| 地震作用下多层剪切型组合结构的合理综合阻尼比取值探讨 |
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| 引用本文： | 陈相成,闫维明,李洪泉,彭凌云.地震作用下多层剪切型组合结构的合理综合阻尼比取值探讨[J].震灾防御技术,2016,11(2):283-296. |
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| 作者姓名： | 陈相成 闫维明 李洪泉 彭凌云 |
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| 作者单位： | （北京工业大学 工程抗震与结构诊治北京市重点实验室，北京 100124）,（北京工业大学 工程抗震与结构诊治北京市重点实验室，北京 100124）,（北京工业大学 工程抗震与结构诊治北京市重点实验室，北京 100124）,（北京工业大学 工程抗震与结构诊治北京市重点实验室，北京 100124） |
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| 基金项目： | 国家自然科学基金（51478023）；北京市教育委员会科技计划面上项目（KM20110005021） |
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| 摘 要： | 对于组合结构,提出了一种新的基于单元瑞利阻尼模型的应变能振型阻尼比,并证明了其在特定整体阻尼矩阵下与强迫解耦法的等价性;推导了具有明确理论依据的综合阻尼比计算公式,并基于相应的应变能振型阻尼比得出了结构的刚度综合阻尼比和瑞利综合阻尼比。分别采用复振型分解法和振型分解法对算例结构进行了地震荷载作用下的弹性时程分析,结果表明,瑞利综合阻尼比对于以剪切变形为主的多层组合结构具有良好的计算精度和适用性。
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| 关 键 词： | 组合结构 应变能阻尼 复振型分解法 瑞利综合阻尼比 |
| 收稿时间： | 2016/3/17 0:00:00 |
Discussion of the Reasonable General Damping Ratio of Multilayer Shearing Type Composite Structure under Seismic Action |
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| Chen Xiangcheng,Yan Weiming,Li Hongquan and Peng Lingyun.Discussion of the Reasonable General Damping Ratio of Multilayer Shearing Type Composite Structure under Seismic Action[J].Technology for Earthquake Disaster Prevention,2016,11(2):283-296. |
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| Authors: | Chen Xiangcheng Yan Weiming Li Hongquan and Peng Lingyun |
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| Institution: | (Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China),(Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China),(Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China) and (Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China) |
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| Abstract: | We proposed a new type strain-energy modal damping ratio based on the element Rayleigh damping model, and proved its consistency with the forced decomposition method under the specified structure damping matrix. We also derived a calculating formula of general damping ratio with clear theoretical foundation and educed the stiffness general damping ratio and Rayleigh general damping ratio based on the corresponding strain-energy modal damping ratio. The time-history analysis of example structures with complex decomposition method and mode superposition method under seismic load are carried out, and the results show that the Rayleigh general damping ratio has a good calculation accuracy and applicability with normal multi-story composite structures dominated by shearing deformation. |
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