| 等效静力风荷载背景和共振之间的耦合效应 |
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| 引用本文： | 柯世堂,王法武,周奇,周志勇,赵林. 等效静力风荷载背景和共振之间的耦合效应[J]. 土木建筑与环境工程, 2013, 35(6): 112-117 |
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| 作者姓名： | 柯世堂 王法武 周奇 周志勇 赵林 |
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| 作者单位： | 南京航空航天大学 土木工程系，南京 210016；汕头大学 风洞实验室, 广东 汕头 515063;南京航空航天大学 土木工程系，南京 210016;汕头大学 风洞实验室, 广东 汕头 515063;同济大学 土木工程防灾国家重点实验室,上海 200092;同济大学 土木工程防灾国家重点实验室,上海 200092 |
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| 基金项目： | 国家自然科学基金（51208254）；江苏省自然科学基金（BK2012390）；广东省高校结构与风洞重点实验室开放课题；中央高校基本科研业务费(NN2012024,56YAH12010） |
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| 摘 要： | 在结构动力学和随机振动理论基础上，推导出结构脉动风总响应的实际理论组合公式，首次定义了耦合恢复力协方差矩阵这一参数，提出用于补偿背景和共振分量之间耦合项的一致耦合方法（CCM）来求解结构的总风致响应，并赋予等效静风荷载背景和共振耦合项以明确的物理含义。以某大跨屋盖结构为例，采用CCM法进行风致响应和等效静风荷载计算，通过与全模态完全二次型组合（CQC）计算结果进行对比分析，深入揭示了背景和共振耦合项的作用机理，验证了本文方法的高精度和有效性，为此类结构风致响应和等效静风荷载的精确求解和机理研究提供新的思路。
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| 关 键 词： | 风致响应；等效静风荷载；大跨屋盖结构；一致耦合方法；背景和共振耦合分量 |
Coupling Effect Analysis Between Background and Resonant Components for Equivalent Static Wind Loadings |
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| Ke Shitang,Wang Fawu,Zhou Qi,Zhou Zhiyong and Zhao Lin. Coupling Effect Analysis Between Background and Resonant Components for Equivalent Static Wind Loadings[J]. Journal of Civil,Architectrual & Environment Engineering, 2013, 35(6): 112-117 |
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| Authors: | Ke Shitang Wang Fawu Zhou Qi Zhou Zhiyong Zhao Lin |
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| Affiliation: | Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China; Wind Tunnel Laboratory, Shantou University, Shantou 515063, Guangdong, P.R.China;3.;Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China;Wind Tunnel Laboratory, Shantou University, Shantou 515063, Guangdong, P.R.China;3.;State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, P.R.China;State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, P.R.China |
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| Abstract: | Aimed at the limitations of total fluctuating wind-induced response with combination of background and resonant components using Square Root of the Sum of Squares (SRSS) method, the theoretical combination formulas of fluctuating wind-induced responses and ESWLs are derived based on structural dynamics and random vibration theory. Meanwhile, the refined analysis method is firstly presented by four components formula to compensate the coupling component between background and resonant modes. The proposed procedure avoids the integration process of calculating elastic restoring force and completely considers the modal coupling effects, which can be used to calculate the ESWL for any complex structures. Taking the steel grid roof structure of a large museum as an example, the new method was used to calculate its wind-induced response. Compared with results of complete quadratic combination (CQC), the effectiveness and accuracy of the present approach has been revealed. |
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| Keywords: | wind-induced response ESWLs large spatial structure tri-components method CCM coupling item |
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