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| Concrete cover of shape steel in transfer columns of SRC-RC hybrid structure |
| 1.College of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2.School of Civil Engineering, Xi′an University of Architecture ＆ Technology, Xi′an, Shaanxi 710055, China |
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Abstract The low cyclic shear experiments of 16 transfer column specimens were carried out. The results show that due to the shear effect of specimens, the increased arrangement of stirrups can obviously improve postpeak behavior and energy dissipation ability of the transfer columns. The parameters of steel skeleton configuration, axial compressive ratio, bond performance between concrete and shape steel can affect the critical concrete cover thickness of steel flanges remarkably. If critical shear cracks are engendered mainly due to the serious shear effect from partially existence of shape steel, the concrete cover is maybe crushed under axial compression. The bearing capacity is decreased markedly with diminished restriction of stirrups on cracks, and the seismic behavior demand of transfer columns can not be satisfied. To improve the bond performance between two materials and prevent the crush of concrete cover, the concrete cover thickness of steel flanges should not less than the maximum of fifth section height and not less than 50 mm.
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Received: 17 September 2012
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2013, Vol. 34 
