| 高层建筑附着升降脚手架风振系数研究 |
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| 引用本文： | 李国强,岳峰,袁勇,叶可明.高层建筑附着升降脚手架风振系数研究[J].地震工程与工程振动,2004,24(5):62-67. |
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| 作者姓名： | 李国强 岳峰 袁勇 叶可明 |
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| 作者单位： | 同济大学,建筑工程系,上海,200092;上海建工(集团)总公司,上海,200120 |
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| 基金项目： | 上海市建设技术发展基金项目(A9900105) |
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| 摘 要： | 附着升降脚手架是适应高层建筑，特别是超高层建筑施工需要的新型脚手架，近年来，在我国应用较为广泛。风荷载是该类脚手架的主导设计荷载，特别是当爬升至150m高度以上时，风荷载对脚手架的安全使用起着决定性作用。风振系数是脚手架风荷载计算中的重要参数之一。本文通过对脉动风作用下附着升降脚手架与建筑结构共同工作的随机振动分析，得到了附着升降脚手架在爬升阶段和下降阶段的风振系数表达式。对本文大量电算结果与现行国家标准和地方规程的有关规定进行了比较分析后认为，脚手架在爬升阶段和下降阶段的风振系数与所附着建筑结构的风振系数有着不同的数值及变化规律。现行国家标准和地方规程对于爬升高度超过100m时将某一位置处脚手架的风振系数用建筑结构在该点的风振系数来近似代替，或根本不计入风振系数的做法，会使得附着升降脚手架的风荷载计算在爬升阶段以及下降阶段产生不同性质或不同程度的误差。本文建议不论附着升降脚手架的使用高度是否已超过100m均应计算脚手架自身的风振系数。
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| 关 键 词： | 高层建筑 施工 附着升降脚手架 风振系数 |
| 文章编号： | 1000-1301(2004)05-0062-06 |
Research on wind-induced vibration coefficient of self-climbing scaffold attached to tall buildings in construction |
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| Li Guoqiang.Research on wind-induced vibration coefficient of self-climbing scaffold attached to tall buildings in construction[J].Earthquake Engineering and Engineering Vibration,2004,24(5):62-67. |
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| Authors: | Li Guoqiang |
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| Institution: | Li Guoqiang~ |
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| Abstract: | The self-climbing scaffolds have been widely used in construction of tall buildings in China in recent years. Wind load on scaffolds may be much greater than dead load and be the dominant effect as the scaffolds climb over 150m in height. However, there have been few guidelines and relatively few reports or papers for the safe design and the use of this kind of scaffold. Wind vibration coefficient is an important factor for calculation of wind load. In the paper, by using random vibration theory, formulae are obtained for predicting the wind vibration coefficients of the scaffolds both at the two stages of climbing up and down. Some conclusions are drawn by comparing the results with suggestion of the currently effective code. The latter, substituting the wind vibration coefficients of the scaffolds approximately by that of the main structure when it climbs over 100m, may underestimate wind-induced vibration of attached scaffold as it climbs over a certain height at the stage of climbing up and at the whole stage of climbing down. Therefore, in this paper, the formulae proposed are suggested for getting the wind vibration coefficients of the scaffold itself whether it climbs over 100m in height or not. The research provides useful guidelines for the safe design of self-climbing scaffold. |
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| Keywords: | tall building construction self-climbing scaffold wind vibration coefficient |
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