河冰力学性能试验研究

Experimental study on mechanical behavior of river ice

为了解决流冰对桥梁结构作用研究中河冰强度取值问题,对黑龙江省呼玛河河冰进行抗压强度和抗弯强度试验,结合国内现有河冰力学性能研究成果,采用统计分析方法,研究了河冰力学性能。得出各温度、各加载速率下,河冰抗压、抗弯强度取值,并研究了温度、应变速率与抗压强度和抗弯强度之间的关系,建立了冰温与抗压强度的数学模型;根据压缩试验、弯曲试验资料分别探讨了河冰弹性模量的取值,分析了温度、加载速率同弹性模量的关系,建立了冰温与弹性模量的数学模型。该成果为研究河冰与桥梁结构动力相互作用过程和流冰载荷计算方法奠定了基础。

The mechanical behavior of river ice is one of the most important parameters in the study on the percussive force of drift ice against bridge.In order to study the strength of river ice,the compressive strength and flexural strength tests on Huma river ice in Heilongjiang Province were conducted and the results were analyzed using statistical methods.The compressive strength and flexural strength with different temperatures and different loading rates were obtained.The effect of temperature and strain rate on the compressive strength,the flexural strength and the elastic module of river ice were studied.The mathematics model between the compressive strength or the elastic module and ice temperature were established.The study provides a solid foundation for studying the dynamic process of river ice and bridge structure.