徐龙河, 刘媛媛, 谢行思. 地震-风耦合作用下钢框架-自复位支撑筒结构性能研究[J]. 工程力学, 2022, 39(11): 186-195. DOI: 10.6052/j.issn.1000-4750.2021.07.0517
引用本文: 徐龙河, 刘媛媛, 谢行思. 地震-风耦合作用下钢框架-自复位支撑筒结构性能研究[J]. 工程力学, 2022, 39(11): 186-195. DOI: 10.6052/j.issn.1000-4750.2021.07.0517
XU Long-he, LIU Yuan-yuan, XIE Xing-si. PERFORMANCE STUDY OF STEEL FRAME SELF-CENTERING BRACED TUBE STRUCTURE UNDER COUPLING ACTION OF EARTHQUAKE AND WIND[J]. Engineering Mechanics, 2022, 39(11): 186-195. DOI: 10.6052/j.issn.1000-4750.2021.07.0517
Citation: XU Long-he, LIU Yuan-yuan, XIE Xing-si. PERFORMANCE STUDY OF STEEL FRAME SELF-CENTERING BRACED TUBE STRUCTURE UNDER COUPLING ACTION OF EARTHQUAKE AND WIND[J]. Engineering Mechanics, 2022, 39(11): 186-195. DOI: 10.6052/j.issn.1000-4750.2021.07.0517

地震-风耦合作用下钢框架-自复位支撑筒结构性能研究

PERFORMANCE STUDY OF STEEL FRAME SELF-CENTERING BRACED TUBE STRUCTURE UNDER COUPLING ACTION OF EARTHQUAKE AND WIND

  • 摘要: 基于自回归模型分别模拟重现期为1年、10年和50年下不同高度处的风荷载时程,并与不同峰值加速度的地震动记录进行组合,对一布置预压碟簧自复位耗能(PS-SCED)支撑的50层钢框架-自复位支撑筒结构在地震-风耦合作用下的性能进行研究。结果表明:在地震-风耦合作用下,风荷载强度的增大对结构层间位移角的增大效果并不显著,结构层间位移角主要由地震动强度控制;风荷载强度越大,结构层间变形集中程度越小;地震动强度越小,风荷载对结构基底剪力影响越显著;地震动强度越大,地震-风耦合作用下结构各层加速度放大系数与地震单独作用下的结果差异越显著;PS-SCED支撑在地震-风耦合作用下能充分发挥耗能能力,有效保护主体结构,其良好的自复位特性能有效减小结构的残余变形。

     

    Abstract: Based on an auto-regressive model, the wind load time histories at different heights with return periods of one year, ten years and fifty years are simulated respectively and combined with earthquakes with different peak ground accelerations to study the performance of a 50-storey steel frame braced tube structure with pre-pressed spring self-centering energy dissipation (PS-SCED) braces. The results indicate that under the coupling action of earthquake and wind, the increase of wind load intensity has no significant effect on the interstorey drift ratio which is mainly influenced by earthquake intensity. As wind load intensity increases, the structural interstorey drift concentration factor decreases. As earthquake intensity decreases, wind load influences the structural base shear force more significantly. The difference between structural acceleration amplification coefficients under the coupling action of earthquake and wind and those solely under the earthquake is more significant with the increase of earthquake intensity. The PS-SCED braces dissipate energy sufficiently subjected to the coupling action of earthquake and wind to protect structure effectively, and the structural residual deformation is reduced obviously due to their excellent self-centering behavior.

     

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