Optimization of Earthquake Energy Partitioning in Base Isolated and Dynamically Damped Structures

基础隔震动力阻尼结构地震能量分配优化

• 批准号: 63550336
• 负责人: IEMURA Hirokazu
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550336/
• 关键词: Earthquake Energy; Partioning; Optimization; Base Isolation; Dynamic Damper; Active Control; Flexible Structure; Offshore Structure; 免振構造; 免震構造物; 制震構造物; 地震エネルギー; スペクトル; アクティブコントロール; エネルギー消費

Earthquake input energy and its partitioning in structures have been studied to develop a new approach for earthquake damage assessment. Earthquake input energy, which includes both intensity and duration of ground motion is expected to represent earthquake damage more accurately than the conventional instantaneous maximum responses. In the first part of this study, the new earthquake energy spectra are proposed for practical design procedures. The spectra show integrated earthquake input energy of a unit mass with given natural period and damping ratio. Mathematical formulation is presented for evaluation of the total input energy and its partitioning in complex structures by applying the modal analysis and the proposed energy spectra. In the second part, numerical simulations are carried out for inelastic structures to show earthquake energy partitioning in time and in space. Effects of inelastic restoring forces of base isolators and of tuned mass dampers to earthquake response of structures are evaluated for practical design with structural controls.

研究了地震输入能量及其在结构中的分配问题，为震害评估提供了一种新的方法。地震动输入能量包括地震动的强度和持续时间，它比传统的瞬时最大反应更能准确地反映地震的破坏。在本研究的第一部分，新的地震能量谱提出了实际的设计程序。该反应谱反映了给定自振周期和阻尼比的单位质量的地震输入能量。提出了一种利用模态分析和能量谱方法计算复杂结构总输入能量及其分配的数学公式。在第二部分中，对非弹性结构进行了数值模拟，以显示地震能量在时间和空间上的分配。为实际的结构控制设计，评估了基础隔震器和调谐质量阻尼器的非弹性恢复力对结构地震反应的影响。

项目成果

Iemura, H.: "Control of Earthquake Energy Partitioning in Base Isolated and Dynamically Damped Structures," Proceedings of 9th World Conference on Earthquake Engineering, Vol V, pp. 645-650, 1988.

Iemura, H.：“基础隔离和动态阻尼结构中地震能量分配的控制”，第九届世界地震工程会议论文集，第五卷，第 645-650 页，1988 年。

山田善一: "PhaseーDelayed Active Control of Structures under Random Earthquake Motion" Proceedings of 4th United States National Conference on Earthquake Engineerings,Palm Springs. (1990)

Zenichi Yamada：“随机地震运动下结构的相延迟主动控制”第四届美国全国地震工程会议论文集，棕榈泉（1990 年）。

伊津野和行 他: Natural Disaster Science. 9ー2. (1988)

Kazuyuki Itsuno 等：自然灾害科学 (1988)。

家村浩和(他共著): "土木工学ハンドブック第1巻" 技報堂出版, 1500 (1989)

Hirokazu Iemura（与他人合着）：《土木工程手册第 1 卷》Gihodo Publishing，1500（1989）

家村浩和: "Control of Earthquake Energy Partitioning in Base Isolated and Dynamically Damped Structures" Proceedings of 9th World Conference on Earthquake Engineering. 5. 645-650 (1988)

Hirokazu Iemura：“基础隔离和动态阻尼结构中地震能量分配的控制”第九届世界地震工程会议论文集 5. 645-650 (1988)。