FUNDAMENTAL STUDY ON STRUCTURAL EVALUATION OF ASPHALT PAVEMENT USING IMPACTING TECHNIQUE

打撃音および打撃力に基づくアスファルト舗装の構造評価に関する基礎的研究

In this study, the authors propose a simple method for structural evaluation of asphalt pavement based on impact sound as well as impact force. First of all, characteristics of impact force and impact sound are investigated on model pavement. As a result, it is found that peak frequencies are related to subgrade elasticity and impedance of impact force has linear relationship with the averaged elasticity up to some depth. Finally on the basis of parametric analysis using FEM (finite element method) analysis, it is also found that the square root of elasticity of subgrade has linear relationship with peak frequencies. Thus by combing the analyses of impact sound and impact force, it can be said that simple evaluation can be attained.　本研究では，途上国などで利用される比較的薄い層を有するアスファルト舗装を対象として，インパクトハンマを用いた簡易的な構造評価に関する基礎的な検討を行った．ここでは，まず実際の舗装を模擬したモデル舗装に対して打撃試験を行い，ハンマによる打撃音および打撃力の特性と舗装の剛性との関係について明らかにした．その結果，打撃音の卓越周波数は路床剛性の影響を強く受けること，また打撃力の機械インピーダンス比がある深さまでの平均的な舗装剛性と線形的な関係にあることが明らかとなった．次に，有限要素法を用いたパラメトリック解析を行った結果，打撃音の卓越周波数が路床の弾性係数の平方根と線形的な関係があることが明らかとなった．以上より，打撃力および打撃音の評価を合わせることで，舗装剛性の簡易的な評価が可能であることが示せた．

• Record URL:
  https://doi.org/10.2208/jscejpe.69.I_159
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=FUNDAMENTAL+STUDY+ON+STRUCTURAL+EVALUATION+OF+ASPHALT+PAVEMENT+USING+IMPACTING+TECHNIQUE&author=S.+HENG&author=Y.+Oshima&author=H.+Kawano&publication_year=2013
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/21856559
• Authors:
  • HENG, Salpisoth
  • Oshima, Yoshinobu
  • Kawano, Hirotaka
• Publication Date: 2013

Language

• English
• Japanese

Media Info

• Media Type: Web
• Pagination: pp I_159-I_166
• Serial:
  • Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)
  • Volume: 69
  • Issue Number: 3
  • Publisher: Japan Society of Civil Engineers
  • ISSN: 2185-6559
  • Serial URL: https://www.jstage.jst.go.jp/browse/jscejpe/-char/en

Subject/Index Terms

• TRT Terms: Asphalt pavements; Evaluation and assessment; Finite element method; Impact; Subgrade (Pavements)
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I30: Materials;

Filing Info

• Accession Number: 01545336
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Nov 26 2014 3:05PM