| Civil Engineering |
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| Performance of stainless steel reinforced concrete column under small eccentric compression |
| WANG Hai-long1, LING Jia-yan1, SUN Xiao-yan1, LI Xiao-bin2 |
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
2. Central Research Institute of Building and Construction Limited Company, MCC Group, Beijing 100088, China |
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Abstract A new stainless steel was adopted as an alternative of traditional carbon steel in order to solve the corrosion issue of steel rebar in concrete structures subjected to chloride environment. Experiments were conducted to analyze the performances of stainless steel reinforced concrete columns under small eccentric compression. The failure mode, the deformation and the crack development of the column were analyzed. The constitutive models of the stainless steel were compared with the test results and were utilized to calculate the ultimate loading capacity of stainless steel reinforced column. Results showed that the strain distribution in the cross section accorded with the plane hypothesis. The deformations of columns can be divided into three stages:elasticity stage, cracking stage and failure stage. The failure mode of stainless steel reinforced component is the same as that of the carbon steel component under eccentric compression, but the deformation of stainless steel reinforced column is much larger than the column reinforced with carbon steel bars, which indicates that the stainless steel reinforced member has a better ductility. The results of using the double slash model for capacity analysis accorded well with the experimental results. The model has a certain safety stock. Increasing the concrete strength will enhance the ultimate load capacity, and the capacity enhancement is obvious when the cube crushing strength of concrete is around 70 MPa.
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Received: 04 September 2017
Published: 11 October 2018
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不锈钢筋混凝土柱小偏心受压性能
为了解决氯盐环境下混凝土结构中钢筋的锈蚀问题，采用新型的不锈钢代替传统碳素钢筋，开展不锈钢筋小偏压柱试验研究，探讨不锈钢筋混凝土柱小偏心受压的破坏过程以及各阶段的变形与裂缝发展规律，分析不锈钢筋的本构模型，开展小偏心受压构件极限承载能力的理论计算.结果表明：不锈钢筋混凝土小偏压柱跨中截面应变分布符合平截面假定，受力过程可以分为弹性、开裂、破坏3个阶段；不锈钢筋混凝土柱小偏心受压破坏模式与碳素钢筋小偏压柱相同，但变形较大，与碳素钢筋偏压柱相比具有更好的延性；不锈钢筋本构模型采用双斜线模型时与试验结果符合较好，且具有一定的安全储备，建议受压设计时予以采用；提升混凝土强度能够提高柱子受压极限承载能力，针对本文的不锈钢筋C70左右的混凝土提升效果较好.
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