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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。
In order to study the wind-induced dynamic response, the overall steel platform formwork system is an auxiliary equipment developed for the construction of the core tube. The aeroelastic model and the core-tube rigid model of the overall steel platform formwork system are designed and manufactured. The actual project situation for assembly. Through the wind tunnel test, the displacement and acceleration responses of the whole steel platform model under different wind speeds, different wind direction angles and before and after lifting are measured. The experimental results show that the whole steel platform exhibits obvious torsional vibration in the uniform turbulent flow field. Wind direction angle 0 ° is the most unfavorable wind direction angle, and the response to the wind direction is much greater than that to the cross wind direction. The displacement and acceleration response Which is larger than that before lifting. The displacement in uniform turbulent flow field is larger than that of uniform flow field. The effect of fluctuating wind on the whole steel platform can not be neglected. The wind direction angle is 0 ° and the condition after lifting is the most unfavorable working condition. Therefore, it should be taken as the design condition of the whole steel platform. The calculation of the whole steel platform may not consider the core barrel. This not only simplifies the calculation process, Safety.