华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (8): 98-102.

• 材料科学与技术 • 上一篇    下一篇

混凝土抗压强度回弹测试数据的分形分析

胡小芳 胡大为   

  1. 华南理工大学 工业装备与控制工程学院,广东 广州 510640
  • 收稿日期:2006-01-19 出版日期:2007-08-25 发布日期:2007-08-25
  • 通信作者: 胡小芳(1956-),男,教授,博士,主要从事粉体材料加工及其改性,碳素及二次电池材料研究. E-mail:123hudawei@ 163. com
  • 作者简介:胡小芳(1956-),男,教授,博士,主要从事粉体材料加工及其改性,碳素及二次电池材料研究.
  • 基金资助:

    广东省科技攻关项目(2005B10301051 )

Fractal Analysis of Rebound Testing Data for Compression Strength of Concrete

HuXiao-fang  Hu Da-wei   

  1. School of Industrial Equipment and Control Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-01-19 Online:2007-08-25 Published:2007-08-25
  • Contact: 胡小芳(1956-),男,教授,博士,主要从事粉体材料加工及其改性,碳素及二次电池材料研究. E-mail:123hudawei@ 163. com
  • About author:胡小芳(1956-),男,教授,博士,主要从事粉体材料加工及其改性,碳素及二次电池材料研究.
  • Supported by:

    广东省科技攻关项目(2005B10301051 )

摘要: 分形理论在处理无规离散数据方面具有独特优点,应用于混凝土抗压强度回弹测试数据这一无规离散数据的处理时,能够得到比常规回归法更加可靠的抗压强度数据.文中通过在二维平面坐标上建立回弹测点位直-回弹值曲线(RPV 曲线) ,采用盒维数计算法编制计算程序,得出RPV 曲线的分形维数,并用来推算混凝土抗压强度.结果表明,RPV 曲线分形维数与混凝土抗压强度间具有线性关系,且该法推算混凝土抗压强度可在不测试碟化深度的情况下进行,适应于大体积混凝土抗压强度的检测,为简化混凝土抗压强度的检测提供了新途径.

关键词: 混凝土, 抗压强度, 回弹法, 数据分析, 分形, RPV 曲线

Abstract:

Fractal theorγis of special merits in processing random and discrete data. When it is adopted to analyze the rebound testing data of random and discrete compression strength of concrete , much more reliable results can be obtained , as compared with the general regression method. In this paper , the Rebound Measuring Point PositionRebound Value curve (RPV curve) on a 2D coordinate plane is established , and the box-dimension calculation inethod is adopted to design a calculation program to obtain the fractal dimension of the RPV curve and to calculate the compression strength of concrete. The results show that there is a linear relationship between the fractal dimension of the RPV curve and the compression strength , and that the proposed method can calculate the compression strength without testing the carbonation depth. Moreover , it suits the compression strength testing of concrete with big volumes and thus offers a new simplified approach to the detection of the compression strength of concrete.

Key words: concrete, compression strength, rebound method, data analysis, fractal, RPV curve