Enhancing Seismic Resilience of Bridges by Using Novel Shape Memory Alloy (SMA) Devices Combined with Conventional Damping Mechanisms

使用新型形状记忆合金 (SMA) 器件结合传统阻尼机制增强桥梁的抗震能力

• 批准号: 20K14811
• 负责人: 項 乃亮
• 金额: $ 2.5万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K14811/
• 关键词: Conventional dissipation; Residual deformation; Self-centering; Seismic resilience; Bridge structures; Bridge Infrastructure; Shape Memory Alloys; Conventional Damping; Seismic Devices; Seismic Resilience

As the first stage of this research project, the seismic performance of conventional energy dissipation components in bridges was evaluated, including yielding steel dampers, friction dampers, and viscous dampers and sliding elastomeric bearings. The deficiencies of such dissipative components in terms of residual displacement/deformation were identified. The results indicate that conventional dissipative members are effective in dissipating seismic energy by displaying wide hysteresis, but result in excessive residual displacements that are unfavorable to post-earthquake performance of bridges. Therefore, the incorporation of SMAs as critical self-centering members to conventional dissipative members is essential to improve the seismic resilience of bridges.

作为该研究项目的第一阶段，评估了桥梁中常规耗能构件的抗震性能，包括屈服钢阻尼器、摩擦阻尼器、粘性阻尼器和滑动弹性支座。确定了这种耗散组件在残余位移/变形方面的缺陷。结果表明，常规耗散构件通过表现出较宽的滞后作用，可以有效地耗散地震能量，但会导致残余位移过大，不利于桥梁的震后性能。因此，将 SMA 作为关键的自定心构件纳入传统耗散构件对于提高桥梁的抗震能力至关重要。

项目成果

Seismic Damage Analysis of A Large-Scale Cable-Stayed Steel Bridge Using Precise Shell Models and Supercomputing

使用精确壳模型和超级计算对大型斜拉钢桥进行地震损伤分析

• 发表时间: 2020
• 作者: Xiang;Nailiang
• 通讯作者: Nailiang

Effect of bonding or unbonding on seismic behavior of bridge elastomeric bearings: lessons learned from past earthquakes in China and Japan and inspirations for future design

• DOI: 10.1186/s43251-021-00036-9
• 发表时间: 2021-02
• 期刊: Advances in Bridge Engineering
• 作者: N. Xiang;Y. Goto;M. Alam;Jianzhong Li