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Steel and Composite Structures Volume 17, Number 3, September 2014 , pages 287-303 DOI: https://doi.org/10.12989/scs.2014.17.3.287 |
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Experimental study on hysteretic properties of SRC columns with high steel ratio |
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Xilin Lu, Xiaowei Yin and Huanjun Jiang
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| Abstract | ||
| 8 steel reinforced concrete (SRC) columns with the encased steel ratio of 13.12% and 15.04% respectively were tested under the test axial load ratio of 0.33-0.80 and the low-frequency cyclic lateral loading. The cross sectional area of composite columns was 500 mm × 500 mm. The mechanical properties, failure modes and deformabilities were studied. All the specimens produced flexure failure subject to combined axial force, bending moment and shear. Force-displacement hysteretic curves, strain curves of encased steels and rebars were obtained. The interaction behavior of encased steel and concrete were verified. The hysteretic curves of columns were plump in shapes. Hysteresis loops were almost coincident under the same levels of lateral loading, and bearing capacities did not change much, which indicated that the columns had good energy-dissipation performance and seismic capacity. Based on the equilibrium equation, the suggested practical calculation method could accurately predict the flexural strength of SRC columns with cross-shaped section encased steel. The obtained M-N curves of SRC columns can be used as references for further studies. | ||
| Key Words | ||
| axial load ratio; cyclic loading test; flexural strength; high ratio of encased steel; SRC | ||
| Address | ||
| (1) Xilin Lu, Huanjun Jiang: State Key laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China; (2) Xiaowei Yin: China Academy of Building Research, Beijing, China. | ||