| 预应力双层柱面网壳的风振响应与整体风振系数研究 |
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| 引用本文： | 周臻,孟少平,吴京.预应力双层柱面网壳的风振响应与整体风振系数研究[J].工程力学,2011(10). |
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| 作者姓名： | 周臻 孟少平 吴京 |
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| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室;东南大学城市工程科学国际研究中心; |
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| 基金项目： | 江苏省自然科学基金项目(BK2010428); 教育部博士点新教师基金项目(20090092120017) |
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| 摘 要： | 基于时域分析方法对预应力双层柱面网壳结构的风振响应进行研究,采用Welch谱分析法对谐波叠加法与线性滤波技术(AR法)模拟得到的脉动风速时程进行功率谱精度评价;分析了预应力双层柱面网壳的矢跨比、跨度、厚度、长宽比、支座弹性刚度、预应力取值等结构参数对结构风振响应的影响,结果表明:网壳的矢跨比、跨度、长宽比是影响预应力双层柱面网壳结构风振响应的主要因素;预应力拉索有效地减小了结构的脉动风响应,但由于平均风响应同时也大幅减小,其位移风振系数仍较普通网壳结构大。基于包络的概念,采用以最大动响应和最大平均风响应为控制指标的整体风振系数计算方法,研究了常见设计参数情况的预应力双层柱面网壳结构整体风振系数,可为预应力双层柱面网壳的抗风设计提供实用方法。
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| 关 键 词： | 双层柱面网壳 风振响应 时域分析 风振系数 预应力 |
THE WIND-INDUCED RESPONSE AND GLOBAL WIND VIBRATION COEFFICIENT OF PRESTRESSED DOUBLE-LAYER CYLINDRICAL RETICULATED SHELLS |
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| ZHOU Zhen,MENG Shao-ping,WU Jing.THE WIND-INDUCED RESPONSE AND GLOBAL WIND VIBRATION COEFFICIENT OF PRESTRESSED DOUBLE-LAYER CYLINDRICAL RETICULATED SHELLS[J].Engineering Mechanics,2011(10). |
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| Authors: | ZHOU Zhen MENG Shao-ping WU Jing |
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| Affiliation: | ZHOU Zhen1,2,MENG Shao-ping1,WU Jing1,2(1.Key Laboratory of Concrete & Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing,Jiangsu 210096,China,2.International Institute for Urban Systems Engineering,China) |
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| Abstract: | The wind-induced response of prestressed double-layer cylindrical reticulated shells is researched based on the time-domain analytical method.The Welch spectrum analysis method is presented to evaluate the power spectrum accuracy of the fluctuating wind speed time-history simulated by the harmony superposition method and linear filter technique(AR method).The influence of structural design parameters on the wind-induced response is investigated,including rise-span-ratio,span,thickness,length-width-ratio and... |
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| Keywords: | uble-layer cylindrical reticulated shells wind-induced response time-domain analysis wind vibration coefficient prestressing |
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