| 预应力组合网架结构的自振特性分析及现场测试 |
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| 引用本文： | 韩庆华,裴波,王成博,刘兴业.预应力组合网架结构的自振特性分析及现场测试[J].地震工程与工程振动,2004,24(2):118-124. |
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| 作者姓名： | 韩庆华 裴波 王成博 刘兴业 |
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| 作者单位： | 天津大学,建筑工程学院,天津,300072;江苏省苏州市建筑设计研究院,江苏,苏州,215002 |
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| 基金项目： | 天津市应用基础研究项目(033604411) |
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| 摘 要： | 本文采用子空间迭代法计算了预应力组合网架的自振频率与振型，分析总结了结构的自振特性及其影响因素，诸如索预应力、跨高比、边界条件、板和梁肋偏心、附加质量以及节点刚度的影响，并回归得出预应力组合网架基本周期简化计算公式。同时使用“脉动法”对天津一中新建活动中心楼层预应力组合网架进行了现场动力测试，结果表明预应力组合网架动力计算所采用的计算模型合理、计算分析结果可信，最后使用自由振动法及半功率点法得出了预应力组合网架结构的阻尼比，此值可作为钢与混凝土预应力组合网架结构的参考阻尼比。
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| 关 键 词： | 预应力组合网架 子空间迭代法 自振特性 影响因素 现场测试 阻尼比 |
| 文章编号： | 1000-1301(2004)02-0118-07 |
Analysis of natural vibration characteristics and testing on construction site of pre-stressed composite space truss |
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| HAN Qing-hua.Analysis of natural vibration characteristics and testing on construction site of pre-stressed composite space truss[J].Earthquake Engineering and Engineering Vibration,2004,24(2):118-124. |
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| Authors: | HAN Qing-hua |
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| Institution: | HAN Qing-hua~ |
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| Abstract: | Natural frequencies and mode shapes of pre-stressed composite space truss are calculated with sub-space iterative method. All kinds of influencing factors including prestress of cables, span-to-height ratio, boundary condition, decentration of plate and rib, added mass and node stiffness are analyzed. Simplified formula of basic period is presented. At the same time, natural frequencies of prestressed composite space truss in Tianjin No.1 middle school are tested with pulsatory method on construction site. The analysis model in dynamic calculation is rational and the results are reliable.Finally, damping ratio is calculated with free vibration method and half power points method. |
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| Keywords: | pre-stressed composite space truss sub-space iterative method natural vibration characteristics influencing factors testing on construction site damping ratio |
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