三轴试验中橡胶-砂混合物泊松比计算方法研究  

Study of Poisson's Ratio Calculation Method for Rubber-Sand Mixture under the Triaxial Test

作　　者：刘娜[1] 刘方成[1] 张小强 任东滨 张永富[1] 

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007 [2]安徽海螺建材设计研究院,安徽芜湖241000

出　　处：《湖南工业大学学报》2015年第6期16-22,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51108177);湖南省自然科学基金资助项目(10JJ4040);湖南工业大学研究生科研创新基金资助项目(CX1410)

摘　　要：在分析常用确定泊松比方法的基础上,基于广义虎克定律,推导出三轴应力状态下泊松比的计算公式。根据已有的比值法、切线法和推导出的公式法,对三轴试验得到的橡胶砂混合物的泊松比变化规律进行对比分析。研究结果表明:相比于切线法、比值法,本文推导的公式法得到的橡胶砂泊松比的变化规律更合理,橡胶砂混合物的泊松比随橡胶颗粒含量的增加而呈减小的趋势,在小围压条件下,泊松比受围压影响较小。On the basis of analyzing the common method to determine the Poisson＇ s ratio and based on the generalized Hooke＇s law, deduced a calculation formula of Poisson＇s ratio under the triaxial stress state. According to the existing ratio method, tangent method and derived formula, compared and analyzed the Poisson＇ s ratio variation of the rubber-sand mixture under triaxial tests. The results show that compared with the tangent method and ratio method, the change rule of Poisson＇s ratio of rubber sand obtained by the derived formula is more reasonable. With the increase of the content of rubber particle, Poisson＇s ratio of rubber-sand mixture displays a decreasing trend. Under the condition of small confining pressure, the confining pressure has little influence on Poisson＇ s ratio.

关 键 词：三轴试验 橡胶-砂混合物 泊松比 切线法 比值法 公式法 

分 类 号：TU411.3[建筑科学—岩土工程]