Retrofitting Method for Existing Orthotropic Steel Deck

Ono, Shin-ichi; Shimozato, Tetsuhiro; Masui, Takashi; Machida, Fumitaka; Miki, Chitoshi

doi:10.2208/jscej.2005.801_213

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…Spectral image processing has been applied to the study of a various of emission sources, such as electrical arc discharges and inductively coupled plasmas. [10][11][12][13][14][15][16][17][18] Various methods have been used to obtain the desired spectral band-pass including imaging through a simple band-pass filter, both multislit and slitless spectrometers, and a monochromator. [10][11][12][13][14][15][16][17][18] In this study, a two-dimensional (2D) gas temperature distribution in a positive DC glow corona was qualitatively measured by spectral image processing using a gated ICCD camera with ultranarrow band-pass filters corresponding to the head and tail of 2PS N 2 .…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14][15][16][17][18] Various methods have been used to obtain the desired spectral band-pass including imaging through a simple band-pass filter, both multislit and slitless spectrometers, and a monochromator. [10][11][12][13][14][15][16][17][18] In this study, a two-dimensional (2D) gas temperature distribution in a positive DC glow corona was qualitatively measured by spectral image processing using a gated ICCD camera with ultranarrow band-pass filters corresponding to the head and tail of 2PS N 2 . The changes in the gas temperature distribution in a positive DC glow corona due to the amplitude of the applied voltage and pressure of atmosphere gas were also investigated.…”

Section: Introductionmentioning

confidence: 99%

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Qualitative gas temperature distribution in positive DC glow corona using spectral image processing in atmospheric air

Matsumoto

Inada

Shimizu

et al. 2014

Jpn. J. Appl. Phys.

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An experimental method of determining a qualitative two-dimensional image of the gas temperature in stationary atmospheric nonthermal plasma by spectral image processing was presented. In the experiment, a steady-state glow corona discharge was generated by applying a positive DC voltage to a rod-plane electrode in synthetic air. The changes in the gas temperature distribution due to the amplitude of applied voltage and the ambient gas pressure were investigated. Spectral images of a positive DC glow corona were taken using a gated ICCD camera with ultranarrow band-pass filters, corresponding to the head and tail of a N2 second positive system band (0–2). The qualitative gas temperature was obtained from the emission intensity ratio between the head and tail of the N2 second positive system band (0–2). From the results, we confirmed that the gas temperature and its distribution of a positive DC glow corona increased with increasing applied voltage. In particular, just before the sparkover voltage, a distinctly high temperature region was formed in the positive DC glow at the tip of the rod electrode. In addition, the gas temperature decreased and its distribution spread diffusely with decreasing ambient gas pressure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Qualitative gas temperature distribution in positive DC glow corona using spectral image processing in atmospheric air

Matsumoto

Inada

Shimizu

et al. 2014

Jpn. J. Appl. Phys.

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“…Quite a few investigations on durability evaluation on root-deck crack have been carried out by various organizations. For example, full-scale specimens, consisted of one or two panel decks, were tested under static loading 5) , or were fatigue-tested under fixed loading 6) or moving wheel loading 7),8),9),10), 11) . Finite element analyses were also carried out for the full-scale models to correlate local stresses and fatigue cracks.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Durability Evaluation of Trough to Deck Plate Welded Joint of Orthotropic Steel Deck

Yamada

2008

JSCE JOURNAL OF STRUCTURAL AND EARTHQUAKE ENGINEERING

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The present study is intended as analysis investigations of fatigue durability of the trough to deck plate welded joint failed at weld root in deck plate. The investigations are carried out on the basis of three key factors: fatigue strengths of the welded details obtained by analysis method in conjunction with fatigue tests, stress ranges by FEM analyses with a unit wheel load, and the loads and their frequencies for the fatigue evaluations are the wheel loads in service, represented by an equivalent wheel load, assumed from the axle load measurements. Consistency between fatigue strength and stress range is simply demonstrated. Using this method for fatigue evaluation, it is found that large-rib-deck model has longer fatigue life than standard-deck models. An increase in deck plate thickness may prolong fatigue life of the orthotropic steel deck. Load distribution due to the rigidity of pavement may also help enhancement the fatigue life.

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Fatigue Properties and Retrofitting of Existing Orthotropic Steel Bridge Decks

Ono¹,

Hirabayashi²,

Shimozato³

et al. 2009

JSCE JOURNAL OF STRUCTURAL AND EARTHQUAKE ENGINEERING

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2 正会員首都高速道路株式会社(〒100-8930 東京都千代田区霞ヶ関 1-4-1) 3 正会員琉球大学工学部(前首都高速道路株式会社)(〒903-0213 沖縄県西原町千原 1 番地) 4 正会員株式会社高速道路総合技術研究所(〒194-8508 東京都町田市忠生 1-4-1) 5 正会員財団法人首都高速道路技術センター(〒105-0001 東京都港区虎ノ門 3-10-11) 6 フェロー東京工業大学教授(〒152-8550 東京都目黒区大岡山 2-12-1) 既設鋼床版のデッキプレートと閉断面リブの溶接部から生じる疲労損傷は，通行車両への悪影響が直接的に及ぶことが懸念されることから火急な対策が求められている．鋼床版の疲労耐久性向上策を検討するにあたり，既設鋼床版の疲労挙動を明らかにする必要がある．一方で，鋼床版の疲労耐久性向上策としては，鋼床版のデッキプレート上に薄層の鋼繊維補強コンクリートを敷設する工法が提案されている．そこで本研究は，実物大モデルの鋼床版試験体を用いた輪荷重疲労試験を行い，既設鋼床版の疲労挙動を明らかにするとともに，鋼繊維補強コンクリート敷設工法を適用した補強鋼床版の疲労強度改善効果を検討したものである．

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Retrofitting Method for Existing Orthotropic Steel Deck

Cited by 6 publications

References 4 publications

Qualitative gas temperature distribution in positive DC glow corona using spectral image processing in atmospheric air

Qualitative gas temperature distribution in positive DC glow corona using spectral image processing in atmospheric air

Fatigue Durability Evaluation of Trough to Deck Plate Welded Joint of Orthotropic Steel Deck

Fatigue Properties and Retrofitting of Existing Orthotropic Steel Bridge Decks

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