TY - JOUR
T1 - Experimental study on the seismic performance of concrete filled steel tubular laced columns
AU - Huang, Zhi
AU - Jiang, Li Zhong
AU - Chen, Y. Frank
AU - Luo, Yao
AU - Zhou, Wang Bao
N1 - Funding Information:
The authors would like to express their gratitude for the financial supports provided by National Natural Science Foundation of China (Grant No. 51378502, 51408449), the Special Fund of Strategic Leader in Central South University (Grant No. 2016CSU001), and China Scholarship Council. The opinions expressed in this paper are solely of the authors, however.
Publisher Copyright:
© 2018 Techno-Press, Ltd.
PY - 2018/3/25
Y1 - 2018/3/25
N2 - Concrete filled steel tubular (CFST) laced columns have been widely used in high rise buildings in China. Compared to solid-web columns, this type of columns has a larger cross-section with less weight. In this paper, four concrete filled steel tubular laced columns consisting of 4 main steel-concrete tubes were tested under cyclic loading. Hysteresis and failure mechanisms were studied based on the results from the lateral cyclic loading tests. The influence of each design parameter on restoring forces was investigated, including axial compression ratio, slenderness ratio, and the size of lacing tubes. The test results show that all specimens fail in compression-bending-shear and/or compression-bending mode. Overall, the hysteresis curves appear in a full bow shape, indicating that the laced columns have a good seismic performance. The bearing capacity of the columns decreases with the increasing slenderness ratio, while increases with an increasing axial compression ratio. For the columns with a smaller axial compression ratio (< 0.3), their ductility is increased. Furthermore, with the increasing slenderness ratio, the yield displacement increases, the bending failure characteristic is more obvious, and the hysteretic loops become stouter. The results obtained from the numerical analyses were compared with the experimental results. It was found that the numerical analysis results agree well with the experimental results.
AB - Concrete filled steel tubular (CFST) laced columns have been widely used in high rise buildings in China. Compared to solid-web columns, this type of columns has a larger cross-section with less weight. In this paper, four concrete filled steel tubular laced columns consisting of 4 main steel-concrete tubes were tested under cyclic loading. Hysteresis and failure mechanisms were studied based on the results from the lateral cyclic loading tests. The influence of each design parameter on restoring forces was investigated, including axial compression ratio, slenderness ratio, and the size of lacing tubes. The test results show that all specimens fail in compression-bending-shear and/or compression-bending mode. Overall, the hysteresis curves appear in a full bow shape, indicating that the laced columns have a good seismic performance. The bearing capacity of the columns decreases with the increasing slenderness ratio, while increases with an increasing axial compression ratio. For the columns with a smaller axial compression ratio (< 0.3), their ductility is increased. Furthermore, with the increasing slenderness ratio, the yield displacement increases, the bending failure characteristic is more obvious, and the hysteretic loops become stouter. The results obtained from the numerical analyses were compared with the experimental results. It was found that the numerical analysis results agree well with the experimental results.
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U2 - 10.12989/scs.2018.26.6.719
DO - 10.12989/scs.2018.26.6.719
M3 - Article
AN - SCOPUS:85049408653
SN - 1229-9367
VL - 26
SP - 719
EP - 731
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 6
ER -