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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

29卷

期数:

2012年02期

页码:

102-110

栏目:

出版日期:

2012-06-30

文章信息/Info

Title:

Experiment on Void Area Testing of Concrete-filled Steel Tube Based on Ultrasonic Testing Method

作者:

檀永杰¹,徐波²,吴智敏¹,何化南¹

1. 大连理工大学 土木工程学院,辽宁 大连 116024; 2. 大连市建设工程质量监督站,辽宁 大连 116012

Author(s):

TAN Yong-jie¹, XU Bo², WU Zhi-min¹, HE Hua-nan¹

1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. Dalian Construction Engineering Quality Supervision Station, Dalian 116012, Liaoning, China

关键词:

钢管混凝土;  脱空区;  定量检测;  超声对测法;  首波路径;  色谱图

Keywords:

concrete-filled steel tube;  void area;  quantitative testing;  ultrasonic testing method;  propagation path;  chromatogram

分类号:

TU317

DOI:

-

文献标志码:

A

摘要:

分析了超声波对测法在钢管混凝土脱空区4种可能的超声首波传播路径,并给出了4种传播路径的声时理论计算公式。通过试验得到了实际传播声时,并与由声时公式计算的理论值对比,得到了在2种脱空区范围内超声首波的传播路径,即沿绕射脱空缺陷传播,为超声对测法定量检测脱空区范围提供了条件; 通过MATLAB的内插函数,将对测法得到的测区内各离散测点超声首波声时矩阵进行处理,得到整个测区的钢管混凝土脱空信息,基于此绘出脱空区声时分布色谱图,以达到定量检测的效果。最后给出了超声对测法适用的脱空缺陷对应的圆心角范围。结果表明:基于超声对测法的声时分布色谱图达到定量检测缺陷的目的,且满足工程精度要求。

Abstract:

Four possible propagation paths in the disengaging by ultrasonic testing method for void area of concrete-filled steel tube were analyzed, and the theoretical calculation formulae of ultrasonic travel time for four propagation paths were given. From the comparisons between the experimental values and the theoretical values, the real propagation paths in the two kinds of disengaging were obtained, which provided the conditions for the quantitative test of the disengaging. With the interpolation function from MATLAB, matrix of ultrasonic travel time of the disengaging would be disposed, and the disengaging of the concrete-filled steel tube was got. Then the chromatogram of ultrasonic travel time distribution was drawn and it could be used for quantitative analysis. Finally, the applicable range of the central angle with the ultrasonic testing method was proposed. Results show that the chromatogram of ultrasonic travel time distribution based on ultrasonic testing method can reach the purposes of quantitative detection defects and can meet accuracy requirements of the project.

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备注/Memo

备注/Memo:

收稿日期:2011-12-23
作者简介:檀永杰(1986-),男,河北石家庄人,工学硕士研究生,E-mail:tyjsjz@163.com。

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更新日期/Last Update: 2012-06-20