再生混凝土弹性模量的计算公式研究及计算误差对比分析  

Calculation equation study and calculation error analysis of elastic modulus based on recycled aggregate concrete

作　　者：周理[1,2] 杨震[1] 伍小萍 苏益声[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]贵州大学建筑与城市规划学院,贵州贵阳550003

出　　处：《混凝土》2017年第5期143-148,共6页Concrete

基　　金：国家自然科学基金资助项目(51468003);高等学校博士学科点专项科研基金联合资助项目(20134501110001);广西科学研究与技术开发项目(桂科转1124005-1-2)

摘　　要：弹性模量是混凝土的重要力学指标,与普通混凝土相比再生混凝土的弹性模量要明显偏低,通过分析国内外学者的试验数据,采用控制初始误差的研究方法对再生混凝土的弹性模量计算公式进行拟合,并在计算公式中引入取代率这一影响参数;将拟合计算公式的计算结果与收集的国内外75组试验数据进行比较,计算结果与试验数值的相似度高、误差小。与其他研究者拟合的计算公式相比,提出的计算公式无论是在拟合数据的形态方面,还是在计算误差的控制方面,均具有良好的表现。研究结果可为再生混凝土结构的研究及工程应用提供一定的参考价值。Elastic modulus of concrete is an important mechanical parameter.Previous studies have found that the elastic modulus of recycled aggregate concrete is significantly lower compared with ordinary concrete.It collected a wide test data of domestic and foreign scholars and derived the calculation equation of elastic modulus by using the initial error control method.The new calculation equation involved the parameter of replacement ratio.It verified 75 groups of text data which carried by domestic and foreign scholars,the calculation results shows that the new equation′s calculated value has a high degree of similarity with the test data.Compared with other calculation equation,the new equation has excellent performance in both data fitting shape and error control.Results of this study can provide a reference value for the recycled aggregate concrete application in structure engineering.

关 键 词：再生混凝土 弹性模量 计算公式 计算误差 对比分析 

分 类 号：TU528.01[建筑科学—建筑技术科学]