監視データと数値シミュレーションに基づいたコンクリートボックス・バールダー・ブリッジの温度場と温度効果
Mengxiang Zhai1, Hongyin Yang1,2, Bin Li3
1School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China.
Sensors (Basel, Switzerland)
|August 28, 2025
まとめ
この研究では,モニタリングデータと有限要素モデルを使用してコンクリートボックスベアブリッジの温度を分析しました. 橋の安全性に影響を及ぼし,設計上の考慮事項を更新する必要があります.
科学分野:
- 構造工学
- 土木工学
- 材料科学
背景:
- コンクリートボックスベアブリッジの長期使用安全性は,温度フィールドの分布とその影響に決定的に依存しています.
- これらの熱的振る舞いを理解することは 構造的整合性を確保し 早期の退廃を防ぐために不可欠です
研究 の 目的:
- 長期の構造的健康モニタリングデータを用いて,武漢の曲がった連続したコンクリートボックスビールの橋の温度フィールド分布と温度効果を調査する.
- 様々な条件下で橋の温度反応を予測するための正確な有限要素モデルを確立する.
- 橋の安全性への影響,特に極端な天候を特定する.
主な方法:
- コンクリート箱梁橋からの長期構造健康モニタリングデータを使用しました.
- 特殊なソフトウェアを使用して温度フィールド解析のための有限元モデルを開発した.
- 信頼性を高めるためにモニタリングデータを消去するためにウェーブレット分析を使用した.
- 極端な天候をシミュレートした
主要な成果:
- 梁の温度と周囲の温度との間に強い相関が認められた.
- コンクリートボックスビールの太陽光線下では,垂直と横の気温の有意な差が観察されました.
- 有限要素モデルの精度は測定データに対して検証された.
- 武漢の極端な天候下で不利な垂直および横断的な温度グラデーションのモデルを確立した.
- 現在の仕様には含まれていない 網と底板の温度差を特定した.
- ピア・ベアリングの相対的な移転とボトム・スラブのストレスとベアリングの温度との間に強い相関が観察された.
結論:
- この研究では,コンクリートの箱梁橋における温度場と効果をモデル化して分析しました.
- 発見は,現在設計コードで取り扱われていない,特に網と底板で発生する特定の温度グラデーションを考慮する必要性を強調しています.
- この研究は,異なる熱条件に曝されているコンクリート箱梁橋の設計,安全性評価,および保守戦略を改善するための貴重なデータを提供します.
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