STRUCTURAL EVALUATION METHOD OF TRANSVERSE JOINT OF CONCRETE PAVEMENT CONSIDERING DEGRADATION PROCESS

DOI Web Site 2 Citations
  • NISHIZAWA Tatsuo
    石川工業高等専門学校 環境都市工学科
  • WAKABAYASHI Yuya
    国土交通省 大臣官房 技術調査課（元：国立研究開発法人土木研究所 道路技術研究グループ 舗装チーム）
  • UCHIDA Masataka
    国立研究開発法人土木研究所 道路技術研究グループ 舗装チーム
  • YABU Masayuki
    国立研究開発法人土木研究所 道路技術研究グループ 舗装チーム

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Other Title
  • コンクリート舗装横目地の劣化過程を考慮した逆解析による健全度評価手法の開発

Abstract

 Effective maintenance of concrete pavement requires precise evaluation of load transfer at transverse joint. The load transfer is evaluated from the load transfer efficiency (LTE) that is simply calculated from deflections at loaded and unloaded slabs. In this study, FWD deflections are simulated for various elastic moduli of pavement layers in the degradation process with three dimensional finite element models (3DFEM) to create a database of FWD deflection. If a set of FWD deflections measured at a joint is given, the layer moduli and degradation stage of the joint can be identified from the database. The result of the back-calculation helps engineers to determine a proper rehabilitation measure. The method was validated on a 15 year old concrete pavement. The validation revealed the possibility that the degradation stage of a joint can be detected directly from LTE and measured deflections without the backcalculation. It was also investigated how the degree of joint degradation affects the stress of concrete slab.

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