钢管混凝土冰胀应力分析  

Analysis of Ice Swelling Stress in Steel Pipe Concrete

作　　者：杨延岐 唐佳军 郭航 YANG Yanqi;TANG Jiajun;GUO Hang(College of Civil Engineering,Changchun University of Engineering,Changchun,Jilin Province,130000 China)

机构地区：[1]长春工程学院土木学院,吉林长春130000

出　　处：《大众科学》2024年第21期94-96,共3页China Public Science

摘　　要：主要研究钢管混凝土构件中核心混凝土未参与水化反应的自用水受冻膨胀产生的冰胀应力。利用弹性力学的方法,通过协调方程推导出在冰冻环境下混凝土的自由水相变后体积膨胀产生的冰胀力计算公式。根据公式分析得出单位体积用水量和水灰比影响mw是影响冰胀力的主要因素。冰胀力随着单位体积用水量和水灰比的增加而逐渐加大,冰胀应力与单位体积用水量基本呈线性关系,与水灰比呈对数函数关系。This paper focuses on the ice swelling stresses generated by the free-water expansion of core concrete not involved in the hydration reaction in steel pipe concrete members by freezing.Using the method of elastodynamics,the formula for the ice expansion force generated by the volume expansion of free water phase change of concrete in freezing environment is deduced by the coordination equation.According to the formula,the water consumption per unit volume and the influence of water-cement ratio mw are the main factors affecting the ice swelling force.The ice swelling force increases gradually with the increase of water consumption per unit volume and watercement ratio,and the ice swelling stress is basically linear with the water consumption per unit volume and logarithmic with the water-cement ratio.

关 键 词：钢管混凝土 冰胀应力 弹性力学 平面应变状态 

分 类 号：TU39[建筑科学—结构工程]