雨流计数法在土体强度干湿循环效应中的应用  

Application of rain- flow counting method on drying- wetting cycle effect of soil strength

作　　者：曾召田[1,2] 赵艳林[1,2] 吕海波[1,2] 葛若东[2] 陈承佑[2] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,广西桂林541004 [2]广西大学土木建筑工程学院防灾减灾研究所,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2015年第1期186-192,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51169005;41272358);广西自然科学基金资助项目(2013GXNSFBA019233);广西教育厅项目(201204LX186)

摘　　要：针对土体强度干湿循环试验成果无法应用于工程实践的情况,通过分析雨流计数法的计数原理、计数规则和实现方法,探讨了其应用于土体强度干湿循环效应的可行性和土体应遵循的假设条件;在此基础上,通过具体实例分析,验证了雨流计数法在土体强度干湿循环效应中的应用效果。研究结果表明,土体的干湿循环效应在本质上就是一种疲劳损坏,应用雨流计数法对土体干湿循环中的含水率变化进行统计是完全可行的;通过应用雨流计数法,可把大气影响下土体的不规则含水率波动整理为较规则的含水率数据,并获得各个含水率变化幅度下的循环次数,为室内试验成果与工程实践应用搭建了一个桥梁。It is very important to solve the problem that it is difficult to apply the test results of soil strength with drying-wetting cycle effect to the engineering practice.Through analyzing the counting principle,counting rules and implementation methods of rain-flow counting one,the feasibility of its application on the drying-wetting cycle effect of soil strength is discussed and the assumption of soil is given.On this basis,the application effect of rain-flow counting method on the dry-wetting cycle effect of soil strength is verified by specific examples.The research results show that it is completely feasible to carry out statistical analysis on the moisture content of soil with drying-wetting cycle effect with the rain-flow counting method because drying-wetting cycle effect of soil is a fatigue damage in essence.It is obvious that the irregular fluctuation of moisture content of soils under the atmosphere influence can be transferred into regular data by rain-flow counting method,and the number of cy-cles with each variation of water content can also be obtained easily.Therefore,it builds a bridge between laboratory tests and engineering practice.

关 键 词：雨流计数法 干湿循环 土体强度 含水率 疲劳损伤 

分 类 号：TU443[建筑科学—岩土工程]