| 混凝土构件检测样本容量的确定方法 |
| |
| 引用本文： | 赵鸣,冯海华.混凝土构件检测样本容量的确定方法[J].数学的实践与认识,2007,37(23):18-25. |
| |
| 作者姓名： | 赵鸣 冯海华 |
| |
| 作者单位： | 1. 同济大学土木工程学院,上海,200092
2. 广州瀚华建筑设计有限公司,广州,510630 |
| |
| 基金项目： | 国家科技攻关计划;上海市房屋土地资源管理局资助项目 |
| |
| 摘 要： | 混凝土构件检测时,一般采用百分比抽样的方式.以回弹法中对混凝土强度进行检测时采用百分比抽样的抽样方式为例,从绝对误差限和相对误差限的角度分析了不同构件总量均采用此方法抽取样本的不合理性,并提出在不同混凝土强度等级、不同构件总数的情况下,通过控制一定的误差限来确定样本数量的方法.通过理论和实例分析,提出在抽样过程中,采用分层抽样技术对检测构件进行合理分层,降低总体方差,可减少样本数量.这种方法也适用于其它检测问题的样本容量的确定.
|
| 关 键 词： | 百分比抽样 回弹法 混凝土检测 简单随机抽样 分层抽样 |
| 修稿时间： | 2006年9月6日 |
Determination of the Sample Size for the Inspection of Concrete Members |
| |
| ZHAO Ming,FENG Hai-hua.Determination of the Sample Size for the Inspection of Concrete Members[J].Mathematics in Practice and Theory,2007,37(23):18-25. |
| |
| Authors: | ZHAO Ming FENG Hai-hua |
| |
| Abstract: | Percentage sampling is used when the concrete members are to be inspected.This paper takes the sampling method used in rebound method as an example to analyze the percentage sampling based on the maximum absolute error and the maximum relative error theory and concludes that this method is not reasonable.A method for the determination of the sample size is proposed in this paper by controlling the maximum error when the constructions have different concrete strength and different number of members;and if the stratified sampling method is used properly,the subpopulation variance will decrease and the sample size will descend consequently.This method also can be used in other aspect of inspection to determine the sample size. |
| |
| Keywords: | percentage sampling rebound method concrete inspection simple random sampling stratified sampling |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
