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RPC材料的抗折强度尺寸效应研究
引用本文:安明喆,张立军.RPC材料的抗折强度尺寸效应研究[J].中国矿业大学学报,2007,36(1):38-41.
作者姓名:安明喆  张立军
作者单位:北京交通大学,土木建筑工程学院,北京,100044
摘    要:为了研究活性粉末混凝土材料(RPC)的抗折强度尺寸效应,采用3种试块测量RPC材料抗折强度。通过统计分析、数据拟合,并应用Bazant断裂力学尺寸效应理论分析RPC材料尺寸效应现象。结果表明:RPC材料试块的尺寸越小,其抗折强度越大,具有明显的尺寸效应现象;基于Bazant能量释放的尺寸效应和无切口情况下的尺寸效应分别在一定的尺寸范围内与试验结果吻合良好,但是不适用于全尺寸范围;本文提出的修正公式在全尺寸范围内都能较好反映RPC抗折强度.

关 键 词:活性粉末混凝土  抗折强度  尺寸效应
文章编号:1000-1964(2007)01-0038-04
修稿时间:06 13 2006 12:00AM

Study on the Size Effect of RPC Flexural Strength
AN Ming-zhe,ZHANG Li-jun.Study on the Size Effect of RPC Flexural Strength[J].Journal of China University of Mining & Technology,2007,36(1):38-41.
Authors:AN Ming-zhe  ZHANG Li-jun
Abstract:In order to research the size effect of reactive powder concrete(RPC) flexural strength,three specimens were adopted to measure the RPC flexural strength.Based on statistical analysis,data fitting and academic analysis using Bazant fracture mechanics,the size effect of RPC flexural strength was studied.The results show that the smaller the size is the higher the flexural strength is,that is the obvious size effect phenomenon.Bazant rule based on energy liberation and the size effect rule under non-cut conditions agreed well with the experiments in different but not whole scope,but the modified formula can describe the RPC flexural strength on the whole size range.
Keywords:reactive powder concrete  flexural strength  size effect
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