EXPERIMENTAL STUDY ON TANGENT POISSON RATIO OF BFRP-CONFINED CONCRETE CIRCULAR COLUMN UNDER FREEZE-THAW CYCLES AND SODIUM CHLORIDE SOLUTION
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摘要: 通过对冻融循环和盐水-冻融循环复合两种环境下连续玄武岩纤维约束混凝土圆柱的轴向抗压试验,研究环境对连续玄武岩纤维约束混凝土圆柱的割线泊松比-纵向应力曲线以及割线泊松比的影响。结果表明:在恶劣环境下连续玄武岩纤维约束混凝土圆柱的割线泊松比-纵向应力曲线受环境因素影响而发生规律性变化,在极限割线泊松比环境影响因素分析的基础上,引入环境变量,提出极限割线泊松比的计算公式,计算结果与试验值吻合较好。Abstract: Based on uniaxial compression experiments of BFRP-confined concrete circular column under freeze-thaw cycles and freeze-thaw cycles in sodium chloride solution respectively, the effects of environments on tangent Poisson ratio-longitudinal stress curves and tangent Poisson ratio were studied.The experiment results show that tangent Poisson ratio-longitudinal stress curves change regularly because of the environment effects.Based on the discussions on the environment influence factors of ultimate tangent Poisson ratio of BFRP-confined concrete circular column, environment variable was introduced in analyzing the influence by aggressive environments and calculation formulas for ultimate tangent Poisson ratio under aggressive environments were presented.The analytical results were in good agreement with the test results.
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