筒架支撑式整体钢平台模架体系风致响应研究

发布时间：2017-12-30 19:22

本文关键词：筒架支撑式整体钢平台模架体系风致响应研究　出处：《建筑结构学报》2016年12期 　论文类型：期刊论文

【摘要】：整体钢平台模架体系是为核心筒的施工而研发的辅助装备,为研究其风致动力响应,设计并制作了整体钢平台模架体系的气弹模型和核心筒刚性模型,并将两者按照实际工程情况进行组装。通过风洞试验,测量了整体钢平台模型在不同风速、不同风向角和提升前后两种工况下的位移和加速度响应。试验结果表明:均匀紊流场中,整体钢平台出现了明显的整体扭转振动现象;风向角0°为最不利风向角,顺风向响应远大于横风向响应;提升后工况的位移和加速度响应大于提升前工况;均匀紊流场中的位移大于均匀流场的位移响应,脉动风对整体钢平台的影响不可忽略。风向角0°、提升后工况为最不利工况,故应将其作为整体钢平台的设计工况,整体钢平台的计算可不考虑核心筒,这不仅使计算过程得到简化,且结果偏于安全。
[Abstract]:The integral steel platform mould frame system is the auxiliary equipment developed for the construction of the core tube. In order to study its wind-induced dynamic response, the Aeroelastic model and the core tube rigid model of the integral steel platform die frame system are designed and made. By wind tunnel test, the whole steel platform model is measured at different wind speed. The response of displacement and acceleration under different wind direction angles and before and after lifting. The experimental results show that the whole steel platform has obvious global torsional vibration phenomenon in the uniform turbulent flow field. The wind direction angle 0 掳is the most unfavorable wind direction angle, the downstream wind direction response is much larger than the cross wind direction response; The response of displacement and acceleration after lifting is larger than that before lifting. The displacement in the uniform turbulence field is larger than the displacement response in the uniform flow field. The effect of pulsating wind on the whole steel platform can not be ignored. The wind direction angle is 0 掳and the working condition after lifting is the most unfavorable condition. Therefore, it should be regarded as the design condition of the integral steel platform. The calculation of the integral steel platform can not take the core tube into account, which not only simplifies the calculation process, but also results in safety.
【作者单位】：同济大学土木工程学院;上海建工集团股份有限公司;
【基金】：“十二五”国家科技支撑计划(2014BAJ03B01)
【分类号】：TU731.2;TU973.213
【正文快照】： 0 引言在上海中心大厦核心筒施工中采用了筒架支撑式整体钢平台模架体系,简称整体钢平台模架体系(inlegral steel platform system.ISPS).、该模架体系的应用,有效地提高了施工效率,为核心筒顺利施工提供了保障。同时通过钢梁组成的平台层与外挂脚手架相连接,形成了全封闭的

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