轮辐式大跨度张拉结构地震反应分析(Ⅱ)
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摘要
以世纪莲体育中心轮辐式大跨度张拉索膜结构为研究对象,分析索系预应力变化时,地震作用下结构的动力反应。结果表明:索系预应力增大,结构刚度增加,地震作用下索系竖向位移减小,但其他杆件竖向位移增大,结构内力增加,地震力造成的损伤也增大;部分预应力索松弛对索系及压环轴应力影响不大,但对压环和腹杆的弯矩、索系及压环的位移影响较大,可通过监测构件内力及位移的变化来判断结构的损伤。
The rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was conducted to investigate its dynamic responses under earthquake waves when its cable's prestressing was changed.Results show that the structure's stiffness increases with increasing the prestressing of the cable system.At the same time,the vertical displacement of the cable system decreases under seismic loading,but other members' vertical displacement and their internal force increase.And the damage by seismic action to the structure also increases.The slacking of some cables' prestressing has little effects on the axis stress of the cable system and the compression ring,but more effects on their displacement.It has also more effects on the bending moment of the compression ring and the truss web.The damage of the structure can be identified by monitoring the changes of its displacement and internal force.
The rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was conducted to investigate its dynamic responses under earthquake waves when its cable's prestressing was changed.Results show that the structure's stiffness increases with increasing the prestressing of the cable system.At the same time,the vertical displacement of the cable system decreases under seismic loading,but other members' vertical displacement and their internal force increase.And the damage by seismic action to the structure also increases.The slacking of some cables' prestressing has little effects on the axis stress of the cable system and the compression ring,but more effects on their displacement.It has also more effects on the bending moment of the compression ring and the truss web.The damage of the structure can be identified by monitoring the changes of its displacement and internal force.
引文
[1]王龙.轮辐式索膜结构基于静力的安全评估技术研究[D].广州:华南理工大学,2009.
[2]王廷廷.索膜结构的健康监测与损伤识别研究[D].广州:华南理工大学,2007.
[3]王文胜,薄燕培,胡庆卫.佛山世纪莲体育中心索膜结构[C]∥第十一届空间结构学术会议论文集.南京:2005:604-609.
[4]冼耀强,刘伯权,丁江澍.轮辐式大跨度张拉结构地震反应分析(Ⅰ)[J].工业建筑,2011,41(4):112-118.
[2]王廷廷.索膜结构的健康监测与损伤识别研究[D].广州:华南理工大学,2007.
[3]王文胜,薄燕培,胡庆卫.佛山世纪莲体育中心索膜结构[C]∥第十一届空间结构学术会议论文集.南京:2005:604-609.
[4]冼耀强,刘伯权,丁江澍.轮辐式大跨度张拉结构地震反应分析(Ⅰ)[J].工业建筑,2011,41(4):112-118.
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