi-static experiments, the finite element (FE) model of the specimens was developed; The FE results are in a good agreement with the test ones, which verify the correctness of the FE model and provide a reference for the numerical simulation of such components. The research results enriched the types of rectangular concrete-filled steel tube composite components and promoted the development of fabricated steel structure buildings.
- walled concrete-filled steel tubular column,
- binding bar,
- quasi-static test,
- finite element analysis,
- seismic behavior

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QUASI-STATIC TESTS OF WALLED CONCRETE-FILLED STEEL TUBULAR COLUMNS WITH BINDING BARS

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