| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2013-02-26 |
| タイトル |
|
|
タイトル |
Nondestructive technique for estimating crack positions in a concrete structure by subtraction of the surface-wave component |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Nondestructive measurement |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Elastic wave |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Multiple sensors |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Beamforming |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Murakami, Takeshi
Fujioka, Toyota
Nagata, Yoshifumi
Abe, Masato
|
| 著者(機関) |
|
|
値 |
Faculty of Engineering, Iwate University |
| 登録日 |
|
|
日付 |
2013-02-26 |
| 書誌情報 |
Acoustical Science and Technology
巻 28,
号 5,
p. 310-318,
発行日 2007-01-01
|
| ISSN |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1346-3969 |
| Abstract |
|
|
内容記述タイプ |
Other |
|
内容記述 |
In this paper, we describe a method for estimating a crack position in a concrete structure using several accelerometers. An array of accelerometers is attached to the concrete structure and an impact is made on the concrete surface using a small impulse hammer. A reflection wave is generated from the crack position if a crack exists. Conventional methods for estimating the reflection point might seem to be useful for the detection of cracks. Because the concrete structure is elastic, however, it has three wave-propagation modes: the surface-wave mode, the primary-wave mode, and the secondary-wave mode. We cannot estimate the position using conventional methods because the necessary primary-wave mode is weaker than the surface-wave mode. To estimate the crack position precisely, we have already proposed two methods for eliminating the surface-wave and side-wall reflections. However, elimination using those methods was insufficient because they sometimes indicated a peak at a position where no crack existed. Therefore, in this paper, we propose a new method for estimating the surface wave more precisely to suppress such peaks. Some experiments were carried out, yielding better results. |
| 出版者 |
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|
出版者 |
The Acoustical Society of Japan |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1250/ast.28.310 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
ast-v28n5p310-318.pdf (748.8 kB)
