氯离子环境下钢筋混凝土棱柱体抗压力学性能试验研究

针对近海地区混凝土结构在氯离子侵蚀作用下其力学性能不断降低的问题,采用试验研究和理论分析的方法,先对12组RC棱柱体试件在盐雾腐蚀实验室进行了氯离子腐蚀试验,然后对其进行轴心抗压试验。以混凝土强度和锈胀裂缝宽度为变化参数,研究试件在轴心抗压试验下的受压应力-应变曲线,分析试件强度、刚度、延性等的变化规律。结果表明:随着混凝土强度的增大,试件的承载力和延性不断提高;随着箍筋锈蚀裂缝宽度的增大,试件的峰值荷载减小,强度降低,延性变差。

Experimental Study on Mechanical Properties of Reinforced Concrete Prisms under Chloride Corrosion

In view of the problem that the mechanical properties of concrete structures in offshore area under the chloride ion erosion are decreasing,using experimental research and theoretical analysis methods,12 RC prism specimens were tested for chloride ion corrosion in salt spray corrosion laboratory,and then axial compression experiments were implemented.Taking the concrete strength and the crack width as parameters,the compressive stress-strain curves of specimens under axial compression test were studied and the variation of strength,stiffness and ductility of specimens were analyzed.The result shows that with the increase of the concrete strength,the bearing capacity and the ductility of the specimens continue to improve,while with the increase of the width of the stirrup rust cracks,the peak load,the strength and the ductility decrease.