Structural redundancy/collapse analysis, dynamic analysis and structural health monitoring of steel truss bridges

钢桁架桥结构冗余/倒塌分析、动力分析及结构健康监测

• 批准号: 20360198
• 负责人: YAMAGUCHI Hiroki
• 金额: $ 11.9万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360198/
• 关键词: 維持管理工学; 鋼トラス橋; リダンダンシー; 構造健全度; 実験モード解析; 理論モード解析; モード減衰; 打撃試験; 構造工学・地震工学; 構造工学・地震工堂; 構造冗長性; 局部振動

The fracture critical members were identified by conducting the structural redundancy analysis of steel truss bridges and the effects of load-carrying capacity of concrete deck as well as member joint were investigated. The dynamic characteristics of truss bridges, classified into the global, local and coupled modes, were also clarified in detail by the experimental/theoretical modal analyses. The feasibility of vibration-based health monitoring of steel truss bridges, based on the field measurement as well as the impulse hummer test, was finally discussed by showing the fact that the damping ratios of coupled modes and the group of higher natural frequencies in local modes can be changed in identifiable amount by having local damages in truss diagonal members.

通过对钢桁架桥进行结构冗余分析，识别断裂关键构件，并研究混凝土桥面及构件节点承载能力的影响。通过实验/理论模态分析，还详细阐明了桁架桥的动力特性，分为全局模态、局部模态和耦合模态。最后通过耦合模态的阻尼比和局部模态中较高固有频率组的事实，讨论了基于现场测量和脉冲蜂鸣器试验的钢桁架桥振动健康监测的可行性。可以通过桁架斜杆的局部损坏来改变可识别的量。

项目成果

Structural health monitoring of steel truss bridges based on modal damping chanaes in local and global modes

基于局部和全局模态模态阻尼变化的钢桁架桥结构健康监测

• 发表时间: 2010
• 期刊: Proc. of 5WC on Structural Control and Monitoring
• 作者: Yoshioka T.;Yamaguchi H.;Matsumoto Y.
• 通讯作者: Matsumoto Y.

橋梁の供用時振動計測に基づくモード同定と通過交通の振動特性値への影響

基于在役桥梁振动测量的模态识别及其对过往交通振动特征值的影响

• 发表时间: 2008
• 作者: H. Yokota;M. Iwanami;E. Kato;T. Yamaji;和泉彰,山口宏樹,伊藤信,吉岡勉,松本泰尚
• 通讯作者: 和泉彰,山口宏樹,伊藤信,吉岡勉,松本泰尚

Damage assessment of truss diagonal members based on freauency chanaes in local higher modes

基于局部高阶模态频率变化的桁架斜杆损伤评估

• 发表时间: 2011
• 作者: Yoshioka T.;Takahashi M.;Yamaguchi H.;Matsumoto Y
• 通讯作者: Matsumoto Y

Damage assessment of truss diagonal members based on frequency changes in local higher modes

基于局部高阶模态频率变化的桁架斜杆损伤评估

• 发表时间: 2011
• 作者: Yoshioka T.;Takahashi M.;Yamaguchi H.;Matsumoto Y.
• 通讯作者: Matsumoto Y.

Structural health monitoring of steel truss bridges based on modal damping changes in local and global modes

基于局部和全局模态模态阻尼变化的钢桁架桥结构健康监测

• 发表时间: 2010
• 期刊: Proc. of 5th World Conf. on Structural Control and Monitoring, MAA
• 作者: Yoshioka T.;Yamaguchi H.;Matsumoto Y.
• 通讯作者: Matsumoto Y.