能量等效大跨屋盖结构三分量多目标等效静力风荷载

李玉学1,2,3,冯励睿1,李海云1,2,3,田玉基4

振动与冲击 ›› 2022, Vol. 41 ›› Issue (9) : 276-282.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (9) : 276-282.
论文

能量等效大跨屋盖结构三分量多目标等效静力风荷载

  • 李玉学1,2,3,冯励睿1,李海云1,2,3,田玉基4
作者信息 +

Energy equivalent long-span roof structure three-component multi-objective equivalent static wind load

  • LI Yuxue1,2,3, FENG Lirui1, LI Haiyun1,2,3, TIAN Yuji4
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摘要

针对大跨屋盖结构风效应静力等效分析中需要考虑多响应目标问题,与脉动风振响应背景分量、共振分量及其二者耦合项分量(简称三分量)相对应,提出一种大跨屋盖结构三分量多目标等效静力风荷载分层分析方法。首先,基于能量等效,考虑结构所有节点响应,分别推导了三分量多目标等效静力风荷载表达式。其次,根据三分量响应能量对脉动风振总响应能量的贡献程度,定义三分量能量贡献系数,据此系数实现大跨屋盖结构三分量响应层次划分,并针对不同层次结构,制定了相应的总等效静力风荷载组合求解方法。最后,以北京奥林匹克公园网球中心赛场屋盖结构为例,对其三分量响应层次划分,根据划分结果,组合得到结构总等效静力风荷载,同时对总等效静力风荷载作用下的结构静力响应与频域分析所得目标响应进行对比,发现二者吻合较好,能够满足实际工程要求,说明所提方法有效且具有工程应用价值。

Abstract

Aiming at the problem of multiple target response need to be considered in the equivalent static wind load analysis for large-span roofs, corresponding to the wind-induced response of background component, resonance component and their coupling term(referred to as three-component),a stratified method for analyzing multiple target equivalent static wind load of large-span roofs is proposed. Firstly, based on energy equivalence and considering the all nodes response of the structure, the three-component multiple target equivalent static wind load expressions are deduced. Secondly, according to the contribution of the three-component response energy to the total response energy, the three-component energy contribution coefficient is defined, then, the three-component response hierarchical division of large-span roofs is realized, and for different hierarchical of the structure, the corresponding total equivalent static wind load combination method is formulated. Finally, taking the Beijing Olympic green tennis center stadium roof as an example, the three-component response hierarchical is divided. According to the division result, the total equivalent static wind load of the structure is combined, on this basis, the static response induced by the total equivalent static wind load is compared with the target response obtained from the frequency domain analysis, and founding the two are in good agreement, which indicate that the proposed method is effective and has engineering application value.

关键词

大跨屋盖结构 / 等效静力风荷载 / 多目标 / 能量等效 / 三分量

Key words

large-span roofs / equivalent static wind load / multiple target / energy equivalence / three-component

引用本文

导出引用
李玉学1,2,3,冯励睿1,李海云1,2,3,田玉基4. 能量等效大跨屋盖结构三分量多目标等效静力风荷载[J]. 振动与冲击, 2022, 41(9): 276-282
LI Yuxue1,2,3, FENG Lirui1, LI Haiyun1,2,3, TIAN Yuji4. Energy equivalent long-span roof structure three-component multi-objective equivalent static wind load[J]. Journal of Vibration and Shock, 2022, 41(9): 276-282

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