筒架支撑式整体钢平台模架体系风致响应研究  

Study on wind vibration of integral steel platform system supported by cylinder racks

作　　者：龚剑[1,2] 赵传凯[1] 杨振宇[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海建工集团股份有限公司,上海200080

出　　处：《建筑结构学报》2016年第12期49-57,共9页Journal of Building Structures

基　　金："十二五"国家科技支撑计划(2014BAJ03B01)

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。Integral steel platform system （ISPS） is one kind of construction equipment which is developed to construct core tube of high-rise buildings. An aeroelastic model of ISPS and a rigid model of core tube were designed, manufactured and assembled together in accordance with the actural engineering situation in order to research wind- induced vibration. Wind tunnel experiments were carried out to measure the displacements and accelerations of ISPS under different wind speeds, wind angles for two work conditions, namely after-lifting condition and before-lifting condition. The test results show that obvious torsion vibration appears in turbulence flow field. The most unfavorable wind angle is the wind angle of 0°. Response values in along wind direction are greater than those in across wind direction. Displacements and accelerations in CONDITION A are greater than those in CONDITION B; Displacements in turbulence flow field are greater than those in uniform flow field, and the impact of fluctuating wind on the structure cannot be ignored. The most adverse case is CONDITION A with 0° wind angle, thus this case should be regarded as the design condition of ISPS. If only the ISPS is taken as the analysis object while do not consider the core tube, calculation and analysis of the ISPS can be greatly simplified and more secure.

关 键 词：整体钢平台 气弹模型 风洞试验 风致动力响应 

分 类 号：TU392.603[建筑科学—结构工程] TU312.1