Study on Energy-Based Damping Evaluation of Structural Systems

结构系统能量阻尼评估研究

• 批准号: 12450180
• 负责人: YAMAGUCHI Hiroki
• 金额: $ 5.57万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450180/
• 关键词: Modal Damping; Energy-Based Evaluation; Cable-Stayed Bridge; Girder Bridge; Cable System; Middle-Rise Building; ERA; Substructural Synthesis; 構造システム; 減衰; エネルギー評価; 合成2主桁橋; 減衰マトリックス; 2主桁橋; 制震ビル

The main objective of this study is to develop an energy-based method for evaluating damping characteristics of structures with special reference to sub-structural interaction. The main parts of the present study are summarized as follows.1. The coupled cable-vibration characteristics and its effect on the modal damping characteristics have been investigated for long-span cable-stayed bridges by conducting the experimental modal analysis based on ERA, the theoretical modal analysis based on FEM, and the damping analysis based on sub-structural synthesis for the Tatara Bridge.2. A explicit formula for modal damping of girder bridge has been derived by applying the energy-based evaluation method with an assumption of girder's internal damping and support's friction damping, and its validity has been checked with field vibration data as well as a model experiment data. The damping mechanism of girder bridges has been also clarified by evaluatin damping contributions of substructures such as concrete slab and steel main girder in 2-girders and 4-girders bridges.3. The energy-based damping analysis of a cable system model consisting of two identical cables with a secondary cable was conducted and the results were compared with the experimental ones. It is concluded that the modal damping of system can be made higher by means of internal resonance among substructures.4. Robust performance of hysteretic dampers, used in controlling mid-rise buildings, against change of earthquake characteristics is investigated by introducing an energy-based damper performance index. It is found out that, besides the effect of maximum energy input on damper efficiency, othertime dependant properties as energy-based effective duration and earthquake dominant period have great influence on the damper efficiency.5. A general method for evaluating a damping matrix of structure has been studied by considering an equivalent complex stiffness matrix but is still under investigation.

这项研究的主要目的是发展一种基于能量的方法来评估结构的减振特性，特别是参考子结构相互作用。本研究的主要内容概括如下：1。通过对塔塔拉大桥进行基于ERA的试验模态分析、基于有限元的理论模态分析和基于子结构综合的减振分析，研究了大跨度斜拉桥的索振耦合特性及其对模态减振特性的影响。在假定梁的内耗和支座的摩擦阻尼力的前提下，应用基于能量的评估方法，推导出了梁桥模态阻尼的显式计算公式，并用现场振动数据和模型试验数据验证了公式的正确性。通过评估二梁桥和四梁桥中混凝土板、钢主梁等子结构的减振贡献，阐明了梁式桥的减振机理。对由两根相同的拉索和一根二次索组成的索系模型进行了基于能量的阻尼力分析，并与实验结果进行了比较。分析结果表明，通过子结构间的内共振可以提高系统的模态阻尼值。通过引入基于能量的阻尼器性能指标，研究了用于控制中高层建筑的滞回阻尼器在地震作用下的稳健性能。研究发现，除了最大能量输入对阻尼器效率的影响外，基于能量的有效持续时间和地震优势周期等其他时变特性对阻尼器的效率也有很大的影响。考虑等效复刚度阵的结构阻尼阵的一般计算方法已被研究，但仍在研究中。

项目成果

H.Yamaguchi, T.Nishimura, K.Tsutsumi, K.Yamaguchi: "Damping effect of coupled cable vibration in a cable-stayed bridge"Proc.of the 4th International Symposium on Cable Dynamics,Montreal. 153-160 (2001)

H.Yamaguchi、T.Nishimura、K.Tsutsumi、K.Yamaguchi：“斜拉桥耦合索振动的阻尼效应”第四届国际索动力学研讨会论文集，蒙特利尔。

長尾拓,山口宏樹,松本泰尚: "桁橋の減衰特性と支承摩擦の影響に関する理論的考察の試み"第55回年次学術講演会講演概要集,土木学会. I-B75-1-I-B75-2 (2000)

Taku Nagao、Hiroki Yamaguchi、Yasunao Matsumoto：“尝试从理论上考虑梁桥阻尼特性和承载摩擦的影响”第 55 届学术会议摘要，日本土木工程师学会 I-B75-1-I- B75-2（ 2000)

Yamaguchi H., El-Abd A.: "Effect of earthquake energy input characteristics on hysteretic damper efficiency"Earthquake Engineering & Structural Dynamics. Vol.32. 827-843 (2003)

Yamaguchi H.，El-Abd A.：“地震能量输入特性对迟滞阻尼器效率的影响”地震工程

Yamaguchi, H., Nishimura, T., Tsutsumi, K. & Yamaguchi, K.: "Damping effect of coupled cable vibration in a cable-stayed bridge"Proc. of 4th Int. Symp. on Cable Dynamics, Montreal. 153-160 (2001)

山口，H.，西村，T.，堤，K.

Yamaguchi H., El-Abd A.: "Effect of earthquake energy input characteristics on hysteretic damper efficiency"Earthquake Engineering & Structural Dynamics. Vol.32(on-line publication). (2003)

Yamaguchi H.，El-Abd A.：“地震能量输入特性对迟滞阻尼器效率的影响”地震工程