Evaluation of safety and the collapse mechanism caused by sudden failure of members in truss bridges

桁架桥构件突发破坏的安全性评价及倒塌机理

• 批准号: 22560490
• 负责人: KAWANISHI Naoki
• 金额: $ 2.91万
• 依托单位: Toyota National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560490/
• 关键词: トラス橋; リダンダンシー; 衝撃係数; 進行性破壊; リダンダンシー解析; 部材j破断; 腐食; 衝衝係数

The dynamic stress amplification resulting from a sudden failure of a member has a considerable influence on a progress to the overall collapse. Therefore, this dynamic effect must be included in the conventional static redundancy analysis as an impact factor. The calculated values of the impact factor vary widely from member to member. However, the impact factors for critical members in the redundancy analysis take almost a constant value that ranges from 1.4 to 1.8. In order to predict approximately the magnitude of the member impact factors without carrying out the dynamic response analysis, a simplified method based on the RMS mode combination method is proposed. The accuracy of the member impact factors calculated by this simplified method is moderate.

杆件突然破坏所引起的动应力放大对杆件整体倒塌的进程有相当大的影响。因此，在常规的静态冗余分析中，必须将这种动态效应作为影响因子。影响系数的计算值因构件而异。然而，冗余分析中关键构件的影响因子几乎取1.4到1.8之间的恒定值。为了在不进行动力响应分析的情况下近似预测构件冲击系数的大小，提出了一种基于RMS振型组合法的简化方法。用这种简化方法计算的杆件影响系数精度适中。

项目成果

すき間長さの違いが円筒鋼製橋脚の耐震性能に与える影響

间隙长度差异对圆柱形钢桥墩抗震性能的影响

• 发表时间: 2012
• 期刊: 豊田工業高等専門学校研究紀要
• 作者: 片野洋輔;中村一史;前田研一;他;北瀬昭平,杉山彰浩,鈴木森晶,水野英二;水野憲司,磯部友哉,鈴木森晶,水野英二;鈴木森晶,亀田好洋,水野英二;渡辺貴之,中村一史,前田研一,睦好宏史,松井孝洋,鈴川研二,吉田 一,柳沼謙一;亀田好洋;水野憲司;忠和男
• 通讯作者: 忠和男

Dynamic Stress Amplification Caused by Sudden Failure of Tension Members in Steel Truss Bridges

• DOI: 10.1061/(asce)st.1943-541x.0000338
• 发表时间: 2011-08
• 期刊: Journal of Structural Engineering-asce
• 作者: Y. Goto;N. Kawanishi;I. Honda

リダンダンシー解析における鋼トラス橋部材破断時の衝撃係数の特性とその推定法

冗余分析中钢桁架桥构件断裂冲击系数特征及其估算方法

• 发表时间: 2010
• 作者: 片野洋輔;中村一史;前田研一;他;北瀬昭平,杉山彰浩,鈴木森晶,水野英二;水野憲司,磯部友哉,鈴木森晶,水野英二;鈴木森晶,亀田好洋,水野英二;渡辺貴之,中村一史,前田研一,睦好宏史,松井孝洋,鈴川研二,吉田 一,柳沼謙一;亀田好洋;水野憲司;忠和男;Yoshiaki Goto;水野憲司;黒田亮;川西直樹
• 通讯作者: 川西直樹